summaryrefslogtreecommitdiffstats
path: root/configure.ac
blob: b76f18ff29fbb641b1a7985218d58d271d848558 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
## Process this file with autoconf to produce configure.
##
## Copyright by The HDF Group.
## All rights reserved.
##
## This file is part of HDF5.  The full HDF5 copyright notice, including
## terms governing use, modification, and redistribution, is contained in
## the COPYING file, which can be found at the root of the source code
## distribution tree, or in https://www.hdfgroup.org/licenses.
## If you do not have access to either file, you may request a copy from
## help@hdfgroup.org.

## ----------------------------------------------------------------------
## Initialize configure.
##
AC_PREREQ([2.71])

## AC_INIT takes the name of the package, the version number, and an
## email address to report bugs. AC_CONFIG_SRCDIR takes a unique file
## as its argument.
##
## NOTE: Do not forget to change the version number here when we do a
## release!!!
##
AC_INIT([HDF5], [1.15.0], [help@hdfgroup.org])

AC_CONFIG_SRCDIR([src/H5.c])
AC_CONFIG_HEADERS([src/H5config.h])

AC_CONFIG_AUX_DIR([bin])
AC_CONFIG_MACRO_DIR([m4])

## AM_INIT_AUTOMAKE takes a list of options that should be applied to
## every Makefile.am when automake is run.
AM_INIT_AUTOMAKE([foreign subdir-objects])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) # use silent rules where available - automake 1.11

## AM_MAINTAINER_MODE determines the behavior of "rebuild rules" that contain
## dependencies for Makefile.in files, configure, src/H5config.h, etc. If
## AM_MAINTAINER_MODE is enabled, these files will be rebuilt if out of date.
## When disabled, the autotools build files can get out of sync and the build
## system will not complain or try to regenerate downstream files.
##
## The AM_MAINTAINER_MODE macro also determines whether the
## --(enable|disable)-maintainer-mode configure option is available. When the
## macro is present, with or without a parameter, the option will be added
## to the generated configure script.
##
## In summary:
##
##  AM_MAINTAINER_MODE([enable])
##      - Build dependencies ON by default
##      - Configure option exists
##
##  AM_MAINTAINER_MODE([disable])
##      - Build dependencies OFF by default
##      - Configure option exists
##
##  AM_MAINTAINER_MODE
##      - Build dependencies OFF by default
##      - Configure option exists
##
##  No AM_MAINTAINER_MODE macro
##      - Build dependencies ON by default
##      - No configure option to control build dependencies
##
## The biggest concern for us is that version control systems like git
## usually don't preserve dependencies between timestamps, so the build
## system will often think that upstream build files like Makefile.am are
## dirty and that rebuilding needs to occur when it doesn't. This is a problem
## in release branches where we provide the autotools-generated files. Users
## who don't have autoconf, automake, etc. will then have difficulty building
## release branches checked out from git.
##
## By default, maintainer mode is enabled in development branches and disabled
## in release branches.
AM_MAINTAINER_MODE([enable])

## ----------------------------------------------------------------------
## Set prefix default (install directory) to a directory in the build area.
## This allows multiple src-dir builds within one host.
AC_PREFIX_DEFAULT([`pwd`/hdf5])

## Run post processing on files created by configure
##
## src/H5pubconf.h:
## Generate src/H5pubconf.h from src/H5config.h by prepending H5_ to all
## macro names. This avoid name conflict between HDF5 macro names and those
## generated by another software package that uses the HDF5 library.
##
## src/libhdf5.settings:
## Remove all lines beginning with "#" which are generated by CONDITIONAL's
## of configure.
##
## src/H5build_settings.c
## Remove all lines beginning with "#" which are generated by CONDITIONAL's
## of configure. This uses a check for whitespace after the pound sign
## to avoid clobbering include statements.
AC_CONFIG_COMMANDS([pubconf], [
  echo "creating src/H5pubconf.h"
  sed 's/#define /#define H5_/' <src/H5config.h |\
    sed 's/#undef /#undef H5_/' >pubconf
  if test ! -f src/H5pubconf.h; then
    mv -f pubconf src/H5pubconf.h
  elif (diff pubconf src/H5pubconf.h >/dev/null); then
    rm -f pubconf
    echo "src/H5pubconf.h is unchanged"
  else
    mv -f pubconf src/H5pubconf.h
  fi
  echo "Post process src/libhdf5.settings"
  sed '/^#/d' < src/libhdf5.settings > libhdf5.settings.TMP
  cp libhdf5.settings.TMP src/libhdf5.settings
  rm -f libhdf5.settings.TMP
  echo "Post process src/H5build_settings.c"
  sed '/^# /d' < src/H5build_settings.c > H5build_settings.TMP
  cp H5build_settings.TMP src/H5build_settings.c
  rm -f H5build_settings.TMP
])

## It's possible to configure for a host other than the one on which
## configure is currently running by using the --host=foo flag.
## For machines on which HDF5 is often configured, it can be convenient
## to specify the name of the machine rather than its canonical type.
##
## There are currently no hosts, but if there were they would be
## listed by hostname and the alias would point to a file in
## the config directory:
##
##case $host_alias in
##  <some host>)
##    host_alias=<config file in config directory>
##    ;;
##esac

AC_CANONICAL_HOST
AC_SUBST([CPPFLAGS])
AC_SUBST([JNIFLAGS])
AC_SUBST([AR_FLAGS])

## H5_CFLAGS (and company) are for CFLAGS that should be used on HDF5, but
## not exported to h5cc (or h5fc, etc.)
##
AC_SUBST([H5_CFLAGS])
AC_SUBST([H5_CPPFLAGS])
AC_SUBST([H5_FCFLAGS])
AC_SUBST([H5_CXXFLAGS])
AC_SUBST([H5_JNIFLAGS])
AC_SUBST([H5_JAVACFLAGS])
AC_SUBST([H5_JAVAFLAGS])
AC_SUBST([H5_LDFLAGS])

## AM_CFLAGS (and company) are for CFLAGS that should be used on HDF5,
## and WILL be exported to h5cc (or h5fc, etc) if set by configure.
AC_SUBST([AM_CFLAGS])
AC_SUBST([AM_FCFLAGS])
AC_SUBST([AM_CXXFLAGS])
AC_SUBST([AM_CPPFLAGS])
AC_SUBST([AM_JNIFLAGS])
AC_SUBST([AM_JAVACFLAGS])
AC_SUBST([AM_JAVAFLAGS])
AC_SUBST([AM_LDFLAGS])

## Make sure flags are initialized.
AM_CFLAGS="${AM_CFLAGS}"
AM_CXXFLAGS="${AM_CXXFLAGS}"
AM_FCFLAGS="${AM_FCFLAGS}"
AM_CPPFLAGS="${AM_CPPFLAGS}"
AM_JNIFLAGS="${AM_JNIFLAGS}"
AM_JAVACFLAGS="${AM_JAVACFLAGS}"
AM_JAVAFLAGS="${AM_JAVAFLAGS}"
AM_LDFLAGS="${AM_LDFLAGS}"

## Flags passed in by the user
CFLAGS="${CFLAGS}"
CXXFLAGS="${CXXFLAGS}"
FCFLAGS="${FCFLAGS}"
CPPFLAGS="${CPPFLAGS}"
JNIFLAGS="${JNIFLAGS}"
JAVACFLAGS="${JAVACFLAGS}"
JAVAFLAGS="${JAVAFLAGS}"
LDFLAGS="${LDFLAGS}"
AR_FLAGS="${AR_FLAGS}"

## Configure may need to alter any of the *FLAGS variables in order for
## various checks to work correctly. Save the user's value here so it
## can be restored once all configure checks are complete.
saved_user_CFLAGS="$CFLAGS"
saved_user_CXXFLAGS="$CXXFLAGS"
saved_user_FCFLAGS="$FCFLAGS"
saved_user_JAVACFLAGS="$JAVACFLAGS"
saved_user_JAVAFLAGS="$JAVAFLAGS"
saved_user_LDFLAGS="$LDFLAGS"
saved_user_CPPFLAGS="$CPPFLAGS"

## Strip out -Werror from CFLAGS since that can cause checks to fail when
## compiling test programs fails due to warnings
##
##  Regex:
##
##      -Werror         Literal -Werror
##      \(              Start optional capturing group
##      =               Literal equals sign
##      [^[:space:]-]   Non-space characters
##      \+              1 or more of the above
##      \)              End optional capturing group
##      \?              0 or 1 capturing group matches
##
WERROR_SED= "sed -e 's/-Werror\(=[^[:space:]]\+\)\?//g'"

CFLAGS="`echo $CFLAGS | $WERROR_SED`"
CXXFLAGS="`echo $CXXFLAGS | $WERROR_SED`"
FCFLAGS="`echo $FCFLAGS | $WERROR_SED`"
JAVACFLAGS="`echo $JAVACFLAGS | $WERROR_SED`"
CPPFLAGS="`echo $CPPFLAGS | $WERROR_SED`"

## Support F9X variable to define Fortran compiler if FC variable is
## not used.  This should be deprecated in the future.
if test "x" = "x$FC"; then
  FC=${F9X}
fi

## ----------------------------------------------------------------------
## Dump all shell variables values.
##
AC_MSG_CHECKING([shell variables initial values])
set >&AS_MESSAGE_LOG_FD
AC_MSG_RESULT([done])

## ----------------------------------------------------------------------
## Save system information for the library settings file.
##
AC_SUBST([UNAME_INFO])
UNAME_INFO=`uname -a`

## ----------------------------------------------------------------------
## Some platforms have broken basename, and/or xargs programs. Check
## that it actually does what it's supposed to do. Catch this early
## since configure and scripts relies upon them heavily and there's
## no use continuing if it's broken.
##
AC_MSG_CHECKING([if basename works])
BASENAME_TEST="`basename /foo/bar/baz/qux/basename_works`"
if test $BASENAME_TEST != "basename_works"; then
  AC_MSG_ERROR([basename program doesn't work])
else
  AC_MSG_RESULT([yes])
fi

## xargs basename used in configure to get the CC_BASENAME value
AC_MSG_CHECKING([if xargs works])
XARGS_TEST="`echo /foo/bar/baz/qux/xargs_works | xargs basename`"
if test $XARGS_TEST != "xargs_works"; then
  AC_MSG_ERROR([xargs program doesn't work])
else
  AC_MSG_RESULT([yes])
fi

## ----------------------------------------------------------------------
## Check that the cache file was build on the same host as what we're
## running on now.
##
AC_CACHE_CHECK([for cached host], [hdf5_cv_host], [hdf5_cv_host="none"]);
if test $hdf5_cv_host = "none"; then
  hdf5_cv_host=$host
elif test $hdf5_cv_host != $host; then
  AC_MSG_ERROR([
     The config.cache file was generated on $hdf5_cv_host but
     this is $host.  Please remove that file and try again.
     config.cache file is invalid])
fi

## ----------------------------------------------------------------------
## Check if we should consider certain compiler warnings as errors
##
## We have to set WARNINGS_AS_ERRORS before sourcing a $host_config
## file, below.
##
## These should NOT be on by default as the risk of breakage is high
## when compiling HDF5 on new (or new versions) of platforms and
## compilers. It can also cause failures when header files we have no
## control over (e.g. MPI, HDFS) raise warnings.
##
AC_MSG_CHECKING([enable warnings as errors])
AC_ARG_ENABLE([warnings-as-errors],
              [AS_HELP_STRING([--enable-warnings-as-errors],
                              [Determines whether certain warnings will be
                               considered errors. This is mainly for use
                               by HDF5 library developers.
                               [default=no]
                               ])],
              [WARNINGS_AS_ERRORS=$enableval])

## Set default
if test "X-$WARNINGS_AS_ERRORS" = X- ; then
  WARNINGS_AS_ERRORS=no
fi

case "X-$WARNINGS_AS_ERRORS" in
  X-yes|X-no)
    AC_MSG_RESULT([$WARNINGS_AS_ERRORS])
    ;;
  *)
    AC_MSG_ERROR([Unrecognized value: $WARNINGS_AS_ERRORS])
    ;;
esac

## ----------------------------------------------------------------------
## Source any special files that we need.  These files normally aren't
## present but can be used by the maintainers to fine tune things like
## turning on debug or profiling flags for the compiler.  The search order
## is:
##
##    CPU-VENDOR-OS
##    VENDOR-OS
##    CPU-OS
##    CPU-VENDOR
##    OS
##    VENDOR
##    CPU
##
## If the `OS' ends with a version number then remove it. For instance,
## `freebsd3.1' would become `freebsd'

case $host_os in
  aix*)
    host_os_novers=aix
    ;;
  freebsd*)
    host_os_novers=freebsd
    ;;
  netbsd*)
    host_os_novers=netbsd
    ;;
  solaris*)
    host_os_novers=solaris
    ;;
  *)
    host_os_novers=$host_os
    ;;
esac

host_config="none"
for f in $host_cpu-$host_vendor-$host_os \
         $host_cpu-$host_vendor-$host_os_novers \
         $host_vendor-$host_os \
         $host_vendor-$host_os_novers \
         $host_cpu-$host_os \
         $host_cpu-$host_os_novers \
         $host_cpu-$host_vendor \
         $host_os \
         $host_os_novers \
         $host_vendor \
         $host_cpu ; do
  AC_MSG_CHECKING([for config $f])
  if test -f "$srcdir/config/$f"; then
    host_config=$srcdir/config/$f
    AC_MSG_RESULT([found])
    break
  fi
  AC_MSG_RESULT([no])
done
if test "X$host_config" != "Xnone"; then
  CC_BASENAME="`echo $CC | cut -f1 -d' ' | xargs basename 2>/dev/null`"
  . $host_config
fi

## Source any special site-specific file
hname="`hostname`"
while test -n "$hname"; do
  file=$srcdir/config/site-specific/host-$hname
  AC_MSG_CHECKING([for config $file])
  if test -f "$file"; then
    . $file
    AC_MSG_RESULT([found])
    break
  fi
  AC_MSG_RESULT([no])
  hname_tmp=$hname
  hname="`echo $hname | cut -d. -f2-99`"
  test "$hname_tmp" = "$hname" && break
done

##
## Enable/disable sanitizer checks for clang compilers, initially address sanitizer
##
AC_MSG_CHECKING([for clang sanitizer checks])
AC_ARG_ENABLE([sanitize-checks],
              [AS_HELP_STRING([--enable-sanitize-checks=address],
                              [(clang/clang++ compilers only) Enable sanitize checks.
                               Address is useful for detecting issues dealing with
                               memory. See AddressSanitizer in config/sanitizer/README.md
                               for more information.
                               [default=none]
                               ])],
              [CLANG_SANITIZE_CHECKS=$enableval])

# Set default
if test "X-$CLANG_SANITIZE_CHECKS" = X- ; then
  CLANG_SANITIZE_CHECKS=none
fi

if test "X$CC_BASENAME" = "Xclang"; then
  AC_SUBST([CLANG_SANITIZE_CHECKS])

  # There are several sanitizer tools.  At present we are testing
  # and describing only -fsanitizer=address with autotools.
  case "X-$CLANG_SANITIZE_CHECKS" in
    X-no|X-none)
      CLANG_SANITIZE_CHECKS=none
      CLANG_SANITIZE_LIST=
      ;;
    *)
      CLANG_SANITIZE_LIST=$CLANG_SANITIZE_CHECKS
      ;;
  esac
  AC_MSG_RESULT([$CLANG_SANITIZE_CHECKS])

  # Other tools can be added to the list of checks
  # The clang compiler doesn't support some of them; they should be
  # checked before adding them to the list in the help message.
  # The sanitizers/sanitizers.cmake file lists these options:
  # address, memory, memoryWithOrigins, undefined, thread, leak,
  # 'address;undefined'.  Which and which combinations of these are
  #  supported varies by compiler version, but unsupported options
  # or combinations will result in configure errors reported in config.log.
  # Comma separated lists of sanitize options will be entered intact in
  # one -fsanitize=<list> flag.  Space separated lists will be entered in
  # separate -fsanitize=<item> flags.
  # NOTE: No sanity checking done here!
  if test -n "$CLANG_SANITIZE_LIST"; then
    H5_CFLAGS="$H5_CFLAGS -fno-omit-frame-pointer"
    H5_CXXFLAGS="$H5_CXXFLAGS -fno-omit-frame-pointer"
    for sanitizer in `echo $CLANG_SANITIZE_LIST`; do
      H5_CFLAGS="$H5_CFLAGS -fsanitize=${sanitizer}"
      H5_CXXFLAGS="$H5_CXXFLAGS -fsanitize=${sanitizer}"
    done
  fi
fi

## ----------------------------------------------------------------------
## Determine build mode (debug, production, clean).
## This has to be done early since the build mode is referred to
## frequently.
##
AC_MSG_CHECKING([build mode])
AC_ARG_ENABLE([build-mode],
              [AS_HELP_STRING([--enable-build-mode=(debug|production|clean)],
                              [Sets the build mode. Debug turns on symbols, API
                               tracing, asserts, and debug optimization,
                               as well as several other minor configure options
                               that aid in debugging.
                               Production turns high optimizations on.
                               Clean turns nothing on and disables optimization
                               (i.e.: a 'clean slate' configuration).
                               All these settings can be overridden by using
                               specific configure flags.
                               [default=debug]
                               ])],
              [BUILD_MODE=$enableval])

## Set the default
## Depends on branch, set via script at branch creation time
if test "X-$BUILD_MODE" = X- ; then
    BUILD_MODE=debug
fi

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([BUILD_MODE])

case "X-$BUILD_MODE" in
  X-clean)
    AC_MSG_RESULT([clean])
    ;;
  X-debug)
    AC_DEFINE([DEBUG_BUILD], [1], [Define if this is a debug build.])
    H5_CFLAGS="$H5_CFLAGS $DEBUG_CFLAGS"
    H5_CPPFLAGS="$H5_CPPFLAGS $DEBUG_CPPFLAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $DEBUG_CXXFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $DEBUG_FCFLAGS"
    AC_MSG_RESULT([debug])
    ;;
  X-production)
    H5_CFLAGS="$H5_CFLAGS $PROD_CFLAGS"
    H5_CPPFLAGS="$H5_CPPFLAGS $PROD_CPPFLAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $PROD_CXXFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $PROD_FCFLAGS"
    AC_MSG_RESULT([production])
    ;;
  *)
    AC_MSG_ERROR([Unrecognized build mode: $BUILD_MODE. Use debug, production, or clean.])
esac

## ----------------------------------------------------------------------
## Some built-in configure checks can only see CFLAGS (not AM_CFLAGS), so
## we need to add this in so configure works as intended. We will need to
## reset this value at the end of configure, to preserve the user's settings.
CFLAGS="${AM_CFLAGS} ${CFLAGS}"
FCFLAGS="${AM_FCFLAGS} ${FCFLAGS}"
JAVACFLAGS="${AM_JAVACFLAGS} ${JAVACFLAGS}"
JAVAFLAGS="${AM_JAVAFLAGS} ${JAVAFLAGS}"
CXXFLAGS="${AM_CXXFLAGS} ${CXXFLAGS}"
CPPFLAGS="${AM_CPPFLAGS} ${CPPFLAGS}"
LDFLAGS="${AM_LDFLAGS} ${LDFLAGS}"

## ----------------------------------------------------------------------
## Enable dependency tracking unless the configure options or a
## site-specific file told us not to.  This prevents configure from
## silently disabling dependencies for some compilers.
##
if test -z "${enable_dependency_tracking}"; then
  enable_dependency_tracking="yes"
fi

## ----------------------------------------------------------------------
## Check for programs.
##
AC_PROG_CC
CC_BASENAME="`echo $CC | cut -f1 -d' ' | xargs basename 2>/dev/null`"

## ----------------------------------------------------------------------------
## Configure disallows unsupported combinations of options. However, users
## may want to override and build with unsupported combinations for their
## own use. They can use the --enable-unsupported configure flag, which
## ignores any errors from configure due to incompatible flags.
AC_MSG_CHECKING([if unsupported combinations of configure options are allowed])
AC_ARG_ENABLE([unsupported],
              [AS_HELP_STRING([--enable-unsupported],
                              [Allow unsupported combinations of configure options])],
              [ALLOW_UNSUPPORTED=$enableval])

case "X-$ALLOW_UNSUPPORTED" in
  X-|X-no)
    AC_MSG_RESULT([no])
    ;;
  X-yes)
    AC_MSG_RESULT([yes])
    ;;
  *)
    ;;
esac

## ----------------------------------------------------------------------
## Data types and their sizes.
##
AC_TYPE_OFF_T
AC_CHECK_TYPE([ssize_t], [],
        [AC_DEFINE_UNQUOTED([ssize_t], [long],
                [Define to `long' if <sys/types.h> does not define.])])
AC_C_BIGENDIAN
AC_CHECK_SIZEOF([char])
AC_CHECK_SIZEOF([short])
AC_CHECK_SIZEOF([int])
AC_CHECK_SIZEOF([unsigned])
AC_CHECK_SIZEOF([long])
AC_CHECK_SIZEOF([long long])
AC_CHECK_SIZEOF([float])
AC_CHECK_SIZEOF([double])
AC_CHECK_SIZEOF([long double])

## ----------------------------------------------------------------------
## Check if the Fortran interface should be enabled
##

## This needs to be exposed for the library info file even if Fortran is disabled.
AC_SUBST([HDF_FORTRAN])

## Default is no Fortran
HDF_FORTRAN=no

AC_SUBST([HDF5_INTERFACES]) HDF5_INTERFACES=""
AC_MSG_CHECKING([if Fortran interface enabled])
AC_ARG_ENABLE([fortran],
              [AS_HELP_STRING([--enable-fortran],
                              [Compile the Fortran interface [default=no]])],
              [HDF_FORTRAN=$enableval])

AC_MSG_RESULT([$HDF_FORTRAN])

if test "X$HDF_FORTRAN" = "Xyes"; then

## ----------------------------------------------------------------------
## Check for non-standard extension __FLOAT128
##
  HAVE_FLOAT128=0
  HAVE_QUADMATH=0
  FLT128_DIG=0
  LDBL_DIG=0

  AC_CHECK_SIZEOF([__float128])
  AC_CHECK_SIZEOF([_Quad])
  AC_CHECK_HEADERS([quadmath.h], [HAVE_QUADMATH=1], [])
  PAC_FC_LDBL_DIG

  AC_SUBST([PAC_C_MAX_REAL_PRECISION])

  if test "$ac_cv_sizeof___float128" != 0 && test "$FLT128_DIG" != 0 ; then
    AC_DEFINE([HAVE_FLOAT128], [1], [Determine if __float128 is available])
    PAC_C_MAX_REAL_PRECISION=$FLT128_DIG
  else
    PAC_C_MAX_REAL_PRECISION=$LDBL_DIG
  fi
  AC_DEFINE_UNQUOTED([PAC_C_MAX_REAL_PRECISION], $PAC_C_MAX_REAL_PRECISION, [Determine the maximum decimal precision in C])
  AC_MSG_RESULT([$PAC_C_MAX_REAL_PRECISION])

  VERS_MAJOR=`cat $srcdir/src/H5public.h | sed -n 's/^#define H5_VERS_MAJOR //p'`
  VERS_MINOR=`cat $srcdir/src/H5public.h | sed -n 's/^#define H5_VERS_MINOR //p'`
  VERS_RELEASE=`cat $srcdir/src/H5public.h | sed -n 's/^#define H5_VERS_RELEASE //p'`
  AC_DEFINE_UNQUOTED([VERS_MAJOR_TMP], $VERS_MAJOR, [Define major library version])
  AC_DEFINE_UNQUOTED([VERS_MINOR_TMP], $VERS_MINOR, [Define minor library version])
  AC_DEFINE_UNQUOTED([VERS_RELEASE_TMP], $VERS_RELEASE, [Define release library version])

## We will output an include file for Fortran, H5config_f.inc which
## contains various configure definitions used by the Fortran Library.
## Prepend H5_ to all macro names. This avoids name conflict between HDF5 macro
## names and those generated by another software package that uses the HDF5 library.
  AC_CONFIG_HEADERS([fortran/src/H5config_f.inc],
    [cat fortran/src/H5config_f.inc | sed '1d;s%^/\* \(.*\) \*/%\1%;s/#define /#define H5_/;s/#undef /#undef H5_/' >fortran/src/H5config_f.inc.tmp; sed -i 's\_TMP\\g' fortran/src/H5config_f.inc.tmp; mv -f fortran/src/H5config_f.inc.tmp fortran/src/H5config_f.inc])

  AC_SUBST([FC])

  HDF5_INTERFACES="$HDF5_INTERFACES fortran"

  ## --------------------------------------------------------------------
  ## HDF5 integer variables for the H5fortran_types.f90 file.
  ##
  AC_SUBST([R_LARGE])
  AC_SUBST([R_INTEGER])
  AC_SUBST([HADDR_T])
  AC_SUBST([HSIZE_T])
  AC_SUBST([HSSIZE_T])
  AC_SUBST([HID_T])
  AC_SUBST([SIZE_T])
  AC_SUBST([OBJECT_NAMELEN_DEFAULT_F])

  ## --------------------------------------------------------------------
  ## Fortran source extension
  ##
  AC_FC_SRCEXT([f90])

  AC_SUBST([F9XSUFFIXFLAG])
  AC_SUBST([FSEARCH_DIRS])

  ## --------------------------------------------------------------------
  ## Check for a Fortran compiler and how to include modules.
  ##
  AC_PROG_FC([PAC_FC_SEARCH_LIST],)
  AC_F9X_MODS

  ## Allow setting the fortran module install dir
  AC_ARG_WITH([fmoddir],
    [AS_HELP_STRING([--with-fmoddir=DIR], [Fortran module install directory])],
    [fmoddir=$withval],
    [fmoddir="\${includedir}"])
  AC_SUBST([fmoddir], [$fmoddir])

  ## Change to the Fortran 90 language
  AC_LANG_PUSH(Fortran)

  ## Checking if the compiler supports the required Fortran 2003 features and
  ## stopping if it does not.
  PAC_PROG_FC_HAVE_F2003_REQUIREMENTS

  if test "X$HAVE_F2003_REQUIREMENTS" = "Xno"; then
    AC_MSG_ERROR([Fortran compiler lacks required Fortran 2003 features; unsupported Fortran 2003 compiler, remove --enable-fortran])
  fi
  ## Checking if the compiler supports fortran character being allocatable
  PAC_HAVE_CHAR_ALLOC

  ## --------------------------------------------------------------------
  ## Define wrappers for the C compiler to use Fortran function names
  ##
  AC_FC_WRAPPERS

  ## --------------------------------------------------------------------
  ## See if the fortran compiler supports the intrinsic function "SIZEOF"
  PAC_PROG_FC_SIZEOF

  ## See if the fortran compiler supports the intrinsic function "C_SIZEOF"
  PAC_PROG_FC_C_SIZEOF

  ## See if the fortran compiler supports the intrinsic function "STORAGE_SIZE"
  PAC_PROG_FC_STORAGE_SIZE

  ## Set the sizeof function for use later in the fortran tests
  if test "X$HAVE_STORAGE_SIZE_FORTRAN" = "Xyes";then
    FC_SIZEOF_A="STORAGE_SIZE(a, c_size_t)/STORAGE_SIZE(c_char_'a',c_size_t)"
    FC_SIZEOF_B="STORAGE_SIZE(b, c_size_t)/STORAGE_SIZE(c_char_'a',c_size_t)"
    FC_SIZEOF_C="STORAGE_SIZE(c, c_size_t)/STORAGE_SIZE(c_char_'a',c_size_t)"
  else
    if test "X$HAVE_SIZEOF_FORTRAN" = "Xyes";then
      FC_SIZEOF_A="SIZEOF(a)"
      FC_SIZEOF_B="SIZEOF(b)"
      FC_SIZEOF_C="SIZEOF(c)"
    else
      ## If neither intrinsic functions SIZEOF or STORAGE_SIZE is available then stop configure with an error
      AC_MSG_ERROR([Fortran compiler requires either intrinsic functions SIZEOF or STORAGE_SIZE])
    fi
  fi

  ## See if the fortran compiler supports the intrinsic module "ISO_FORTRAN_ENV"
  PAC_PROG_FC_ISO_FORTRAN_ENV
  ## Check KIND and size of native integer
  PAC_FC_NATIVE_INTEGER

  ## Find all available KINDs
  PAC_FC_AVAIL_KINDS
  ## Find all sizeofs for available KINDs
  PAC_FC_SIZEOF_INT_KINDS
  PAC_FC_SIZEOF_REAL_KINDS

  AC_SUBST([PAC_FC_ALL_REAL_KINDS])
  AC_SUBST([PAC_FC_MAX_REAL_PRECISION])
  AC_SUBST([PAC_FORTRAN_NUM_INTEGER_KINDS])
  AC_SUBST([PAC_FC_ALL_INTEGER_KINDS])
  AC_SUBST([PAC_FC_ALL_REAL_KINDS_SIZEOF])
  AC_SUBST([PAC_FC_ALL_INTEGER_KINDS_SIZEOF])
  AC_SUBST([PAC_FORTRAN_NATIVE_INTEGER_KIND])
  AC_SUBST([PAC_FORTRAN_NATIVE_INTEGER_SIZEOF])
  AC_SUBST([PAC_FORTRAN_NATIVE_REAL_KIND])
  AC_SUBST([PAC_FORTRAN_NATIVE_REAL_SIZEOF])
  AC_SUBST([PAC_FORTRAN_NATIVE_DOUBLE_KIND])
  AC_SUBST([PAC_FORTRAN_NATIVE_DOUBLE_SIZEOF])
  AC_SUBST([HAVE_Fortran_INTEGER_SIZEOF_16])
  AC_SUBST([FORTRAN_HAVE_C_LONG_DOUBLE])
  AC_SUBST([FORTRAN_C_LONG_DOUBLE_IS_UNIQUE])
  AC_SUBST([FORTRAN_C_BOOL_IS_UNIQUE])
  AC_SUBST([H5CONFIG_F_NUM_RKIND])
  AC_SUBST([H5CONFIG_F_RKIND])
  AC_SUBST([H5CONFIG_F_RKIND_SIZEOF])
  AC_SUBST([H5CONFIG_F_NUM_IKIND])
  AC_SUBST([H5CONFIG_F_IKIND])
  AC_SUBST([Fortran_COMPILER_ID])
  Fortran_COMPILER_ID=none
  AC_DEFINE_UNQUOTED([Fortran_COMPILER_ID], $Fortran_COMPILER_ID, [Define Fortran compiler ID])

  ## Setting definition if there is a 16 byte fortran integer
  if `echo $PAC_FC_ALL_INTEGER_KINDS_SIZEOF | grep '16' >/dev/null`; then
    HAVE_Fortran_INTEGER_SIZEOF_16="1"
    AC_DEFINE([HAVE_Fortran_INTEGER_SIZEOF_16], [1], [Determine if INTEGER*16 is available])
  else
    HAVE_Fortran_INTEGER_SIZEOF_16="0"
    AC_DEFINE([HAVE_Fortran_INTEGER_SIZEOF_16], [0], [Determine if INTEGER*16 is available])
  fi

  if test "X$HAVE_STORAGE_SIZE_FORTRAN" = "Xyes"; then
    AC_DEFINE([FORTRAN_HAVE_STORAGE_SIZE], [1], [Define if we have Fortran intrinsic STORAGE_SIZE])
  fi

  if test "X$HAVE_C_SIZEOF_FORTRAN" = "Xyes"; then
    AC_DEFINE([FORTRAN_HAVE_C_SIZEOF], [1], [Define if we have Fortran intrinsic C_SIZEOF])
  fi

  if test "X$HAVE_SIZEOF_FORTRAN" = "Xyes"; then
    AC_DEFINE([FORTRAN_HAVE_SIZEOF], [1], [Define if we have Fortran intrinsic SIZEOF])
  fi

  if test "X$HAVE_CHAR_ALLOC_FORTRAN" = "Xyes"; then
    AC_DEFINE([FORTRAN_HAVE_CHAR_ALLOC], [1], [Define if Fortran supports allocatable character])
  fi

  ## See if C_LONG_DOUBLE is available
  PAC_PROG_FC_HAVE_C_LONG_DOUBLE

  FORTRAN_HAVE_C_LONG_DOUBLE="0"
  if test "X$HAVE_C_LONG_DOUBLE_FORTRAN" = "Xyes"; then
    FORTRAN_HAVE_C_LONG_DOUBLE="1"
    AC_DEFINE([FORTRAN_HAVE_C_LONG_DOUBLE], [1], [Define if we have Fortran C_LONG_DOUBLE])
  fi

  ## Is C_LONG_DOUBLE different from C_DOUBLE
  FORTRAN_C_LONG_DOUBLE_IS_UNIQUE="0"
  if test "$FORTRAN_HAVE_C_LONG_DOUBLE" = "1"; then
    PAC_PROG_FC_C_LONG_DOUBLE_EQ_C_DOUBLE
    if test "X$C_LONG_DOUBLE_IS_UNIQUE_FORTRAN" = "Xyes"; then
      FORTRAN_C_LONG_DOUBLE_IS_UNIQUE="1"
      AC_DEFINE([FORTRAN_C_LONG_DOUBLE_IS_UNIQUE], [1], [Define if Fortran C_LONG_DOUBLE is different from C_DOUBLE])
    else
      FORTRAN_C_LONG_DOUBLE_IS_UNIQUE="0"
    fi
  fi

  ## Is C_BOOL different from default LOGICAL
  FORTRAN_C_BOOL_IS_UNIQUE="0"
  PAC_PROG_FC_C_BOOL_EQ_LOGICAL
  if test "X$C_BOOL_IS_UNIQUE_FORTRAN" = "Xyes"; then
    FORTRAN_C_BOOL_IS_UNIQUE="1"
    AC_DEFINE([FORTRAN_C_BOOL_IS_UNIQUE], [1], [Define if Fortran C_BOOL is different from default LOGICAL])
  else
    FORTRAN_C_BOOL_IS_UNIQUE="0"
  fi

  FORTRAN_SIZEOF_LONG_DOUBLE=${ac_cv_sizeof_long_double}
  AC_DEFINE_UNQUOTED([FORTRAN_SIZEOF_LONG_DOUBLE], ["${ac_cv_sizeof_long_double}"], [Determine the size of C long double])

  dnl get the largest sizeof for REAL kinds
  max_real_fortran_sizeof="`echo $PAC_FC_ALL_REAL_KINDS_SIZEOF | sed -ne 's/.*,\([[0-9]]*\)}/\1/p'`"
  max_real_fortran_kind="`echo $PAC_FC_ALL_REAL_KINDS | sed -ne 's/.*,\([[0-9]]*\)}/\1/p'`"

  dnl remove the invalid kind from the list
  if test "$ac_cv_sizeof___float128" != 0;then
    if test "$ac_cv_sizeof___float128" != "$max_real_fortran_sizeof" &&
       test "${ac_cv_sizeof_long_double}" != "$max_real_fortran_sizeof" &&
       dnl account for the fact that the C compiler can have 16-byte __float128 and the Fortran compiler only has 8-byte doubles,
       dnl so we don't want to remove the 8-byte Fortran doubles. This is sometimes the case if different C and Fortran vendors
       dnl are used (for example gnu and pgi).
       test "${ac_cv_sizeof_double}" != "$max_real_fortran_sizeof" ; then
          AC_MSG_WARN([
           Fortran REAL(KIND=$max_real_fortran_kind) is $max_real_fortran_sizeof Bytes, but no corresponding C float type exists of that size
                     !!! Fortran interfaces will not be generated for REAL(KIND=$max_real_fortran_kind) !!!
          ])
      PAC_FC_ALL_REAL_KINDS="`echo $PAC_FC_ALL_REAL_KINDS | sed -e 's/,[[0-9]]\+}/}/g'`"
      PAC_FC_ALL_REAL_KINDS_SIZEOF="`echo $PAC_FC_ALL_REAL_KINDS_SIZEOF | sed -e 's/,[[0-9]]\+}/}/g'`"

    fi
  fi
  AC_MSG_CHECKING([for Fortran interoperable KINDS with C])
  AC_MSG_RESULT([$PAC_FC_ALL_REAL_KINDS])

  dnl count the number of real kinds
  H5CONFIG_F_NUM_RKIND="INTEGER, PARAMETER :: num_rkinds = `echo \"[$]PAC_FC_ALL_REAL_KINDS\" |  tr -d -c ',\n' | awk '{ print length + 1; }'`"
  H5CONFIG_F_RKIND="INTEGER, DIMENSION(1:num_rkinds) :: rkind = (/`echo $PAC_FC_ALL_REAL_KINDS | sed -e 's/{//g' | sed -e 's/}//g' | sed -e 's/ /,/g'`/)"
  H5CONFIG_F_RKIND_SIZEOF="INTEGER, DIMENSION(1:num_rkinds) :: rkind_sizeof = (/`echo $PAC_FC_ALL_REAL_KINDS_SIZEOF | sed -e 's/{//g' | sed -e 's/}//g'| sed -e 's/ /,/g'`/)"

  AC_DEFINE_UNQUOTED([H5CONFIG_F_NUM_RKIND], $H5CONFIG_F_NUM_RKIND, [Define number of valid Fortran REAL KINDs])
  AC_DEFINE_UNQUOTED([H5CONFIG_F_RKIND], $H5CONFIG_F_RKIND, [Define valid Fortran REAL KINDs])
  AC_DEFINE_UNQUOTED([H5CONFIG_F_RKIND_SIZEOF], $H5CONFIG_F_RKIND_SIZEOF, [Define valid Fortran REAL KINDs Sizeof])

## Change back to the C language
  AC_LANG_POP(Fortran)
else
  FC="no"
fi

## ----------------------------------------------------------------------
## Check if they would like the C++ interface compiled
##
## This needs to be exposed for the library info file even if C++ is disabled.
AC_SUBST([HDF_CXX])

## Default is no C++
HDF_CXX=no

## We need to check for a C++ compiler unconditionally, since
## AC_PROG_CXX defines some macros that Automake 1.9.x uses and will
## miss even if c++ is not enabled.
AC_PROG_CXX
AC_PROG_CXXCPP

AC_MSG_CHECKING([if c++ interface enabled])

AC_ARG_ENABLE([cxx],
              [AS_HELP_STRING([--enable-cxx],
                              [Compile the C++ interface [default=no]])],
              [HDF_CXX=$enableval])
AC_MSG_RESULT([$HDF_CXX])

if test "X$HDF_CXX" = "Xyes"; then
  HDF5_INTERFACES="$HDF5_INTERFACES c++"

  ## Expose the compiler for *.in files
  AC_SUBST([CXX])

  ## Change to the C++ language
  AC_LANG_PUSH(C++)

else
  CXX="no"
fi

## Change back to the C language
AC_LANG_POP(C++)


## ----------------------------------------------------------------------
## Check if they would like the High Level library  compiled
##

## This needs to be exposed for the library info file even if the HL
## library is disabled.
AC_SUBST([HDF5_HL])
AC_SUBST([HDF5_HL_TOOLS])
AC_SUBST([HDF5_HL_GIF_TOOLS])

## The high-level library and high-level tools are enabled unless the build mode
## is clean.
if test "X-$BUILD_MODE" = "X-clean" ; then
  HDF5_HL=no
  HDF5_HL_TOOLS=no
else
  HDF5_HL=yes
  HDF5_HL_TOOLS=yes
fi

## high-level library directories (set when needed, blank until then)
##
## main high-level library
AC_SUBST(HL)
HL=""
## Fortran high-level library
AC_SUBST(HL_FOR)
HL_FOR=""
## Tools high-level library
AC_SUBST(HL_TOOLS)
HL_TOOLS=""

AC_MSG_CHECKING([if the high-level library is enabled])
AC_ARG_ENABLE([hl],
     [AS_HELP_STRING([--enable-hl],
                     [Enable the high-level library.
                     [default=yes (unless build mode = clean)]
                     ])],
     [HDF5_HL=$enableval])

if test "X-$HDF5_HL" = "X-yes"; then
 AC_MSG_RESULT([yes])
 HL="hl"
 AC_DEFINE([INCLUDE_HL], [1],
           [Define if the high-level library headers should be included in hdf5.h])
else
  AC_MSG_RESULT([no])
fi

## ----------------------------------------------------------------------
## Enable new references for dimension scales
##
AC_SUBST([DIMENSION_SCALES_WITH_NEW_REF])
AC_MSG_CHECKING([whether to use new references with dimension scales]);
AC_ARG_ENABLE([dimension-scales-with-new-ref],
              [AS_HELP_STRING([--enable-dimension-scales-with-new-ref],
                     [Use new references when creating dimension scales.
                      [default=no]
                     ])],
             [DIMENSION_SCALES_WITH_NEW_REF=$enableval])

## Set the default value to use old references.
if test "X-$DIMENSION_SCALES_WITH_NEW_REF" = X- ; then
  DIMENSION_SCALES_WITH_NEW_REF=no
fi

case "X-$DIMENSION_SCALES_WITH_NEW_REF" in
  X-yes)
    AC_MSG_RESULT([yes])
    AC_DEFINE([DIMENSION_SCALES_WITH_NEW_REF], [1],
              [Define if new references for dimension scales were requested])

    ;;
  X-no)
    AC_MSG_RESULT([no])
    ;;
  *)
    AC_MSG_ERROR([Unrecognized value: $DIMENSION_SCALES_WITH_NEW_REF])
    ;;
esac

## ----------------------------------------------------------------------
## Check which archiving tool to use. This needs to be done before
## the LT_INIT macro.
##
if test -z "$AR"; then
  AC_CHECK_PROGS([AR], [ar xar], [:], [$PATH])
fi
AC_SUBST([AR])

# Set the default ar flags to cr
# The Automake default is to use cru and the 'u' causes ar
# to emit warnings on some platforms.
AR_FLAGS=cr


## Export the AR macro so that it will be placed in the libtool file
## correctly.
export AR

AC_PROG_MAKE_SET
AC_PROG_INSTALL


## ----------------------------------------------------------------------
## Set up ${TR} which is used to process the package list for extra
## debugging output in the C library.

AC_PATH_PROG([TR], [tr])


## ----------------------------------------------------------------------
## Check that time can be used with srcdir.  This is okay on most systems,
## but seems to cause problems on Cygwin.
## The solution on Cygwin is not to record execution time for tests.
##
## Note: This is still true as of Cygwin 1.7.32 (Aug 2014) on both 32-
## and 64-bit platforms. Given how long this has been true, it seems
## unlikely to change, but we should probably re-test this periodically.

AC_MSG_CHECKING([if srcdir= and time commands work together])

AC_SUBST([TIME])
TIME=time
TIME_TEST=`foo="bar" ${TIME} echo 'baz' 2> /dev/null | grep baz`

if test "X${TIME_TEST}" = "Xbaz"; then
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
  TIME=
fi


## The following variables are used to distinguish between building a
## serial and parallel library.
##
##    HAVE_PARALLEL    -- defined in H5config.h if we are building
##               a parallel library even if configure wasn't
##               able to find some header file or library that
##               might be required. This is defined if the
##               user explicitly states
##               that a parallel library is being built by supplying
##               the `--enable-parallel' configure switch.
##
##    PARALLEL        -- This variable is set to a non-null value if
##               we're building a parallel version of the library.
##
##    RUNSERIAL            -- This is a command which will be prepended to
##               the executable name to run the executable using
##               a single process. For serial versions of the
##               library this will normally be empty. For parallel
##               versions it might be something like `mpiexec -n 1'.
##               The value of this variable is substituted in *.in
##               files.
##
##    RUNPARALLEL    -- This is a command which will be prepended to
##               the executable name to run the executable on
##               multiple processors. For the serial library the
##               value will normally be the empty string. For
##               parallel library it should be something like
##               "mpiexec -n \$\${NPROCS:=6}" where NPROCS will
##               eventually contain the number of processors on which
##               to run the executable (the double dollarsigns are to
##               protect the expansion until make executes the
##               command).  The value of this variable is
##               substituted in *.in files.
##
AC_SUBST([PARALLEL])
AC_SUBST([RUNSERIAL])
AC_SUBST([RUNPARALLEL])
AC_SUBST([TESTPARALLEL])

## ----------------------------------------------------------------------
## Check if they would like the Java native interface (JNI) compiled
##

## This needs to be exposed for the library info file even if Java is disabled.
AC_SUBST([HDF_JAVA])

## Default is no Java
HDF_JAVA=no

AC_SUBST([H5_CLASSPATH]) H5_CLASSPATH=""
AC_MSG_CHECKING([if Java JNI interface enabled])

AC_ARG_ENABLE([java],
              [AS_HELP_STRING([--enable-java],
                              [Compile the Java JNI interface [default=no]])],
              [HDF_JAVA=$enableval])

if test "X$HDF_JAVA" = "Xyes"; then
  if test "X${enable_shared}" != "Xno"; then
    AC_MSG_RESULT([yes])
    if test "X$CLASSPATH" = "X"; then
      H5_CLASSPATH=".:$srcdir/java/lib"
    else
      H5_CLASSPATH=".:$CLASSPATH:$srcdir/java/lib"
    fi
    ## Checks for programs.
    AX_JAVA_OPTIONS
    H5_JAVACFLAGS=$JAVACFLAGS
    H5_JAVAFLAGS=$JAVAFLAGS
    AX_PROG_JAVAC
    AX_PROG_JAVA
    AX_PROG_JAR
    AX_PROG_JAVADOC
    ## Find the include directories needed for building JNI code
    AX_JNI_INCLUDE_DIR()
    for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS
    do
      JNIFLAGS="$JNIFLAGS -I$JNI_INCLUDE_DIR"
    done
    ## Find junit for testing the JNI code
    AX_CHECK_CLASSPATH()
    CLASSPATH_ENV=$H5_CLASSPATH
    AX_CHECK_JUNIT()
    AX_CHECK_JAVA_HOME

    AC_MSG_RESULT([yes])
  else
    AC_MSG_ERROR([Java requires shared libraries to be built])
    HDF_JAVA="no"
    AC_MSG_RESULT([no])
  fi
else
  AC_MSG_RESULT([no])
fi

## ----------------------------------------------------------------------
## Fortran libraries are not currently supported on Mac. Disable them.
## (this is overridable with --enable-unsupported).
##
AC_SUBST([H5_FORTRAN_SHARED])
H5_FORTRAN_SHARED="no"
if test "X${HDF_FORTRAN}" = "Xyes" && test "X${enable_shared}" != "Xno"; then
  AC_MSG_CHECKING([if shared Fortran libraries are supported])
  H5_FORTRAN_SHARED="yes"

  ## Report results of check(s)

  if test "X${H5_FORTRAN_SHARED}" = "Xno"; then
    AC_MSG_RESULT([no])
    AC_MSG_WARN([$CHECK_WARN])
    if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
      AC_MSG_WARN([Disabling shared Fortran libraries.])
      AC_MSG_WARN([To override this behavior, please use --enable-unsupported configure option.])
        if test "X${enable_static}" = "Xno"; then
          AC_MSG_ERROR([both static and shared Fortran libraries are disabled])
        fi
    else
      AC_MSG_WARN([Allowing unsupported Fortran shared libraries due to use of --enable-unsupported flag])
      H5_FORTRAN_SHARED="yes"
    fi
  else
    AC_MSG_RESULT([yes])
  fi
fi

AM_CONDITIONAL([FORTRAN_SHARED_CONDITIONAL], [test "X$H5_FORTRAN_SHARED" = "Xyes"])

## ----------------------------------------------------------------------
## Check if they would like to disable building tests
##

## This needs to be exposed for the library info file.
AC_SUBST([HDF5_TESTS])

## Default is to build tests
HDF5_TESTS=yes

AC_MSG_CHECKING([if building tests is disabled])

AC_ARG_ENABLE([tests],
              [AS_HELP_STRING([--enable-tests],
                              [Compile the HDF5 tests [default=yes]])],
              [HDF5_TESTS=$enableval])

AC_MSG_RESULT([$HDF5_TESTS])

## These need to be exposed for some tests.
AC_SUBST([H5_UTILS_TEST_BUILDDIR])
H5_UTILS_TEST_BUILDDIR='utils/test'
AC_SUBST([H5_TEST_BUILDDIR])
H5_TEST_BUILDDIR='test'

## ----------------------------------------------------------------------
## Check what level of testing should be enabled
##

## Default is quickest testing
TEST_EXPRESS_LEVEL_DEFAULT=3

AC_MSG_CHECKING([if HDF5 testing intensity level is set])

AC_ARG_ENABLE([test-express],
              [AS_HELP_STRING([--enable-test-express=(0-3)],
                              [Set HDF5 testing intensity level (0-3) [0 = exhaustive testing; 3 = quicker testing; default=3] Set environment variable HDF5TestExpress to override configured setting])],
              [TEST_EXPRESS_LEVEL_DEFAULT=$enableval])

case "X-$TEST_EXPRESS_LEVEL_DEFAULT" in
  X-0|X-1|X-2|X-3)
    AC_MSG_RESULT([$TEST_EXPRESS_LEVEL_DEFAULT])
    ;;
  *)
    AC_MSG_RESULT([error])
    AC_MSG_ERROR([$TEST_EXPRESS_LEVEL_DEFAULT is not a valid test express level])
    ;;
esac

AC_DEFINE_UNQUOTED([TEST_EXPRESS_LEVEL_DEFAULT], [$TEST_EXPRESS_LEVEL_DEFAULT], [HDF5 testing intensity level])

## ----------------------------------------------------------------------
## Check if they would like to disable building tools
##

## This needs to be exposed for the library info file.
AC_SUBST([HDF5_TOOLS])

## Default is to build tests and tools
HDF5_TOOLS=yes

AC_MSG_CHECKING([if building tools is enabled])

AC_ARG_ENABLE([tools],
              [AS_HELP_STRING([--enable-tools],
                              [Compile the HDF5 tools [default=yes]])],
              [HDF5_TOOLS=$enableval])

AC_MSG_RESULT([$HDF5_TOOLS])

## ----------------------------------------------------------------------
## Check if they would like to disable building the high-level GIF
## tools (they have unfixed CVE issues)
##

AC_MSG_CHECKING([if the high-level GIF tools are enabled])
AC_ARG_ENABLE([hlgiftools],
     [AS_HELP_STRING([--enable-hlgiftools],
                     [Enable the high-level GIF tools. NOTE: These have unfixed CVE issues!
                     [default=no]
                     ])],
     [HDF5_HL_GIF_TOOLS=$enableval])

if test "X-$HDF5_TOOLS" = "X-yes" -a "X-$HDF5_HL" = "X-yes" -a "X-$HDF5_HL_GIF_TOOLS" = "X-yes"; then
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
  HDF5_HL_GIF_TOOLS="no"
fi


## ----------------------------------------------------------------------
## Check if they would like to enable building doxygen files
##

## This needs to be exposed for the library info file.
AC_SUBST([HDF5_DOXYGEN])

## Default is to not build DOXYGEN
HDF5_DOXYGEN=no

AC_MSG_CHECKING([if building doxygen is enabled])

AC_ARG_ENABLE([doxygen],
              [AS_HELP_STRING([--enable-doxygen],
                              [Compile the HDF5 doxygen files [default=no]])],
              [HDF5_DOXYGEN=$enableval])

AC_MSG_RESULT([$HDF5_DOXYGEN])

## Check if they would like to enable doxygen warnings as errors
##

## This needs to be exposed for the library info file.
AC_SUBST([HDF5_DOXY_WARNINGS])

## Default is not to consider doxygen warnings as errors
DOXY_ERR=yes

AC_MSG_CHECKING([if doxygen warnings as errors is enabled])

AC_ARG_ENABLE([doxygen-errors],
              [AS_HELP_STRING([--enable-doxygen-errors],
                              [Error on HDF5 doxygen warnings [default=no]])],
              [DOXY_ERR=$enableval])

if test "X$DOXY_ERR" = "Xyes"; then
    HDF5_DOXY_WARNINGS="FAIL_ON_WARNINGS"
else
    HDF5_DOXY_WARNINGS="NO"

fi
AC_MSG_RESULT([$HDF5_DOXY_WARNINGS])

if test "X$HDF5_DOXYGEN" = "Xyes"; then
  DX_DOXYGEN_FEATURE(ON)
  DX_DOT_FEATURE(OFF)
  DX_HTML_FEATURE(ON)
  DX_CHM_FEATURE(OFF)
  DX_CHI_FEATURE(OFF)
  DX_MAN_FEATURE(ON)
  DX_RTF_FEATURE(OFF)
  DX_XML_FEATURE(OFF)
  DX_PDF_FEATURE(OFF)
  DX_PS_FEATURE(OFF)

  AC_SUBST([DOXYGEN_PACKAGE])
  AC_SUBST([DOXYGEN_VERSION_STRING])
  AC_SUBST([DOXYGEN_DIR])
  AC_SUBST([DOXYGEN_INCLUDE_ALIASES])
  AC_SUBST([DOXYGEN_PROJECT_LOGO])
  AC_SUBST([DOXYGEN_PROJECT_BRIEF])
  AC_SUBST([DOXYGEN_INPUT_DIRECTORY])
  AC_SUBST([DOXYGEN_OPTIMIZE_OUTPUT_FOR_C])
  AC_SUBST([DOXYGEN_MACRO_EXPANSION])
  AC_SUBST([DOXYGEN_OUTPUT_DIRECTORY])
  AC_SUBST([DOXYGEN_EXAMPLES_DIRECTORY])
  AC_SUBST([DOXYGEN_LAYOUT_FILE])
  AC_SUBST([DOXYGEN_HTML_HEADER])
  AC_SUBST([DOXYGEN_HTML_FOOTER])
  AC_SUBST([DOXYGEN_HTML_EXTRA_STYLESHEET])
  AC_SUBST([DOXYGEN_HTML_EXTRA_FILES])
  AC_SUBST([DOXYGEN_TAG_FILE])
  AC_SUBST([DOXYGEN_SERVER_BASED_SEARCH])
  AC_SUBST([DOXYGEN_EXTERNAL_SEARCH])
  AC_SUBST([DOXYGEN_SEARCHENGINE_URL])
  AC_SUBST([DOXYGEN_STRIP_FROM_PATH])
  AC_SUBST([DOXYGEN_STRIP_FROM_INC_PATH])
  AC_SUBST([DOXYGEN_PREDEFINED])

# SRCDIR Environment variables used inside doxygen macro for the source location:
  DOXYGEN_PACKAGE=${PACKAGE_NAME}
  DOXYGEN_VERSION_STRING=${PACKAGE_VERSION}
  DOXYGEN_DIR='$(SRCDIR)/doxygen'
  DOXYGEN_INCLUDE_ALIASES_PATH='$(SRCDIR)/doxygen'
  DOXYGEN_INCLUDE_ALIASES='$(SRCDIR)/doxygen/aliases'
  DOXYGEN_VERBATIM_VARS='DOXYGEN_INCLUDE_ALIASES'
  DOXYGEN_PROJECT_LOGO='$(SRCDIR)/doxygen/img/HDFG-logo.png'
  DOXYGEN_PROJECT_BRIEF='API Reference'
  DOXYGEN_INPUT_DIRECTORY='$(SRCDIR) $(SRCDIR)/doxygen/dox'
  DOXYGEN_OPTIMIZE_OUTPUT_FOR_C=YES
  DOXYGEN_MACRO_EXPANSION=YES
  DOXYGEN_OUTPUT_DIRECTORY=hdf5lib_docs
  DOXYGEN_EXAMPLES_DIRECTORY='$(SRCDIR)/doxygen/dox/cookbook $(SRCDIR)/doxygen/examples $(SRCDIR)/src $(SRCDIR)/examples $(SRCDIR)/test'
  DOXYGEN_LAYOUT_FILE='$(SRCDIR)/doxygen/hdf5doxy_layout.xml'
  DOXYGEN_HTML_HEADER='$(SRCDIR)/doxygen/hdf5_header.html'
  DOXYGEN_HTML_FOOTER='$(SRCDIR)/doxygen/hdf5_footer.html'
  DOXYGEN_HTML_EXTRA_STYLESHEET='$(SRCDIR)/doxygen/hdf5doxy.css'
  DOXYGEN_HTML_EXTRA_FILES='$(SRCDIR)/doxygen/hdf5_navtree_hacks.js'
  DOXYGEN_TAG_FILE=hdf5.tag
  DOXYGEN_SERVER_BASED_SEARCH=NO
  DOXYGEN_EXTERNAL_SEARCH=NO
  DOXYGEN_SEARCHENGINE_URL=
  DOXYGEN_STRIP_FROM_PATH='$(SRCDIR)'
  DOXYGEN_STRIP_FROM_INC_PATH='$(SRCDIR)'
  DOXYGEN_PREDEFINED='H5_HAVE_DIRECT H5_HAVE_LIBHDFS H5_HAVE_MAP_API H5_HAVE_PARALLEL H5_HAVE_ROS3_VFD H5_DOXYGEN H5_HAVE_SUBFILING_VFD H5_HAVE_IOC_VFD H5_HAVE_MIRROR_VFD'
  DOXYGEN_WARN_AS_ERROR=${HDF5_DOXY_WARNINGS}

  DX_INIT_DOXYGEN([HDF5], [./doxygen/Doxyfile], [hdf5lib_docs])
fi


## ----------------------------------------------------------------------
## Create libtool.  If shared/static libraries are going to be enabled
## or disabled, it should happen before these macros.
LT_PREREQ([2.2])

## ----------------------------------------------------------------------
## dlopen - This will use an improved version of libtool
## win32-dll - This will build clean dlls on win32 platforms.
LT_INIT([dlopen,win32-dll])

## ----------------------------------------------------------------------
## Check if we should install only statically linked executables.
##   This check needs to occur after libtool is initialized because
##   we check a libtool cache value and may issue a warning based
##   on its result.
AC_SUBST([STATIC_EXEC])

## Default is no
STATIC_EXEC=no

AC_MSG_CHECKING([if we should install only statically linked executables])
AC_ARG_ENABLE([static_exec],
              [AS_HELP_STRING([--enable-static-exec],
                              [Install only statically linked executables
                               [default=no]])],
              [STATIC_EXEC=$enableval])
AC_MSG_RESULT([$STATIC_EXEC])

if test "X$STATIC_EXEC" = "Xyes"; then
  ## Issue a warning if -static flag is not supported.
  if test "X$lt_cv_prog_compiler_static_works" = "Xno"; then
    AC_MSG_WARN([-static flag not supported on this system; executable won't statically link shared system libraries.])
    LT_STATIC_EXEC=""
  else
    LT_STATIC_EXEC="-all-static"
  fi
else
  LT_STATIC_EXEC=""
fi
AM_CONDITIONAL([USE_PLUGINS_CONDITIONAL], [test "X$LT_STATIC_EXEC" = X])

AC_SUBST([LT_STATIC_EXEC])

## Fix up the INSTALL macro if it's a relative path. We want the
## full-path to the binary instead.
case "$INSTALL" in
  *install-sh*)
    INSTALL='\${top_srcdir}/bin/install-sh -c'
    ;;
esac

## ----------------------------------------------------------------------
## Some users have reported problems with libtool's use of '-Wl,-rpath' to
## link shared libraries in nondefault directories. Allow users to
## disable embedding the rpath information in the executables and to
## instead solely rely on the information in LD_LIBRARY_PATH.
AC_MSG_CHECKING([if -Wl,-rpath should be used to link shared libs in nondefault directories])
AC_ARG_ENABLE([sharedlib-rpath],
              [AS_HELP_STRING([--disable-sharedlib-rpath],
               [Disable use of the '=Wl,-rpath' linker option])],
              [RPATH=$enableval])

case "X-$RPATH" in
  X-no)
    AC_MSG_RESULT([no])
    runpath_var=
    hardcode_libdir_flag_spec=
    hardcode_libdir_flag_spec_ld=
    hardcode_into_libs=no
    ;;
  X-|X-yes)
    AC_MSG_RESULT([yes])
    ;;
  *)
    AC_MSG_RESULT([error])
    AC_MSG_ERROR([\'$enableval\' is not a valid rpath type])
    ;;
esac

## ----------------------------------------------------------------------
## Check for system libraries. "dl" stands for dynamically loaded library
##
AC_CHECK_LIB([m], [ceil])
AC_CHECK_LIB([dl], [dlopen])

## ----------------------------------------------------------------------
## Check for system header files.
##

## Unix
AC_CHECK_HEADERS([dirent.h features.h pwd.h unistd.h])
AC_CHECK_HEADERS([sys/file.h sys/ioctl.h sys/resource.h])
AC_CHECK_HEADERS([sys/stat.h sys/time.h sys/types.h])

## Darwin
AC_SUBST([H5_IS_DARWIN])
H5_IS_DARWIN="no"
case $host_os in
  darwin*)
    AC_DEFINE([HAVE_DARWIN], [1], [Define if Darwin or Mac OS X])
    H5_IS_DARWIN="yes"
    ;;
esac

## Windows
case "`uname`" in
  MINGW*)
    # The Winsock library
    AC_CHECK_LIB([ws2_32], [GetUserName])
    ;;
esac

# Mirror VFD networking
AC_CHECK_HEADERS([arpa/inet.h netdb.h netinet/in.h sys/socket.h])

## ----------------------------------------------------------------------
## Some platforms require that all symbols are resolved when a library
## is linked. We can use the -no-undefined flag to tell libtool that
## it will be able to build shared libraries on these architectures,
## as it will not do so by default.
##
if test "X${enable_shared}" = "Xyes"; then
  AC_MSG_CHECKING([if libtool needs -no-undefined flag to build shared libraries])
  case "`uname`" in
    CYGWIN*|MINGW*|AIX*)
      ## Add in the -no-undefined flag to LDFLAGS for libtool.
      AC_MSG_RESULT([yes])
      H5_LDFLAGS="$H5_LDFLAGS -no-undefined"
      ;;
    *)
      ## Don't add in anything.
      AC_MSG_RESULT([no])
      ;;
  esac
fi

## ----------------------------------------------------------------------
## Set up large file support

AC_SYS_LARGEFILE

## ----------------------------------------------------------------------
## Add necessary defines for Linux Systems.
##
case "$host_cpu-$host_vendor-$host_os" in
  *linux*)
    ## Add POSIX support on Linux systems, so <features.h> defines
    ## __USE_POSIX, which is required to get the prototype for fdopen
    ## defined correctly in <stdio.h>.
    ##
    ## This flag was removed from h5cc as of 2009-10-17 when it was found
    ## that the flag broke compiling netCDF-4 code with h5cc, but kept in
    ## H5_CPPFLAGS because fdopen and HDfdopen fail without it. HDfdopen
    ## is used only by H5_debug_mask which is used only when debugging in
    ## H5_init_library (all in H5.c).  When the flag was removed this was
    ## the only compile failure noted.
    ##
    ## This was originally defined as _POSIX_SOURCE which was updated to
    ## _POSIX_C_SOURCE=199506L to expose a greater amount of POSIX
    ## functionality so clock_gettime and CLOCK_MONOTONIC are defined
    ## correctly. This was later updated to 200112L so that
    ## posix_memalign() is visible for the direct VFD code on Linux
    ## systems. Even later, this was changed to 200809L to support
    ## pread/pwrite in VFDs.
    ##
    ## POSIX feature information can be found in the gcc manual at:
    ## http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
    H5_CPPFLAGS="-D_POSIX_C_SOURCE=200809L $H5_CPPFLAGS"

    ## Need to add this so that O_DIRECT is visible for the direct
    ## VFD on Linux systems.
    H5_CPPFLAGS="-D_GNU_SOURCE $H5_CPPFLAGS"
    ;;
  *mingw*)
    AC_DEFINE([HAVE_WINDOWS], [1], [Define if this is a Windows machine])
    AC_DEFINE([HAVE_WIN32_API], [1], [Define if on the Windows platform using the Win32 API])
    AC_DEFINE([HAVE_MINGW], [1], [Define if using MinGW])
    H5_CPPFLAGS="-D_GNU_SOURCE -D__USE_MINGW_ANSI_STDIO $H5_CPPFLAGS"
    ;;
  *cygwin*)
    AC_DEFINE([HAVE_CYGWIN], [1], [Define if using Cygwin])
    H5_CPPFLAGS="-D_GNU_SOURCE $H5_CPPFLAGS"
    ;;
esac

## Need to add the AM_ and H5_ into CFLAGS/CPPFLAGS to make them visible
## for configure checks.
## Note: Both will be restored by the end of configure.
CPPFLAGS="$H5_CPPFLAGS $AM_CPPFLAGS $CPPFLAGS"
CFLAGS="$H5_CFLAGS $AM_CFLAGS $CFLAGS"

## Checkpoint the cache
AC_CACHE_SAVE

AC_CHECK_SIZEOF(        [int8_t])
AC_CHECK_SIZEOF(       [uint8_t])
AC_CHECK_SIZEOF(  [int_least8_t])
AC_CHECK_SIZEOF( [uint_least8_t])
AC_CHECK_SIZEOF(   [int_fast8_t])
AC_CHECK_SIZEOF(  [uint_fast8_t])

AC_CHECK_SIZEOF(       [int16_t])
AC_CHECK_SIZEOF(      [uint16_t])
AC_CHECK_SIZEOF( [int_least16_t])
AC_CHECK_SIZEOF([uint_least16_t])
AC_CHECK_SIZEOF(  [int_fast16_t])
AC_CHECK_SIZEOF( [uint_fast16_t])

AC_CHECK_SIZEOF(       [int32_t])
AC_CHECK_SIZEOF(      [uint32_t])
AC_CHECK_SIZEOF( [int_least32_t])
AC_CHECK_SIZEOF([uint_least32_t])
AC_CHECK_SIZEOF(  [int_fast32_t])
AC_CHECK_SIZEOF( [uint_fast32_t])

AC_CHECK_SIZEOF(       [int64_t])
AC_CHECK_SIZEOF(      [uint64_t])
AC_CHECK_SIZEOF( [int_least64_t])
AC_CHECK_SIZEOF([uint_least64_t])
AC_CHECK_SIZEOF(  [int_fast64_t])
AC_CHECK_SIZEOF( [uint_fast64_t])

AC_CHECK_SIZEOF([bool], [], [#include <stdbool.h>])
AC_CHECK_SIZEOF([off_t])
AC_CHECK_SIZEOF([ptrdiff_t])
AC_CHECK_SIZEOF([size_t])
AC_CHECK_SIZEOF([ssize_t])
AC_CHECK_SIZEOF([time_t], [], [#include <time.h>])

## Checkpoint the cache
AC_CACHE_SAVE

## ----------------------------------------------------------------------
## Check if the dev_t type is a scalar type (must come after the check for
## sys/types.h)
AC_MSG_CHECKING([if dev_t is scalar])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
  ]],
  [[dev_t d1, d2; if(d1==d2) return 0;]])],
  [AC_DEFINE([DEV_T_IS_SCALAR], [1],
            [Define if dev_t is a scalar])
  AC_MSG_RESULT([yes])],
  [AC_MSG_RESULT([no])])

## ----------------------------------------------------------------------
## Fake --with-xxx option to allow us to create a help message for the
## following --with-xxx options which can take either a =DIR or =INC,LIB
## specifier.
##
AC_ARG_WITH([fnord],
  [
 For the following --with-xxx options, you can specify where the header
 files and libraries are in two different ways:

    --with-xxx=INC,LIB - Specify individually the include directory and
                         library directory separated by a comma
    --with-xxx=DIR     - Specify only the directory which contains the
                         include/ and lib/ subdirectories
  ])

## ----------------------------------------------------------------------
## Make the external filters list available to *.in files
## At this point it's unset (no external filters by default) but it
## will be filled in during the deflate/zlib and szip/libaec processing
## below.
##
AC_SUBST([EXTERNAL_FILTERS])

## ----------------------------------------------------------------------
## Is the GNU zlib present? It has a header file `zlib.h' and a library
## `-lz' and their locations might be specified with the `--with-zlib'
## command-line switch. The value is an include path and/or a library path.
## If the library path is specified then it must be preceded by a comma.
##
AC_SUBST([USE_FILTER_DEFLATE]) USE_FILTER_DEFLATE="no"
AC_ARG_WITH([zlib],
            [AS_HELP_STRING([--with-zlib=DIR],
                            [Use zlib library for external deflate I/O
                             filter [default=yes]])],,
            [withval=yes])

case "X-$withval" in
  X-yes)
    HAVE_ZLIB="yes"
    AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H="yes"], [unset HAVE_ZLIB])
    if test "x$HAVE_ZLIB" = "xyes" -a "x$HAVE_ZLIB_H" = "xyes"; then
      AC_CHECK_LIB([z], [compress2],, [unset HAVE_ZLIB])
    fi
    if test -z "$HAVE_ZLIB"; then
      if test -n "$HDF5_CONFIG_ABORT"; then
        AC_MSG_ERROR([couldn't find zlib library])
      fi
    else
      AC_CHECK_FUNC([compress2], [HAVE_COMPRESS2="yes"])
    fi
    ;;
  X-|X-no|X-none)
    HAVE_ZLIB="no"
    AC_MSG_CHECKING([for zlib])
    AC_MSG_RESULT([suppressed])
    ;;
  *)
    HAVE_ZLIB="yes"
    case "$withval" in
      *,*)
        zlib_inc="`echo $withval | cut -f1 -d,`"
        zlib_lib="`echo $withval | cut -f2 -d, -s`"
        ;;
      *)
        if test -n "$withval"; then
          zlib_inc="$withval/include"
          zlib_lib="$withval/lib"
        fi
        ;;
    esac

    saved_CPPFLAGS="$CPPFLAGS"
    saved_AM_CPPFLAGS="$AM_CPPFLAGS"
    saved_LDFLAGS="$LDFLAGS"
    saved_AM_LDFLAGS="$AM_LDFLAGS"

    if test -n "$zlib_inc"; then
      CPPFLAGS="$CPPFLAGS -I$zlib_inc"
      AM_CPPFLAGS="$AM_CPPFLAGS -I$zlib_inc"
    fi

    AC_CHECK_HEADERS([zlib.h],
                     [HAVE_ZLIB_H="yes"],
                     [CPPFLAGS="$saved_CPPFLAGS"; AM_CPPFLAGS="$saved_AM_CPPFLAGS"] [unset HAVE_ZLIB])

    if test -n "$zlib_lib"; then
      LDFLAGS="$LDFLAGS -L$zlib_lib"
      AM_LDFLAGS="$AM_LDFLAGS -L$zlib_lib"
    fi

    if test "x$HAVE_ZLIB" = "xyes" -a "x$HAVE_ZLIB_H" = "xyes"; then
      AC_CHECK_LIB([z], [compress2],,
                   [LDFLAGS="$saved_LDFLAGS"; AM_LDFLAGS="$saved_AM_LDFLAGS"; unset HAVE_ZLIB])
    fi

    if test -z "$HAVE_ZLIB"; then
      if test -n "$HDF5_CONFIG_ABORT"; then
        AC_MSG_ERROR([couldn't find zlib library])
      fi
    else
      AC_CHECK_FUNC([compress2], [HAVE_COMPRESS2="yes"])
    fi
    ;;
esac

if test "x$HAVE_ZLIB" = "xyes" -a "x$HAVE_ZLIB_H" = "xyes" -a "x$HAVE_COMPRESS2" = "xyes"; then
  AC_DEFINE([HAVE_FILTER_DEFLATE], [1], [Define if support for deflate (zlib) filter is enabled])
  USE_FILTER_DEFLATE="yes"

  ## Add "deflate" to external filter list
  if test "X$EXTERNAL_FILTERS" != "X"; then
    EXTERNAL_FILTERS="${EXTERNAL_FILTERS},"
  fi
    EXTERNAL_FILTERS="${EXTERNAL_FILTERS}deflate(zlib)"
fi


## ----------------------------------------------------------------------
## Is the szlib present? It has a header file `szlib.h' and a library
## `-lsz' and their locations might be specified with the `--with-szlib'
## command-line switch. The value is an include path and/or a library path.
## If the library path is specified then it must be preceded by a comma.
##
## libaec also implements Space Data System Standard 121.0-B-2 and has
## an szip compatibility header. Since the AEC library is BSD licensed
## for both encoding and decoding, we now build with the filter enabled
## by default when the library is found.
##
AC_SUBST([LL_PATH])
AC_SUBST([USE_FILTER_SZIP]) USE_FILTER_SZIP="no"
AC_ARG_WITH([szlib],
            [AS_HELP_STRING([--with-szlib=DIR],
                            [Use szlib library for external szlib I/O
                             filter [default=yes]])],,
            [withval=yes])

case "X-$withval" in
  X-yes)
    HAVE_SZLIB="yes"
    AC_CHECK_HEADERS([szlib.h], [HAVE_SZLIB_H="yes"], [unset HAVE_SZLIB])
    if test "x$HAVE_SZLIB" = "xyes" -a "x$HAVE_SZLIB_H" = "xyes"; then
      AC_CHECK_LIB([sz], [SZ_BufftoBuffCompress],, [unset HAVE_SZLIB])
    fi
    if test -z "$HAVE_SZLIB" -a -n "$HDF5_CONFIG_ABORT"; then
      AC_MSG_ERROR([couldn't find szlib library])
    fi
    ;;
  X-|X-no|X-none)
    HAVE_SZLIB="no"
    AC_MSG_CHECKING([for szlib])
    AC_MSG_RESULT([suppressed])
    ;;
  *)
    HAVE_SZLIB="yes"
    case "$withval" in
      *,*)
        szlib_inc="`echo $withval |cut -f1 -d,`"
        szlib_lib="`echo $withval |cut -f2 -d, -s`"
        ;;
      *)
        if test -n "$withval"; then
          szlib_inc="$withval/include"
          szlib_lib="$withval/lib"
        fi
        ;;
    esac

    saved_CPPFLAGS="$CPPFLAGS"
    saved_AM_CPPFLAGS="$AM_CPPFLAGS"
    saved_LDFLAGS="$LDFLAGS"
    saved_AM_LDFLAGS="$AM_LDFLAGS"

    if test -n "$szlib_inc"; then
      CPPFLAGS="$CPPFLAGS -I$szlib_inc"
      AM_CPPFLAGS="$AM_CPPFLAGS -I$szlib_inc"
    fi

    if test -n "$szlib_lib"; then
      LDFLAGS="$LDFLAGS -L$szlib_lib"
      AM_LDFLAGS="$AM_LDFLAGS -L$szlib_lib"
    fi

    if test "x$HAVE_SZLIB" = "xyes"; then
      AC_CHECK_LIB([sz], [SZ_BufftoBuffCompress],,
                   [CPPFLAGS="$saved_CPPFLAGS"; AM_CPPFLAGS="$saved_AM_CPPFLAGS"; LDFLAGS="$saved_LDFLAGS"; AM_LDFLAGS="$saved_AM_LDFLAGS"; unset HAVE_SZLIB])
      if test -n "$HAVE_SZLIB"; then
        AC_CHECK_HEADERS([szlib.h],
                         [HAVE_SZLIB_H="yes"],
                         [CPPFLAGS="$saved_CPPFLAGS"; AM_CPPFLAGS="$saved_AM_CPPFLAGS"] [unset HAVE_SZLIB])
      else
        AC_MSG_RESULT([Using SZ_BufftoBuffCompress from libsz in $szlib_lib failed.  Szip not enabled.])
      fi
    fi

    if test -z "$HAVE_SZLIB" -a -n "$HDF5_CONFIG_ABORT"; then
      AC_MSG_ERROR([couldn't find szlib library])
    fi
    ;;
esac

if test "x$HAVE_SZLIB" = "xyes" -a "x$HAVE_SZLIB_H" = "xyes"; then
  ## SZLIB library is available.  Check if it can encode
  AC_MSG_CHECKING([for szlib encoder])

  ## Set LD_LIBRARY_PATH so encoder test can find the library and run.
  ## Also add LL_PATH substitution to Makefiles so they can use the
  ## path as well, for testing examples.
  if test -z "$LD_LIBRARY_PATH"; then
    export LD_LIBRARY_PATH="$szlib_lib"
  else
    export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$szlib_lib"
  fi

  LL_PATH="$LD_LIBRARY_PATH"

  # CROSS-COMPILING: Assume 'yes' now that libaec is so prevalent
  AC_CACHE_VAL([hdf5_cv_szlib_can_encode],
        [AC_RUN_IFELSE(
            [AC_LANG_PROGRAM([
                #include "szlib.h"
            ],[[
                /* SZ_encoder_enabled returns 1 if encoder is present */
                return SZ_encoder_enabled() != 1;
            ]])]
        , [hdf5_cv_szlib_can_encode=yes], [hdf5_cv_szlib_can_encode=no], [hdf5_cv_szlib_can_encode=yes])]
   )

  AC_DEFINE([HAVE_FILTER_SZIP], [1],
            [Define if support for szip filter is enabled])
  USE_FILTER_SZIP="yes"

  if test ${hdf5_cv_szlib_can_encode} = "yes"; then
    AC_MSG_RESULT([yes])
  fi
  if test ${hdf5_cv_szlib_can_encode} = "no"; then
    AC_MSG_RESULT([no])
  fi

  ## Add "szip" to external filter list
  if test ${hdf5_cv_szlib_can_encode} = "yes"; then
    if test "X$EXTERNAL_FILTERS" != "X"; then
      EXTERNAL_FILTERS="${EXTERNAL_FILTERS},"
    fi
      EXTERNAL_FILTERS="${EXTERNAL_FILTERS}szip(encoder)"
  fi
  if test ${hdf5_cv_szlib_can_encode} = "no"; then
    if test "X$EXTERNAL_FILTERS" != "X"; then
      EXTERNAL_FILTERS="${EXTERNAL_FILTERS},"
    fi
      EXTERNAL_FILTERS="${EXTERNAL_FILTERS}szip(no encoder)"
  fi
fi

AM_CONDITIONAL([BUILD_SHARED_SZIP_CONDITIONAL], [test "X$USE_FILTER_SZIP" = "Xyes" && test "X$LL_PATH" != "X"])

## Checkpoint the cache
AC_CACHE_SAVE

## ----------------------------------------------------------------------
## Enable thread-safe version of library.  It requires Pthreads support
## on POSIX systems.
##
AC_SUBST([THREADSAFE])

## Default is no thread-safety
THREADSAFE=no

AC_MSG_CHECKING([for thread safe support])
AC_ARG_ENABLE([threadsafe],
              [AS_HELP_STRING([--enable-threadsafe],
                              [Enable thread-safe capability. Not compatible with the high-level library, Fortran, or C++ wrappers.
                              [default=no]])],
              [THREADSAFE=$enableval])

## The high-level, C++, Fortran and Java interfaces are not compatible
## with the thread-safety option because the lock is not hoisted
## into the higher-level API calls.

## --enable-threadsafe is incompatible with --enable-hl unless
## --enable-unsupported has been specified on the configure line.
##
## Note that the high-level library is enabled by default so most
## users will have to add --disable-hl to the configure options.
if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
  if test "X${HDF5_HL}" = "Xyes" -a "X${enable_threadsafe}" = "Xyes"; then
    AC_MSG_ERROR([The thread-safe library is incompatible with the high-level library. --disable-hl can be used to prevent building the high-level library (recommended). Alternatively, --enable-unsupported will allow building the high-level library, though this configuration is not supported by The HDF Group.])
  fi
fi

## The --enable-threadsafe flag is not compatible with --enable-cxx.
## If the user tried to specify both flags, throw an error, unless
## they also provided the --enable-unsupported flag.
if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
  if test "X${HDF_CXX}" = "Xyes" -a "X${enable_threadsafe}" = "Xyes"; then
    AC_MSG_ERROR([--enable-cxx and --enable-threadsafe flags are incompatible. Use --enable-unsupported to override this error.])
  fi
fi

## --enable-threadsafe is also incompatible with --enable-fortran unless
## --enable-unsupported has been specified on the configure line.
if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
  if test "X${HDF_FORTRAN}" = "Xyes" -a "X${enable_threadsafe}" = "Xyes"; then
    AC_MSG_ERROR([--enable-fortran and --enable-threadsafe flags are incompatible. Use --enable-unsupported to override this error.])
  fi
fi

## --enable-threadsafe is also incompatible with --enable-java unless
## --enable-unsupported has been specified on the configure line.
if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
  if test "X${HDF_JAVA}" = "Xyes" -a "X${enable_threadsafe}" = "Xyes"; then
    AC_MSG_ERROR([--enable-java and --enable-threadsafe flags are incompatible. Use --enable-unsupported to override this error.])
  fi
fi


case "X-$THREADSAFE" in
  X-|X-no)
    AC_MSG_RESULT([no])
    ;;
  X-yes)
    THREADSAFE=yes
    AC_MSG_RESULT([yes])
    ;;
  *)
    AC_MSG_RESULT([error])
    AC_MSG_ERROR([\'$enableval\' is not a valid threadsafe type])
    ;;
esac

if test "X$THREADSAFE" = "Xyes"; then
    AC_DEFINE([HAVE_THREADSAFE], [1], [Define if we have thread safe support])

    ## ----------------------------------------------------------------------
    ## Is the Pthreads library present?  It has a header file `pthread.h' and
    ## a library `-lpthread' and their locations might be specified with the
    ## `--with-pthread' command-line switch.  The value is an include path
    ## and/or a library path.  If the library path is specified then it must
    ## be preceded by a comma.
    ##
    ## Thread-safety in HDF5 only uses Pthreads via configure, so the
    ## default is "check", though this only has an effect when
    ## --enable-threadsafe is specified.
    AC_SUBST([HAVE_PTHREAD]) HAVE_PTHREAD=yes
    AC_ARG_WITH([pthread],
                [AS_HELP_STRING([--with-pthread=DIR],
                                [Specify alternative path to Pthreads library when
                                thread-safe capability is built.])],,
                [withval=check])

    case "$withval" in
      check | yes)
        AC_CHECK_HEADERS([pthread.h],, [unset HAVE_PTHREAD])
        if test "x$HAVE_PTHREAD" = "xyes"; then
          AC_CHECK_LIB([pthread], [pthread_self],, [unset HAVE_PTHREAD])
        fi
        ;;
      no)
        AC_MSG_ERROR([Must use Pthreads with thread safety])
        ;;
      *)
        case "$withval" in
          *,*)
            pthread_inc="`echo $withval | cut -f1 -d,`"
            pthread_lib="`echo $withval | cut -f2 -d, -s`"
            ;;
          *)
            if test -n "$withval"; then
              pthread_inc="$withval/include"
              pthread_lib="$withval/lib"
            fi
            ;;
        esac

        if test -n "$pthread_inc"; then
          saved_CPPFLAGS="$CPPFLAGS"
          saved_AM_CPPFLAGS="$AM_CPPFLAGS"
          CPPFLAGS="$CPPFLAGS -I$pthread_inc"
          AM_CPPFLAGS="$AM_CPPFLAGS -I$pthread_inc"
          AC_CHECK_HEADERS([pthread.h],, [CPPFLAGS="$saved_CPPFLAGS"; AM_CPPFLAGS="$saved_AM_CPPFLAGS"; unset HAVE_PTHREAD])
        else
          AC_CHECK_HEADERS([pthread.h],, [unset HAVE_PTHREAD])
        fi

        if test "x$HAVE_PTHREAD" = "xyes"; then
          if test -n "$pthread_lib"; then
            saved_LDFLAGS="$LDFLAGS"
            saved_AM_LDFLAGS="$AM_LDFLAGS"
            LDFLAGS="$LDFLAGS -L$pthread_lib"
            AM_LDFLAGS="$AM_LDFLAGS -L$pthread_lib"
            AC_CHECK_LIB([pthread], [pthread_self],,
                         [LDFLAGS="$saved_LDFLAGS"; AM_LDFLAGS="$saved_AM_LDFLAGS"; unset HAVE_PTHREAD])
          else
            AC_CHECK_LIB([pthread], [pthread_self],, [unset HAVE_PTHREAD])
          fi
        fi
        ;;
    esac

    ## ----------------------------------------------------------------------
    ## Check if pthread_attr_setscope(&attribute, PTHREAD_SCOPE_SYSTEM)
    ## is supported on this system
    ##
    ## Unfortunately, this probably needs to be an AC_RUN_IFELSE since
    ## it's impossible to determine if PTHREAD_SCOPE_SYSTEM is
    ## supported a priori. POSIX.1-2001 requires that a conformant
    ## system need only support one of SYSTEM or PROCESS scopes.
    ##
    ## CROSS-COMPILING: Use a pessimistic 'no'. You can hand-hack the config
    ##                  file if you know otherwise.
    AC_MSG_CHECKING([Pthreads supports system scope])
    AC_CACHE_VAL([hdf5_cv_system_scope_threads],
      [AC_RUN_IFELSE(
        [AC_LANG_PROGRAM([
            #include <stdlib.h>
            #include <pthread.h>
        ],[
              pthread_attr_t attribute;
              int ret;

              pthread_attr_init(&attribute);
              ret=pthread_attr_setscope(&attribute, PTHREAD_SCOPE_SYSTEM);
              exit(ret==0 ? 0 : 1);
        ])]
      , [hdf5_cv_system_scope_threads=yes], [hdf5_cv_system_scope_threads=no], [hdf5_cv_system_scope_threads=no])])

    if test ${hdf5_cv_system_scope_threads} = "yes"; then
      AC_DEFINE([SYSTEM_SCOPE_THREADS], [1],
                [Define if your system supports pthread_attr_setscope(&attribute, PTHREAD_SCOPE_SYSTEM) call.])
      AC_MSG_RESULT([yes])
    else
      AC_MSG_RESULT([no])
      AC_MSG_NOTICE([Always 'no' if cross-compiling. Edit the config file if your platform supports pthread_attr_setscope(&attribute, PTHREAD_SCOPE_SYSTEM).])
    fi
fi

## ----------------------------------------------------------------------
## Check for MONOTONIC_TIMER support (used in clock_gettime).  This has
## to be done after any POSIX defines to ensure that the test gets
## the correct POSIX level on linux.
AC_CHECK_DECL([CLOCK_MONOTONIC],[have_clock_monotonic="yes"],[have_clock_monotonic="no"],[[#include <time.h>]])

## ----------------------------------------------------------------------
## How does one figure out the local time zone?  Anyone know of a
## Posix way to do this?
##

## First check if `struct tm' has a `tm_gmtoff' member.
AC_MSG_CHECKING([for tm_gmtoff in struct tm])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  #include <sys/time.h>
  #include <time.h>
]], [[struct tm tm; tm.tm_gmtoff=0;]])],
  [AC_DEFINE([HAVE_TM_GMTOFF], [1],
          [Define if tm_gmtoff is a member of struct tm])
    AC_MSG_RESULT([yes])],
  [AC_MSG_RESULT([no])])

## Check whether the global variable `timezone' is defined.
AC_MSG_CHECKING([for global timezone variable])

case "`uname`" in
  CYGWIN*)
    AC_MSG_RESULT([disabled in CYGWIN])
    ;;
  *)
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
    #include <sys/time.h>
    #include <time.h>]], [[timezone=0;]])],
    [AC_DEFINE([HAVE_TIMEZONE], [1],
              [Define if timezone is a global variable])
      AC_MSG_RESULT([yes])],
    [AC_MSG_RESULT([no])])
    ;;
esac


## ----------------------------------------------------------------------
## Does the struct stat have the st_blocks field? This field is not POSIX.
##
AC_MSG_CHECKING([for st_blocks in struct stat])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  #include <sys/stat.h>]],[[struct stat sb; sb.st_blocks=0;]])],
  [AC_DEFINE([HAVE_STAT_ST_BLOCKS], [1],
          [Define if struct stat has the st_blocks field])
    AC_MSG_RESULT([yes])],
  [AC_MSG_RESULT([no])])

## ----------------------------------------------------------------------
## How do we figure out the width of a tty in characters?
##
AC_CHECK_FUNCS([_getvideoconfig gettextinfo])
case "`uname`" in
  CYGWIN*)
    ;;
  *)
    AC_CHECK_FUNCS([GetConsoleScreenBufferInfo])
    ;;
esac
AC_CHECK_FUNCS([_scrsize ioctl])

AC_MSG_CHECKING([for struct videoconfig])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],[[struct videoconfig w; w.numtextcols=0;]])],
  [AC_DEFINE([HAVE_STRUCT_VIDEOCONFIG], [1],
          [Define if struct videoconfig is defined])
    AC_MSG_RESULT([yes])],
  [AC_MSG_RESULT([no])])

AC_MSG_CHECKING([for struct text_info])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[struct text_info w; w.screenwidth=0;]])],
  [AC_DEFINE([HAVE_STRUCT_TEXT_INFO], [1],
          [Define if struct text_info is defined])
    AC_MSG_RESULT([yes])],
  [AC_MSG_RESULT([no])])

AC_MSG_CHECKING([for TIOCGWINSZ])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/ioctl.h>
]],[[int w=TIOCGWINSZ;]])],
  [AC_DEFINE([HAVE_TIOCGWINSZ], [1],
          [Define if the ioctl TIOGWINSZ is defined])
    AC_MSG_RESULT([yes])],
  [AC_MSG_RESULT([no])])

AC_MSG_CHECKING([for TIOCGETD])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/ioctl.h>
]],[[int w=TIOCGETD;]])],
  [AC_DEFINE([HAVE_TIOCGETD], [1],
          [Define if the ioctl TIOCGETD is defined])
    AC_MSG_RESULT([yes])],
  [AC_MSG_RESULT([no])])


## ----------------------------------------------------------------------
## Check for functions.
##
## NOTE: clock_gettime may require linking to the rt or posix4 library
##       so we'll search for it before calling AC_CHECK_FUNCS.
AC_SEARCH_LIBS([clock_gettime], [rt posix4])
AC_CHECK_FUNCS([alarm asprintf clock_gettime fcntl flock fork])
AC_CHECK_FUNCS([gethostname getrusage gettimeofday])
AC_CHECK_FUNCS([rand_r random])
AC_CHECK_FUNCS([strcasestr strdup symlink])
AC_CHECK_FUNCS([tmpfile vasprintf waitpid])

## ----------------------------------------------------------------------
## Check compiler characteristics
##
AC_MSG_CHECKING([for __attribute__ extension])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],[[int __attribute__((unused)) x]])],
               [AC_DEFINE([HAVE_ATTRIBUTE], [1],
                         [Define if the __attribute__(()) extension is present])
                 AC_MSG_RESULT([yes])],
               [AC_MSG_RESULT([no])])

## ----------------------------------------------------------------------
## Remove old ways of determining debug/production build.
## These were used in 1.8.x and earlier. We should probably keep these checks
## around to help people migrate to 1.10.x and newer versions.
##
AC_ARG_ENABLE([debug],
              [AS_HELP_STRING([--enable-debug], [OPTION CHANGE: use --enable-build-mode=debug])],
              [AC_MSG_ERROR([--enable-debug is no longer supported, use --enable-build-mode=debug instead.])])

AC_ARG_ENABLE([production],
              [AS_HELP_STRING([--enable-production], [OPTION CHANGE: use --enable-build-mode=production])],
              [AC_MSG_ERROR([--enable-production is no longer supported, use --enable-build-mode=production instead.])])


## ----------------------------------------------------------------------
## Check if the compiler should include build diagnostics
##
AC_MSG_CHECKING([enable build diagnostics])
AC_ARG_ENABLE([diags],
              [AS_HELP_STRING([--enable-diags=(yes|no|<custom>)],
                              [Allow default enhanced diagnostics to the build.
                               This is independent of the build mode and optimization
                               level.
                               [default=no]
                               ])],
              [DIAGS=$enableval])

## Set default
if test "X-$DIAGS" = X- ; then
  DIAGS=no
fi

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([DIAGS])

case "X-$DIAGS" in
  X-yes)
    H5_CFLAGS="$H5_CFLAGS $DIAGS_CFLAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $DIAGS_CXXFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $DIAGS_FCFLAGS"
    AC_MSG_RESULT([yes])
    ;;
  X-no)
    H5_CFLAGS="$H5_CFLAGS $NO_DIAGS_CFLAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $NO_DIAGS_CXXFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $NO_DIAGS_FCFLAGS"
    AC_MSG_RESULT([no])
    ;;
  *)
    H5_CFLAGS="$H5_CFLAGS $DIAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $DIAGS"
    H5_FCFLAGS="$H5_FCFLAGS $DIAGS"
    DIAGS="custom ($DIAGS)"
    AC_MSG_RESULT([$DIAGS])
    ;;
esac


## ----------------------------------------------------------------------
## Check if the compiler should include symbols
##
AC_MSG_CHECKING([enable debugging symbols])
AC_ARG_ENABLE([symbols],
              [AS_HELP_STRING([--enable-symbols=(yes|no|<custom>)],
                              [Add debug symbols to the library (e.g.: build with -g).
                               This is independent of the build mode and optimization
                               level. The custom string allows special settings like
                               -ggdb, etc. to be used.
                               [default=yes if debug build, otherwise no]
                               ])],
              [SYMBOLS=$enableval])

## Set default
if test "X-$SYMBOLS" = X- ; then
  if test "X-$BUILD_MODE" = "X-debug" ; then
    SYMBOLS=yes
  else
    SYMBOLS=no
  fi
fi

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([SYMBOLS])

case "X-$SYMBOLS" in
  X-yes)
    H5_CFLAGS="$H5_CFLAGS $SYMBOLS_CFLAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $SYMBOLS_CXXFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $SYMBOLS_FCFLAGS"
    AC_MSG_RESULT([yes])
    ;;
  X-no)
    H5_CFLAGS="$H5_CFLAGS $NO_SYMBOLS_CFLAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $NO_SYMBOLS_CXXFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $NO_SYMBOLS_FCFLAGS"
    AC_MSG_RESULT([no])
    ;;
  *)
    H5_CFLAGS="$H5_CFLAGS $SYMBOLS"
    H5_CXXFLAGS="$H5_CXXFLAGS $SYMBOLS"
    H5_FCFLAGS="$H5_FCFLAGS $SYMBOLS"
    SYMBOLS="custom ($SYMBOLS)"
    AC_MSG_RESULT([$SYMBOLS])
    ;;
esac

## ----------------------------------------------------------------------
## Check if the assert macro should be enabled
##
AC_MSG_CHECKING([enable asserts])
AC_ARG_ENABLE([asserts],
              [AS_HELP_STRING([--enable-asserts],
                              [Determines whether NDEBUG is defined or not, which
                               controls assertions.
                               This is independent of the build mode and presence
                               of debugging symbols.
                               [default=yes if debug build, otherwise no]
                               ])],
              [ASSERTS=$enableval])

## Set default
if test "X-$ASSERTS" = X- ; then
  if test "X-$BUILD_MODE" = "X-debug" ; then
    ASSERTS=yes
  else
    ASSERTS=no
  fi
fi

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([ASSERTS])

case "X-$ASSERTS" in
  X-yes)
    H5_CPPFLAGS="$H5_CPPFLAGS -UNDEBUG"
    AC_MSG_RESULT([yes])
    ;;
  X-no)
    H5_CPPFLAGS="$H5_CPPFLAGS -DNDEBUG"
    AC_MSG_RESULT([no])
    ;;
  *)
    AC_MSG_ERROR([Unrecognized value: $ASSERTS])
    ;;
esac

## Incorporate the potentially warning-to-error promoting flags after
## feature tests.  Some of the tests (e.g., `off_t`) generate compilation
## errors with the flags we chose for the HDF5 library and tools.
##
H5_CFLAGS="$H5_CFLAGS $H5_ECFLAGS"
H5_CXXFLAGS="$H5_CXXFLAGS $H5_ECXXFLAGS"

## ----------------------------------------------------------------------
## Check if developer warnings should be turned on
## These are warnings that provide suggestions like gcc's -Wsuggest-attribute.
## They do not indicate code problems.
##
## Note that developers don't need to build with these regularly. They
## are just handy to check once in a while (before releases, etc.).
##
AC_MSG_CHECKING([enable developer warnings])
AC_ARG_ENABLE([developer-warnings],
              [AS_HELP_STRING([--enable-developer-warnings],
                              [Determines whether developer warnings will be
                               emitted. These are usually performance suggestions
                               (e.g. -Wsuggest-attribute) and do not flag poor code
                               quality.
                               [default=no]
                               ])],
              [DEV_WARNINGS=$enableval])

## Set default
if test "X-$DEV_WARNINGS" = X- ; then
  DEV_WARNINGS=no
fi

case "X-$DEV_WARNINGS" in
  X-yes)
    H5_CFLAGS="$H5_CFLAGS $DEVELOPER_WARNING_CFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $DEVELOPER_WARNING_FCFLAGS"
    AC_MSG_RESULT([yes])
    ;;
  X-no)
    H5_CFLAGS="$H5_CFLAGS $NO_DEVELOPER_WARNING_CFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $NO_DEVELOPER_WARNING_FCFLAGS"
    AC_MSG_RESULT([no])
    ;;
  *)
    AC_MSG_ERROR([Unrecognized value: $DEV_WARNINGS])
    ;;
esac

## ----------------------------------------------------------------------
## Check if they would like suppessed compiler diagnostics displayed
## (i.e. not suppressed)
##
## NOTE: Compiler diagnostics (i.e. warnings) are suppressed for some
##	"noisy" warnings that are harmless (in the opinion of the primary
##	HDF5 development team), but this option is provided to allow
##	developers to see those warnings.
##
AC_MSG_CHECKING([whether showing all compiler warnings is enabled])
AC_ARG_ENABLE([show-all-warnings],
              [AS_HELP_STRING([--enable-show-all-warnings],
                              [Enable showing all compiler warnings (for developer debugging).
                               [default=no]
                              ])],
              [SHOW_ALL_WARNINGS=$enableval])

## Set the default level.
if test "X-$SHOW_ALL_WARNINGS" = X- ; then
  SHOW_ALL_WARNINGS=no
fi

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([SHOW_ALL_WARNINGS])

case "X-$SHOW_ALL_WARNINGS" in
  X-yes)
      AC_MSG_RESULT([yes])
      AC_DEFINE([SHOW_ALL_WARNINGS], [1], [Define if showing all warnings is desired (i.e. not suppressed internally with H5_DIAG_OFF)])
    ;;
  X-no)
      AC_MSG_RESULT([no])
    ;;
  *)
      AC_MSG_ERROR([Unrecognized value: $SHOW_ALL_WARNINGS])
    ;;
esac

## ----------------------------------------------------------------------
## Check if the compiler should use profiling flags/settings
##
AC_MSG_CHECKING([profiling])
AC_ARG_ENABLE([profiling],
              [AS_HELP_STRING([--enable-profiling=(yes|no|<custom>)],
                              [Enable profiling flags (e.g.: -pg).
                               This can be set independently from the build mode.
                               The custom setting can be used to pass alternative
                               profiling flags (e.g.: -P for using Prof with gcc).
                               [default=no]
                               ])],
              [PROFILING=$enableval])

## Default is no profiling
if test "X-$PROFILING" = X- ; then
    PROFILING=no
fi

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([PROFILING])

case "X-$PROFILING" in
  X-yes)
    H5_CFLAGS="$H5_CFLAGS $PROFILE_CFLAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $PROFILE_CXXFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $PROFILE_FCFLAGS"
    AC_MSG_RESULT([yes])
    ;;
  X-no)
    AC_MSG_RESULT([no])
    ;;
  *)
    H5_CFLAGS="$H5_CFLAGS $PROFILING"
    H5_CXXFLAGS="$H5_CXXFLAGS $PROFILING"
    H5_FCFLAGS="$H5_FCFLAGS $PROFILING"
    PROFILING="custom ($PROFILING)"
    AC_MSG_RESULT([$PROFILING])
    ;;
esac

## ----------------------------------------------------------------------
## Check if the compiler should use a particular optimization setting
##
AC_MSG_CHECKING([optimization level])
AC_ARG_ENABLE([optimization],
              [AS_HELP_STRING([--enable-optimization=(high|debug|none|<custom>)],
                              [Enable optimization flags/settings (e.g.: -O3).
                               This can be set independently from the build mode.
                               Optimizations for a given compiler can be specified
                               at several levels: High, with aggressive optimizations
                               turned on; debug, with optimizations that are
                               unlikely to interfere with debugging or profiling;
                               and none, with no optimizations at all.
                               See the compiler-specific config/*-flags file for more
                               details.
                               Alternatively, optimization options can
                               be specified directly by specifying them as a
                               string value. These custom optimization flags will
                               completely replace all other optimization flags.
                               [default depends on build mode: debug=debug,
                                production=high, clean=none]
                               ])],
              [OPTIMIZATION=$enableval])

## Set the default optimization level. This depends on the compiler mode.
if test "X-$OPTIMIZATION" = X- ; then
  case "X-$BUILD_MODE" in
  X-debug)
    OPTIMIZATION=debug
    ;;
  X-production)
    OPTIMIZATION=high
    ;;
  X-clean)
    OPTIMIZATION=none
    ;;
  esac
fi

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([OPTIMIZATION])

case "X-$OPTIMIZATION" in
  X-high)
    H5_CFLAGS="$H5_CFLAGS $HIGH_OPT_CFLAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $HIGH_OPT_CXXFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $HIGH_OPT_FCFLAGS"
    AC_MSG_RESULT([high])
    ;;
  X-debug)
    H5_CFLAGS="$H5_CFLAGS $DEBUG_OPT_CFLAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $DEBUG_OPT_CXXFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $DEBUG_OPT_FCFLAGS"
    AC_MSG_RESULT([debug])
    ;;
  X-none)
    H5_CFLAGS="$H5_CFLAGS $NO_OPT_CFLAGS"
    H5_CXXFLAGS="$H5_CXXFLAGS $NO_OPT_CXXFLAGS"
    H5_FCFLAGS="$H5_FCFLAGS $NO_OPT_FCFLAGS"
    AC_MSG_RESULT([none])
    ;;
  *)
    H5_CFLAGS="$H5_CFLAGS $OPTIMIZATION"
    H5_CXXFLAGS="$H5_CXXFLAGS $OPTIMIZATION"
    H5_FCFLAGS="$H5_FCFLAGS $OPTIMIZATION"
    OPTIMIZATION="custom ($OPTIMIZATION)"
    AC_MSG_RESULT([$OPTIMIZATION])
    ;;
esac

## ----------------------------------------------------------------------
## Check if file locking should be used
##
AC_MSG_CHECKING([enable file locking])
AC_ARG_ENABLE([file-locking],
              [AS_HELP_STRING([--enable-file-locking=(yes|no|best-effort)],
                              [Sets the default for whether or not to use file
                               locking when opening files. Can be overridden
                               with the HDF5_USE_FILE_LOCKING environment variable
                               and the H5Pset_file_locking() API call.
                               best-effort attempts to use file locking but does
                               not fail when file locks have been disabled on
                               the file system (useful with Lustre).
                               [default=best-effort]
                               ])],
              [DESIRED_FILE_LOCKING=$enableval])

## Set defaults
if test "X-$DESIRED_FILE_LOCKING" = X- ; then
  DESIRED_FILE_LOCKING=best-effort
fi

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([DESIRED_FILE_LOCKING])
AC_SUBST([USE_FILE_LOCKING])
AC_SUBST([IGNORE_DISABLED_FILE_LOCKS])

case "X-$DESIRED_FILE_LOCKING" in
  X-best-effort)
      AC_MSG_RESULT([best-effort])
      AC_DEFINE([USE_FILE_LOCKING], [1],
                [Define if the library will use file locking])
      AC_DEFINE([IGNORE_DISABLED_FILE_LOCKS], [1],
                [Define if the library will ignore file locks when disabled])
    ;;
  X-yes)
      AC_MSG_RESULT([yes])
      AC_DEFINE([USE_FILE_LOCKING], [1],
                [Define if the library will use file locking])
    ;;
  X-no)
      AC_MSG_RESULT([no])
    ;;
  *)
      AC_MSG_ERROR([Unrecognized value: $USE_FILE_LOCKING])
    ;;
esac


## ----------------------------------------------------------------------
## Enable/disable internal package-level debugging output
##
AC_MSG_CHECKING([for internal debug output])
AC_ARG_ENABLE([internal-debug],
              [AS_HELP_STRING([--enable-internal-debug=(yes|all|no|none|<pkg list>)],
                              [Enable extra debugging output on HDF5 library
                               errors. One may also specify a comma-separated
                               list of package names without the leading H5.
                               This is independent of the build mode
                               and is mainly of interest to HDF Group developers.
                               Yes/all and no/none are synonymous.
                               [default=all if debug build, otherwise none]
                               ])],
              [INTERNAL_DEBUG_OUTPUT=$enableval])

## Set default
if test "X-$INTERNAL_DEBUG_OUTPUT" = X- ; then
  if test "X-$BUILD_MODE" = "X-debug" ; then
    INTERNAL_DEBUG_OUTPUT=all
  else
    INTERNAL_DEBUG_OUTPUT=none
  fi
fi

AC_SUBST([INTERNAL_DEBUG_OUTPUT])

## These are all the packages that use H5*_DEBUG.
## There is no harm in specifying a package not in this list;
## you'll just get an unused H5<pkg>_DEBUG symbol.
##
## Some packages that define debug checks or output are
## too specialized or have huge performance hits. These
## are not listed in the "all" packages list.
##
## all_packages="AC,B2,CX,D,F,FA,FL,FS,MM,O,T,Z"
all_packages="AC,B2,CX,D,F,MM,O,T,Z"

case "X-$INTERNAL_DEBUG_OUTPUT" in
  X-yes|X-all)
    INTERNAL_DEBUG_OUTPUT=$all_packages
    DEBUG_PKG_LIST=$all_packages
    ;;
  X-no|X-none)
    INTERNAL_DEBUG_OUTPUT=none
    DEBUG_PKG_LIST=
    ;;
  *)
    DEBUG_PKG_LIST=$INTERNAL_DEBUG_OUTPUT
    ;;
esac
AC_MSG_RESULT([$INTERNAL_DEBUG_OUTPUT])

## Define H5*_DEBUG symbols that control package output
## NOTE: No sanity checking done here!
if test -n "$DEBUG_PKG_LIST"; then
  for pkg in `echo $DEBUG_PKG_LIST | ${TR} ${as_cr_letters}"," ${as_cr_LETTERS}" "`; do
    H5_CPPFLAGS="$H5_CPPFLAGS -DH5${pkg}_DEBUG"
  done
fi

## ----------------------------------------------------------------------
## Check if they would like the function stack support compiled in
##
AC_MSG_CHECKING([whether function stack tracking is enabled])
AC_ARG_ENABLE([codestack],
              [AS_HELP_STRING([--enable-codestack],
                              [Enable the function stack tracing (for developer debugging).
                               [default=no]
                              ])],
              [CODESTACK=$enableval])

## Set the default level.
if test "X-$CODESTACK" = X- ; then
  CODESTACK=no
fi

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([CODESTACK])

case "X-$CODESTACK" in
  X-yes)
      AC_MSG_RESULT([yes])
      AC_DEFINE([HAVE_CODESTACK], [1],
                [Define if the function stack tracing code is to be compiled in])
    ;;
  X-no)
      AC_MSG_RESULT([no])
    ;;
  *)
      AC_MSG_ERROR([Unrecognized value: $CODESTACK])
    ;;
esac

## ----------------------------------------------------------------------
## Enable tracing of the API
##
AC_MSG_CHECKING([for API tracing]);
AC_ARG_ENABLE([trace],
              [AS_HELP_STRING([--enable-trace],
                              [Enable HDF5 API tracing capability.
                               [default=yes if debug build, otherwise no]
                               ])],
              [TRACE_API=$enableval])

## Set the default level.
if test "X-$TRACE_API" = X- ; then
  if test "X-$BUILD_MODE" = "X-debug" ; then
    TRACE_API=yes
  else
    TRACE_API=no
  fi
fi

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([TRACE_API])

case "X-$TRACE_API" in
  X-yes)
    AC_MSG_RESULT([yes])
    H5_CPPFLAGS="$H5_CPPFLAGS -DH5_DEBUG_API"
    ;;
  X-no)
    AC_MSG_RESULT([no])
    H5_CPPFLAGS="$H5_CPPFLAGS -UH5_DEBUG_API"
    ;;
  *)
    AC_MSG_ERROR([Unrecognized value: $TRACE_API])
    ;;
esac

## ----------------------------------------------------------------------
## Check if they would like to use a memory checking tool (like valgrind's
##     'memcheck' tool, or Rational Purify, etc) and the library should be
##     more scrupulous with it's memory operations.  Enabling this also
##     disables the library's free space manager code.
##
AC_MSG_CHECKING([whether a memory checking tool will be used])
AC_ARG_ENABLE([using-memchecker],
              [AS_HELP_STRING([--enable-using-memchecker],
                              [Enable this option if a memory allocation and/or
                              bounds checking tool will be used on the HDF5
                              library.  Enabling this causes the library to be
                              more picky about its memory operations and also
                              disables the library's free space manager code.
                              [default=no]
                              ])],
              [USINGMEMCHECKER=$enableval])

## Allow this variable to be substituted in
## other files (src/libhdf5.settings.in, etc.)
AC_SUBST([USINGMEMCHECKER])

## Set the default level.
if test "X-$USINGMEMCHECKER" = X- ; then
  USINGMEMCHECKER=no
fi

case "X-$USINGMEMCHECKER" in
  X-yes)
      AC_DEFINE([USING_MEMCHECKER], [1],
                [Define if a memory checking tool will be used on the library,
                to cause library to be very picky about memory operations and
                also disable the internal free list manager code.])
      AC_MSG_RESULT([yes])
    ;;
  X-no)
      AC_MSG_RESULT([no])
    ;;
  *)
      AC_MSG_ERROR([Unrecognized value: $USINGMEMCHECKER])
    ;;
esac

## Checkpoint the cache
AC_CACHE_SAVE

## What header files and libraries do we have to look for for parallel
## support?  For the most part, search paths are already specified with
## CPPFLAGS and LDFLAGS or are known to the compiler.
##
AC_ARG_ENABLE([parallel],
              [AS_HELP_STRING([--enable-parallel],
                              [Search for MPI-IO and MPI support files])])

## The --enable-parallel flag is not compatible with --enable-cxx.
## If the user tried to specify both flags, throw an error, unless
## they also provided the --enable-unsupported flag.
if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
  if test "X${HDF_CXX}" = "Xyes" -a "X${enable_parallel}" = "Xyes"; then
    AC_MSG_ERROR([--enable-cxx and --enable-parallel flags are incompatible. Use --enable-unsupported to override this error.])
  fi
fi

## The --enable-parallel flag is not compatible with --enable-java.
## If the user tried to specify both flags, throw an error, unless
## they also provided the --enable-unsupported flag.
if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
  if test "X${HDF_JAVA}" = "Xyes" -a "X${enable_parallel}" = "Xyes"; then
    AC_MSG_ERROR([--enable-java and --enable-parallel flags are incompatible. Use --enable-unsupported to override this error.])
  fi
fi

# Requires MPI standard 3.0 and greater
if test "X${enable_parallel}" = "Xyes"; then
  AC_MSG_CHECKING([whether MPI meets the minimum 3.0 standard])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <mpi.h>
       #if MPI_VERSION < 3
       #error, found MPI_VERSION < 3
       #endif]])],
       [AC_MSG_RESULT([yes])],
       [AC_MSG_RESULT([no])
       AC_MSG_ERROR([HDF5 requires MPI standard 3.0 or greater])]
  )
fi

AC_MSG_CHECKING([for parallel support files])
case "X-$enable_parallel" in
  X-|X-no|X-none)
    ## We are not compiling for parallel.
    AC_MSG_RESULT([skipped])
    ;;

  X-yes)
    ## We want to compile a parallel library with a compiler that
    ## may already know how to link with MPI and MPI-IO.
    AC_MSG_RESULT([provided by compiler])
    PARALLEL=yes

    ## Try link a simple MPI program.
    AC_MSG_CHECKING([whether a simple MPI-IO C program can be linked])
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <mpi.h>]],
                   [[ MPI_Init(0, (void *)0);
            MPI_File_open(0, (void *)0, 0, 0, (void *)0);]])],
        [AC_MSG_RESULT([yes])],
            [AC_MSG_RESULT([no])
            AC_MSG_ERROR([unable to link a simple MPI-IO C program])])

    if test "X$HDF_FORTRAN" = "Xyes"; then
      PAC_PROG_FC_MPI_CHECK
    fi

    ## Set RUNPARALLEL to mpiexec if not set yet.
    if test "X$PARALLEL" = "Xyes" -a -z "$RUNPARALLEL"; then
      RUNPARALLEL="mpiexec -n \$\${NPROCS:=6}"
    fi
    ;;

  *)
    AC_MSG_RESULT([error])
    AC_MSG_ERROR([\'$enable_parallel\' is not a valid parallel search type])
    ;;
esac

## ----------------------------------------------------------------------
## Print some other parallel information and do some sanity checks.
## Needs to be done outside of the PARALLEL block since the serial
## build also needs to have values defined.
##
AC_SUBST([ADD_PARALLEL_FILES]) ADD_PARALLEL_FILES="no"
AC_SUBST([INSTRUMENT_LIBRARY]) INSTRUMENT_LIBRARY=no
AC_SUBST([PARALLEL_FILTERED_WRITES])
AC_SUBST([LARGE_PARALLEL_IO])

if test -n "$PARALLEL"; then
  if test "X$HDF5_TESTS" = "Xyes"; then
    ## The 'testpar' directory should participate in the build
    TESTPARALLEL=testpar
  fi

  ## We are building a parallel library
  AC_DEFINE([HAVE_PARALLEL], [1], [Define if we have parallel support])

  ## Display what we found about running programs
  AC_MSG_CHECKING([prefix for running on one processor])
  AC_MSG_RESULT([$RUNSERIAL])
  AC_MSG_CHECKING([prefix for running in parallel])
  AC_MSG_RESULT([$RUNPARALLEL])

  ## There *must* be some way to run in parallel even if it's just the
  ## word `none'.
  if test -z "$RUNPARALLEL"; then
    AC_MSG_ERROR([no way to run a parallel program])
  fi

  ## If RUNSERIAL or RUNPARALLEL is the word `none' then replace it with
  ## the empty string. This means that no launch commands were requested,
  ## so we will not use any launch commands.
  if test "X$RUNSERIAL" = "Xnone"; then
    RUNSERIAL=""
  fi
  if test "X$RUNPARALLEL" = "Xnone"; then
    RUNPARALLEL=""
  fi

  if test "X$HDF_FORTRAN" = "Xyes"; then
    ADD_PARALLEL_FILES="yes"
    AC_MSG_CHECKING([for MPI_Comm_c2f and MPI_Comm_f2c functions])

    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
    #include <mpi.h>
    ]],
      [[MPI_Comm c_comm; MPI_Comm_c2f(c_comm)]])],
      [AC_DEFINE([HAVE_MPI_MULTI_LANG_Comm], [1],
                 [Define if MPI_Comm_c2f and MPI_Comm_f2c exist])
                 AC_MSG_RESULT([yes])],
                 [AC_MSG_RESULT([no])]
    )

    AC_MSG_CHECKING([for MPI_Info_c2f and MPI_Info_f2c functions])
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <mpi.h>]],
      [[MPI_Info c_info; MPI_Info_c2f(c_info)]])],
      [AC_DEFINE([HAVE_MPI_MULTI_LANG_Info], [1],
                [Define if MPI_Info_c2f and MPI_Info_f2c exist])
                AC_MSG_RESULT([yes])],
                [AC_MSG_RESULT([no])]
    )

    AC_LANG_PUSH([Fortran])
    AC_MSG_CHECKING([for MPI-3 module mpi_f08])
    AC_LINK_IFELSE(
      [AC_LANG_PROGRAM([],
                       [
                        USE mpi_f08
                        IMPLICIT NONE
                        TYPE(MPI_Comm) :: comm
                        TYPE(MPI_INFO) :: info
                       ]
                      )
      ],
      [AC_DEFINE([HAVE_MPI_F08], [1],
                [Define if mpi_f08 module exist])
                AC_MSG_RESULT([yes])],
                [AC_MSG_RESULT([no])]
    )
    AC_LANG_POP(Fortran)
  fi

  ## ----------------------------------------------------------------------
  ## Enable instrumenting of the library's internal operations
  ## in parallel builds.
  ##

  ## Set default
  if test "X-$BUILD_MODE" = "X-debug" ; then
    INSTRUMENT_LIBRARY=yes
  else
    INSTRUMENT_LIBRARY=no
  fi

  AC_MSG_CHECKING([for instrumented library]);
  AC_ARG_ENABLE([instrument],
                [AS_HELP_STRING([--enable-instrument],
                                [Enable library instrumentation of optimization
                                  tracing (only used with parallel builds).
                                  [default=yes if a parallel debug build, otherwise no]
                                ])],
                [INSTRUMENT_LIBRARY=$enableval])

  ## Allow this variable to be substituted in
  ## other files (src/libhdf5.settings.in, etc.)
  AC_SUBST([INSTRUMENT_LIBRARY])

  case "X-$INSTRUMENT_LIBRARY" in
    X-yes)
      AC_DEFINE([HAVE_INSTRUMENTED_LIBRARY], [1],
                [Define if parallel library will contain instrumentation to detect correct optimization operation])
      AC_MSG_RESULT([yes])
      ;;
    X-no)
      AC_MSG_RESULT([no])
      ;;
    *)
      AC_MSG_ERROR([Unrecognized value: $INSTRUMENT_LIBRARY])
      ;;
  esac

  ## ----------------------------------------------------------------------
  ## Check for the MPI functions necessary for the Parallel Compression
  ## feature. If these are not present, issue a warning that Parallel
  ## Compression will be disabled.
  ##
  AC_MSG_CHECKING([for MPI_Ibarrier/MPI_Issend/MPI_Iprobe/MPI_Irecv functions])

  AC_LINK_IFELSE(
      [AC_LANG_PROGRAM(
          [[
              #include <mpi.h>
          ]],
          [[
              int flag;
              MPI_Init(0, (void *) 0);
              MPI_Ibarrier(0, (void *) 0);
              MPI_Issend((void *) 0, 0, 0, 0, 0, 0, (void *) 0);
              MPI_Iprobe(0, 0, 0, &flag, (void *) 0);
              MPI_Irecv((void *) 0, 0, 0, 0, 0, 0, (void *) 0);
          ]]
      )],
      [AC_MSG_RESULT([yes])
       PARALLEL_FILTERED_WRITES=yes
       AC_DEFINE([HAVE_PARALLEL_FILTERED_WRITES], [1], [Define if we have support for writing to filtered datasets in parallel])],
      [AC_MSG_RESULT([no])
       AC_MSG_WARN([A simple MPI program using the MPI_Ibarrier, MPI_Issend, MPI_Iprobe and MPI_Irecv functions could not be compiled and linked.
                    Parallel writes of filtered data will be disabled.])
       PARALLEL_FILTERED_WRITES=no]
  )

  ## ----------------------------------------------------------------------
  ## Check for the MPI-3 functions necessary for the big I/O feature.
  ## If these are not present, issue a warning that the big I/O feature
  ## will be disabled.
  ##
  AC_MSG_CHECKING([for MPI_Get_elements_x and MPI_Type_size_x functions])

  AC_LINK_IFELSE(
      [AC_LANG_PROGRAM(
          [[
              #include <mpi.h>
          ]],
          [[
              MPI_Count count;
              MPI_Init(0, (void *) 0);
              MPI_Get_elements_x(0, 0, &count);
              MPI_Type_size_x(0, &count);
          ]]
      )],
      [AC_MSG_RESULT([yes])
       LARGE_PARALLEL_IO=yes],
      [AC_MSG_RESULT([no])
       AC_MSG_WARN([A simple MPI program using the MPI_Get_elements_x and MPI_Type_size_x functions could not be compiled and linked.
                    Reading/Writing >2GB of data in a single parallel I/O operation will be disabled.])
       LARGE_PARALLEL_IO=no]
  )

fi

## ----------------------------------------------------------------------

## Build parallel tools if parallel tools, parallel, and build tools options
## are all enabled.
##
AC_SUBST([PARALLEL_TOOLS])

## Default is no parallel tools
PARALLEL_TOOLS=no

AC_MSG_CHECKING([parallel tools])
AC_ARG_ENABLE([parallel-tools],
              [AS_HELP_STRING([--enable-parallel-tools],
                              [Enable building parallel tools.
                              [default=no]])],
              [PARALLEL_TOOLS=$enableval])

if test "X${PARALLEL_TOOLS}" = "Xyes"; then
  if test "X${HDF5_TOOLS}" != "Xyes"; then
    AC_MSG_ERROR([--enable-tools is required for --enable-parallel-tools])
  fi
  if test "X${PARALLEL}" != "Xyes"; then
    AC_MSG_ERROR([--enable-parallel is required for --enable-parallel-tools])
  fi
fi

case "X-$PARALLEL_TOOLS" in
  X-|X-no)
    AC_MSG_RESULT([no])
  ;;
  X-yes)
    AC_MSG_RESULT([yes])
  ;;
  *)
  ;;
esac

if test "X${PARALLEL_TOOLS}" = "Xyes"; then
  ## Is the mpiFileUtils library (libmfu) required and available?
  ##
  AC_SUBST([H5DWALK_LDFLAGS])
  AC_SUBST([H5DWALK_LIBS])
  AC_SUBST([H5DWALK_CPPFLAGS])

  H5DWALK_LDFLAGS="${H5DWALK_LDFLAGS}"

  ## Default is not present
  HAVE_LIBMFU=no

  AC_ARG_WITH([libmfu],
              [AS_HELP_STRING([--with-libmfu=DIR],
                              [Use the libmfu library [default=no]])],,
              [withval=no])

  case "X-$withval" in
    X-yes)
      HAVE_LIBMFU="yes"
      AC_CHECK_HEADERS([mfu.h],, [unset HAVE_LIBMFU])
      if test "x$HAVE_LIBMFU" = "xyes"; then
        AC_CHECK_LIB([mfu], [mfu_init], [H5DWALK_LIBS="-lmfu"], [unset HAVE_LIBMFU])
      fi
      if test -z "$HAVE_LIBMFU" -a -n "$HDF5_CONFIG_ABORT"; then
        AC_MSG_ERROR([couldn't find libmfu library])
      fi
      ;;
    X-|X-no|X-none)
      HAVE_LIBMFU="no"
      AC_MSG_CHECKING([for libmfu library])
      AC_MSG_RESULT([suppressed])
      ;;
    *)
      HAVE_LIBMFU="yes"
      case "$withval" in
        *,*)
          libmfu_inc="`echo $withval |cut -f1 -d,`"
          libmfu_lib="`echo $withval |cut -f2 -d, -s`"
          ;;
        *)
          if test -n "$withval"; then
            libmfu_inc="$withval/include"
            libmfu_lib="$withval/lib64"
            libcircle_lib="$withval/lib"
          fi
          ;;
      esac

      saved_CPPFLAGS="$CPPFLAGS"
      saved_AM_CPPFLAGS="$AM_CPPFLAGS"
      saved_LDFLAGS="$LDFLAGS"
      saved_AM_LDFLAGS="$AM_LDFLAGS"

  ## For these checks we need the libmfu locations added to CPPFLAGS,
  ## AM_CPPFLAGS, LDFLAGS, and AM_LDFLAGS.  The third param should set them
  ## back to these saved values.  If the checks pass, then normally these four
  ## flag variables would be updated, but in this case we put the changes in
  ## variables specific to H5DWALK since they aren't used elsewhere.
    if test -n "$libmfu_inc"; then
      CPPFLAGS="$CPPFLAGS -I$libmfu_inc"
      AM_CPPFLAGS="$AM_CPPFLAGS -I$libmfu_inc"
    fi

    if test -n "$libmfu_lib"; then
      LDFLAGS="$LDFLAGS -L$libmfu_lib -L$libcircle_lib"
      AM_LDFLAGS="$AM_LDFLAGS -L$libmfu_lib -L$libcircle_lib"
    fi

    if test "x$HAVE_LIBMFU" = "xyes"; then
      AC_CHECK_LIB([mfu], [mfu_init],[H5DWALK_LIBS="-lmfu"], [CPPFLAGS="$saved_CPPFLAGS"; AM_CPPFLAGS="$saved_AM_CPPFLAGS"; LDFLAGS="$saved_LDFLAGS"; AM_LDFLAGS="$saved_AM_LDFLAGS"; unset HAVE_LIBMFU])
      if test -n "$HAVE_LIBMFU"; then
        AC_CHECK_HEADERS([mfu.h],[H5DWALK_CPPFLAGS="-I$libmfu_inc"],[CPPFLAGS="$saved_CPPFLAGS"; AM_CPPFLAGS="$saved_AM_CPPFLAGS"; LDFLAGS="$saved_LDFLAGS"; AM_LDFLAGS="$saved_AM_LDFLAGS"; unset HAVE_LIBMFU])
      fi
    fi

    if test -z "$HAVE_LIBMFU" -a -n "$HDF5_CONFIG_ABORT"; then
      AC_MSG_ERROR([couldn't find libmfu library])
    else
      H5DWALK_LDFLAGS="-L$libmfu_lib -L$libcircle_lib"
    fi

    if test -z  "$LD_LIBRARY_PATH"; then
      export LD_LIBRARY_PATH="$libmfu_lib:$libcircle_lib"
    else
      export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$libmfu_lib:$libcircle_lib"
    fi

    LL_PATH="$LD_LIBRARY_PATH"
    ;;
  esac
fi

##
AM_CONDITIONAL([PARALLEL_TOOLS_CONDITIONAL], [test "X$HAVE_LIBMFU" = "Xyes"])

## ----------------------------------------------------------------------
## Check if the map API is enabled by --enable-map-api
##
AC_SUBST([MAP_API])

## Default is no map API
MAP_API=no

AC_MSG_CHECKING([if the map API (H5M) is enabled])

AC_ARG_ENABLE([map-api],
              [AS_HELP_STRING([--enable-map-api],
                              [Build the map API (H5M).
                               This is not yet supported in the native file format
                               and requires a VOL connector that supports it.
                               [default=no]])],
              [MAP_API=$enableval], [MAP_API=no])

if test "X$MAP_API" = "Xyes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE([HAVE_MAP_API], [1],
            [Define if the map API (H5M) should be compiled])
else
    AC_MSG_RESULT([no])
fi

## ----------------------------------------------------------------------
## Check if Subfiling I/O driver is enabled by --enable-subfiling-vfd
##
AC_SUBST([SUBFILING_VFD])
AC_SUBST([HAVE_MERCURY])

## Default is no subfiling VFD
SUBFILING_VFD=no
HAVE_MERCURY="no"

## Always include subfiling directory so public header files are available
H5_CPPFLAGS="$H5_CPPFLAGS -I$ac_abs_confdir/src/H5FDsubfiling"

AC_MSG_CHECKING([if the subfiling I/O virtual file driver (VFD) is enabled])

AC_ARG_ENABLE([subfiling-vfd],
              [AS_HELP_STRING([--enable-subfiling-vfd],
                              [Build the subfiling I/O virtual file driver (VFD). Requires --enable-parallel.
                               [default=no]])],
              [SUBFILING_VFD=$enableval], [SUBFILING_VFD=no])

if test "X$SUBFILING_VFD" = "Xyes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE([HAVE_SUBFILING_VFD], [1],
            [Define if the subfiling I/O virtual file driver (VFD) should be compiled])
    AC_DEFINE([HAVE_IOC_VFD], [1],
            [Define if the I/O Concentrator virtual file driver (VFD) should be compiled])

    if test "X${PARALLEL}" != "Xyes"; then
      AC_MSG_ERROR([--enable-parallel is required for --enable-subfiling-vfd])
    fi

    ## ----------------------------------------------------------------------
    ## Check for MPI_Comm_split_type availability
    ##
    AC_MSG_CHECKING([for MPI_Comm_split_type function])

    AC_LINK_IFELSE(
      [AC_LANG_PROGRAM(
          [[
              #include <mpi.h>
          ]],
          [[
              MPI_Comm intra_comm;
              MPI_Init(0, (void *) 0);
              MPI_Comm_split_type(MPI_COMM_WORLD, MPI_COMM_TYPE_SHARED, 0, MPI_INFO_NULL, &intra_comm);
          ]]
      )],
      [AC_MSG_RESULT([yes])],
      [AC_MSG_RESULT([no])
       AC_MSG_ERROR([unable to link MPI program that uses MPI_Comm_split_type])
       ]
    )

    # Set-up mercury
    HAVE_MERCURY="yes"
    mercury_dir="$ac_abs_confdir/src/H5FDsubfiling/mercury"
    mercury_inc="$mercury_dir/src/util"

    H5_CPPFLAGS="$H5_CPPFLAGS -I$mercury_inc"

    HAVE_STDATOMIC_H="yes"
    AC_CHECK_HEADERS([stdatomic.h],,[HAVE_STDATOMIC_H="no"])
    if test "x$HAVE_STDATOMIC_H" = "xno"; then
      AC_MSG_ERROR([Subfiling VFD requires atomic operations support. C11 stdatomic.h NOT available.])
    fi

    # Checks for libraries.
    AC_SEARCH_LIBS([shm_open], [rt])
    AC_CHECK_LIB([pthread], [pthread_self],[], [echo "Error: Required library pthread not found." && exit 1])

    # Perform various checks for Mercury util code
    AC_CHECK_DECL([PTHREAD_MUTEX_ADAPTIVE_NP],
                  [AC_DEFINE([HAVE_PTHREAD_MUTEX_ADAPTIVE_NP], [1],
                      [Define if has PTHREAD_MUTEX_ADAPTIVE_NP])],
                  [],
                  [[#include <pthread.h>]])
    AC_CHECK_DECL([pthread_condattr_setclock],
                  [AC_DEFINE([HAVE_PTHREAD_CONDATTR_SETCLOCK], [1],
                      [Define if has pthread_condattr_setclock()])],
                  [],
                  [[#include <pthread.h>]])
    AC_CHECK_DECL([CLOCK_MONOTONIC_COARSE],
                  [AC_DEFINE([HAVE_CLOCK_MONOTONIC_COARSE], [1],
                      [Define if has CLOCK_MONOTONIC_COARSE])],
                  [],
                  [[#include <time.h>]])

else
    AC_MSG_RESULT([no])
fi

## Subfiling and IOC VFD files are not built if not required.
AM_CONDITIONAL([SUBFILING_VFD_CONDITIONAL], [test "X$SUBFILING_VFD" = "Xyes"])
# IOC VFD is currently only built when subfiling is enabled
AM_CONDITIONAL([IOC_VFD_CONDITIONAL], [test "X$SUBFILING_VFD" = "Xyes"])
# Mercury is currently only needed if  subfiling is enabled
AM_CONDITIONAL([HAVE_MERCURY_CONDITIONAL], [test "X$HAVE_MERCURY" = "Xyes"])


## ----------------------------------------------------------------------
## Check if Direct I/O driver is enabled by --enable-direct-vfd
##
AC_SUBST([DIRECT_VFD])

## Default is no direct VFD
DIRECT_VFD=no

AC_CACHE_VAL([hdf5_cv_direct_io],
    AC_CHECK_DECL([O_DIRECT], [hdf5_cv_direct_io=yes], [hdf5_cv_direct_io=no], [[#include <fcntl.h>]]))
AC_CACHE_VAL([hdf5_cv_posix_memalign],
    AC_CHECK_FUNC([posix_memalign], [hdf5_cv_posix_memalign=yes], [hdf5_cv_posix_memalign=no]))

AC_MSG_CHECKING([if the direct I/O virtual file driver (VFD) is enabled])

AC_ARG_ENABLE([direct-vfd],
              [AS_HELP_STRING([--enable-direct-vfd],
                              [Build the direct I/O virtual file driver (VFD).
                               This is based on the POSIX (sec2) VFD and
                               requires the open() call to take the O_DIRECT
                               flag. [default=no]])],
              [DIRECT_VFD=$enableval], [DIRECT_VFD=no])

if test "X$DIRECT_VFD" = "Xyes"; then
    if test ${hdf5_cv_direct_io} = "yes" && test ${hdf5_cv_posix_memalign} = "yes" ; then
        AC_MSG_RESULT([yes])
        AC_DEFINE([HAVE_DIRECT], [1],
                [Define if the direct I/O virtual file driver (VFD) should be compiled])
    else
        AC_MSG_RESULT([no])
        DIRECT_VFD=no
        AC_MSG_ERROR([The direct VFD was requested but cannot be built. This is either
                     due to O_DIRECT not being found in fcntl.h or a lack of
                     posix_memalign() on your system. Please re-configure without
                     specifying --enable-direct-vfd.])
    fi
else
    AC_MSG_RESULT([no])
fi

## Direct VFD files are not built if not required.
AM_CONDITIONAL([DIRECT_VFD_CONDITIONAL], [test "X$DIRECT_VFD" = "Xyes"])

## ----------------------------------------------------------------------
## Check whether the Mirror VFD can be built.
## Auto-enabled if the required libraries are present.
##
AC_SUBST([MIRROR_VFD])

## Default is no Mirror VFD
MIRROR_VFD=no

AC_ARG_ENABLE([mirror-vfd],
              [AS_HELP_STRING([--enable-mirror-vfd],
                              [Build the socket-based Mirror virtual file driver (VFD).
                               [default=no]])],
              [MIRROR_VFD=$enableval], [MIRROR_VFD=no])

if test "X$MIRROR_VFD" = "Xyes"; then

    AC_CHECK_HEADERS([arpa/inet.h],, [unset MIRROR_VFD])
    AC_CHECK_HEADERS([netinet/in.h],, [unset MIRROR_VFD])
    AC_CHECK_HEADERS([netdb.h],, [unset MIRROR_VFD])
    AC_CHECK_HEADERS([sys/socket.h],, [unset MIRROR_VFD])
    AC_CHECK_FUNC([fork], [], [unset MIRROR_VFD])

    AC_MSG_CHECKING([if the Mirror virtual file driver (VFD) can be built])
    if test "X$MIRROR_VFD" = "Xyes"; then
        AC_DEFINE([HAVE_MIRROR_VFD], [1],
                [Define whether the Mirror virtual file driver (VFD) will be compiled])
        AC_MSG_RESULT([yes])
    else
        AC_MSG_RESULT([no])
        MIRROR_VFD=no
        AC_MSG_ERROR([The Mirror VFD cannot be built.
                      Missing one or more of: arpa/inet.h, netinet/in.h,
                      netdb.h, sys/socket.h, fork().])
    fi
else
    AC_MSG_CHECKING([if the Mirror virtual file driver (VFD) is enabled])
    AC_MSG_RESULT([no])
    MIRROR_VFD=no
fi

## Mirror VFD files built only if able.
AM_CONDITIONAL([MIRROR_VFD_CONDITIONAL], [test "X$MIRROR_VFD" = "Xyes"])

## ----------------------------------------------------------------------
## Check if Read-Only S3 virtual file driver is enabled by --enable-ros3-vfd
##
AC_SUBST([ROS3_VFD])

## Default is no Read-Only S3 VFD
ROS3_VFD=no

AC_ARG_ENABLE([ros3-vfd],
              [AS_HELP_STRING([--enable-ros3-vfd],
                              [Build the Read-Only S3 virtual file driver (VFD).
                               [default=no]])],
              [ROS3_VFD=$enableval], [ROS3_VFD=no])

if test "X$ROS3_VFD" = "Xyes"; then
    AC_CHECK_HEADERS([curl/curl.h],, [unset ROS3_VFD])
    AC_CHECK_HEADERS([openssl/evp.h],, [unset ROS3_VFD])
    AC_CHECK_HEADERS([openssl/hmac.h],, [unset ROS3_VFD])
    AC_CHECK_HEADERS([openssl/sha.h],, [unset ROS3_VFD])
    if test "X$ROS3_VFD" = "Xyes"; then
        AC_CHECK_LIB([curl], [curl_global_init],, [unset ROS3_VFD])
        AC_CHECK_LIB([crypto], [EVP_sha256],, [unset ROS3_VFD])
    fi

    AC_MSG_CHECKING([if the Read-Only S3 virtual file driver (VFD) is enabled])
    if test "X$ROS3_VFD" = "Xyes"; then
        AC_DEFINE([HAVE_ROS3_VFD], [1],
                [Define whether the Read-Only S3 virtual file driver (VFD) should be compiled])
        AC_MSG_RESULT([yes])
    else
        AC_MSG_RESULT([no])
        ROS3_VFD=no
        AC_MSG_ERROR([The Read-Only S3 VFD was requested but cannot be built.
                      Please check that openssl and cURL are available on your
                      system, and/or re-configure without option
                      --enable-ros3-vfd.])
    fi
else
    AC_MSG_CHECKING([if the Read-Only S3 virtual file driver (VFD) is enabled])
    AC_MSG_RESULT([no])
    ROS3_VFD=no

fi

## Read-only S3 files are not built if not required.
AM_CONDITIONAL([ROS3_VFD_CONDITIONAL], [test "X$ROS3_VFD" = "Xyes"])


## ----------------------------------------------------------------------
## Is libhdfs (Hadoop Distributed File System) present?
## It might be specified with the `--with-libhdfs' command-line switch.
## If found, enables the HDFS VFD.
##
AC_SUBST([HAVE_LIBHDFS])
AC_ARG_WITH([libhdfs],
            [AS_HELP_STRING([--with-libhdfs=DIR],
                            [Provide libhdfs library to enable HDFS virtual file driver (VFD) [default=no]])],,
            [withval=no])

case $withval in
  no)
    HAVE_LIBHDFS="no"
    AC_MSG_CHECKING([for libhdfs])
    AC_MSG_RESULT([suppressed])
    ;;
  *)
    HAVE_LIBHDFS="yes"
    case "$withval" in
      *,*)
        libhdfs_inc="`echo $withval |cut -f1 -d,`"
        libhdfs_lib="`echo $withval |cut -f2 -d, -s`"
        ;;
      yes)
        libhdfs_inc="$HADOOP_HOME/include"
        libhdfs_lib="$HADOOP_HOME/lib"
        ;;
      *)
        if test -n "$withval"; then
          libhdfs_inc="$withval/include"
          libhdfs_lib="$withval/lib"
        fi
        ;;
    esac

    if test -n "$libhdfs_inc"; then
      CPPFLAGS="$CPPFLAGS -I$libhdfs_inc"
      AM_CPPFLAGS="$AM_CPPFLAGS -I$libhdfs_inc"
    fi
    AC_CHECK_HEADERS([hdfs.h],,
                     [unset HAVE_LIBHDFS])

    if test "x$HAVE_LIBHDFS" = "xyes"; then
      dnl Check for '-ljvm' needed by libhdfs
      JNI_LDFLAGS=""
      if test $JAVA_HOME != ""
      then
        JNI_LDFLAGS="-L$JAVA_HOME/jre/lib/$OS_ARCH -L$JAVA_HOME/jre/lib/$OS_ARCH/server"
      fi
      ldflags_bak=$LDFLAGS
      LDFLAGS="$LDFLAGS $JNI_LDFLAGS"
      AC_CHECK_LIB([jvm], [JNI_GetCreatedJavaVMs])
      LDFLAGS=$ldflags_bak
      AC_SUBST([JNI_LDFLAGS])
      if test -n "$libhdfs_lib"; then
        ## Hadoop distribution hides libraries down one level in 'lib/native'
        libhdfs_lib="$libhdfs_lib/native"
        LDFLAGS="$LDFLAGS -L$libhdfs_lib $JNI_LDFLAGS"
        AM_LDFLAGS="$AM_LDFLAGS -L$libhdfs_lib $JNI_LDFLAGS"
      fi
      AC_CHECK_LIB([hdfs], [hdfsConnect],,
                   [unset HAVE_LIBHDFS])
    fi

    if test -z "$HAVE_LIBHDFS"; then
      AC_MSG_ERROR([Set to use libhdfs library, but could not find or use
                    libhdfs. Please verify that the path to HADOOP_HOME is
                    valid, and/or reconfigure without --with-libhdfs.])
    fi
    ;;
esac

if test "x$HAVE_LIBHDFS" = "xyes"; then
  AC_DEFINE([HAVE_LIBHDFS], [1],
            [Proceed to build with libhdfs])
fi

## Read-only HDFS files are not built if not required.
AM_CONDITIONAL([HDFS_VFD_CONDITIONAL], [test "X$HAVE_LIBHDFS" = "Xyes"])

## Checkpoint the cache
AC_CACHE_SAVE

## ----------------------------------------------------------------------
## Use custom examples path.
##
AC_MSG_CHECKING([for custom examples path definition])
AC_ARG_WITH([examplesdir],
            [AS_HELP_STRING([--with-examplesdir=location],
                            [Specify path for examples
                            [default="DATAROOTDIR/hdf5_examples"]])],,
            withval="${datarootdir}/hdf5_examples")

if test "X$withval" = "X"; then
    AC_MSG_RESULT([default])
    examplesdir="${datarootdir}/hdf5_examples"
else
    AC_MSG_RESULT([$withval])
    examplesdir=$withval
fi

AC_SUBST([examplesdir])
AC_DEFINE_UNQUOTED([EXAMPLESDIR], ["$examplesdir"],
            [Define the examples directory])

## ----------------------------------------------------------------------
## Enable custom plugin default path for library.  It requires SHARED support.
##
AC_MSG_CHECKING([for custom plugin default path definition])
AC_ARG_WITH([default-plugindir],
            [AS_HELP_STRING([--with-default-plugindir=location],
                            [Specify default location for plugins
                            [default="/usr/local/hdf5/lib/plugin"]])],,
            withval="/usr/local/hdf5/lib/plugin")

if test "X$withval" = "X"; then
    AC_MSG_RESULT([default])
    default_plugindir="/usr/local/hdf5/lib/plugin"
else
    AC_MSG_RESULT([$withval])
    default_plugindir=$withval
fi

AC_DEFINE_UNQUOTED([DEFAULT_PLUGINDIR], ["$default_plugindir"],
            [Define the default plugins path to compile])

## ----------------------------------------------------------------------
## Decide whether the presence of user's exception handling functions is
## checked and data conversion exceptions are returned.  This is mainly
## for the speed optimization of hard conversions.  Soft conversions can
## actually benefit little.
##
AC_MSG_CHECKING([whether exception handling functions is checked during data conversions])
AC_ARG_ENABLE([dconv-exception],
              [AS_HELP_STRING([--enable-dconv-exception],
                              [if exception handling functions is checked during
                              data conversions [default=yes]])],
              [DCONV_EXCEPTION=$enableval], [DCONV_EXCEPTION=yes])

if test "$DCONV_EXCEPTION" = "yes"; then
  AC_MSG_RESULT([yes])
  AC_DEFINE([WANT_DCONV_EXCEPTION], [1],
            [Check exception handling functions during data conversions])
else
  AC_MSG_RESULT([no])
fi

## ----------------------------------------------------------------------
## Decide whether the data accuracy has higher priority during data
## conversions.  If not, some hard conversions will still be preferred even
## though the data may be wrong (for example, some compilers don't
## support denormalized floating values) to maximize speed.
##
AC_MSG_CHECKING([whether data accuracy is guaranteed during data conversions])
AC_ARG_ENABLE([dconv-accuracy],
              [AS_HELP_STRING([--enable-dconv-accuracy],
                              [if data accuracy is guaranteed during
                              data conversions [default=yes]])],
              [DATA_ACCURACY=$enableval], [DATA_ACCURACY=yes])

if test "$DATA_ACCURACY" = "yes"; then
  AC_MSG_RESULT([yes])
  AC_DEFINE([WANT_DATA_ACCURACY], [1],
            [Data accuracy is preferred to speed during data conversions])
else
  AC_MSG_RESULT([no])
fi

## ----------------------------------------------------------------------
## Set the flag to indicate that the machine has window style pathname,
## that is, "drive-letter:\" (e.g. "C:") or "drive-letter:/" (e.g. "C:/").
## (This flag should be _unset_ for all machines, except for Windows, where
## it's set in the custom Windows H5pubconf.h file)
##
AC_MSG_CHECKING([if the machine has window style path name])

case "`uname`" in
  MINGW*)
    AC_DEFINE([HAVE_WINDOW_PATH], [1],
              [Define if your system has window style path name.])
    AC_MSG_RESULT([yes])
    ;;
  *)
    AC_MSG_RESULT([no])
    ;;
esac

## ----------------------------------------------------------------------
## Set the flag to indicate that the machine is using a special algorithm to convert
## 'long double' to '(unsigned) long' values.  (This flag should only be set for
## the IBM Power Linux.  When the bit sequence of long double is
## 0x4351ccf385ebc8a0bfcc2a3c3d855620, the converted value of (unsigned)long
## is 0x004733ce17af227f, not the same as the library's conversion to 0x004733ce17af2282.
## The machine's conversion gets the correct value.  We define the macro and disable
## this kind of test until we figure out what algorithm they use.
##
## CROSS-COMPILING: Assume 'no'
AC_MSG_CHECKING([if using special algorithm to convert long double to (unsigned) long values])

## NOTE: Place all configure test programs into cmake's source file, then use a preprocessor directive
## to select the proper test program. This is done by echoing the #define and cat'ing the cmake
## source file. (HDFFV-9467)

TEST_SRC="`(echo \"#define H5_LDOUBLE_TO_LONG_SPECIAL_TEST 1\"; cat $srcdir/config/cmake/ConversionTests.c)`"

if test ${ac_cv_sizeof_long_double} = 0; then
   hdf5_cv_ldouble_to_long_special=${hdf5_cv_ldouble_to_long_special=no}
else
   AC_CACHE_VAL([hdf5_cv_ldouble_to_long_special],
        [AC_RUN_IFELSE(
            [AC_LANG_SOURCE([$TEST_SRC])]
    , [hdf5_cv_ldouble_to_long_special=yes], [hdf5_cv_ldouble_to_long_special=no], [hdf5_cv_ldouble_to_long_special=no])])
fi

if test ${hdf5_cv_ldouble_to_long_special} = "yes"; then
  AC_DEFINE([LDOUBLE_TO_LONG_SPECIAL], [1],
            [Define if your system converts long double to (unsigned) long values with special algorithm.])
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi

## ----------------------------------------------------------------------
## Set the flag to indicate that the machine is using a special algorithm
## to convert some values of '(unsigned) long' to 'long double' values.
## (This flag should be off for all machines, except for IBM Power Linux,
## when the bit sequences are 003fff..., 007fff..., 00ffff..., 01ffff...,
## ..., 7fffff..., the compiler uses a unknown algorithm.  We define a
## macro and skip the test for now until we know about the algorithm.
##
## CROSS-COMPILING: Assume 'no'
AC_MSG_CHECKING([if using special algorithm to convert (unsigned) long to long double values])

TEST_SRC="`(echo \"#define H5_LONG_TO_LDOUBLE_SPECIAL_TEST 1\"; cat $srcdir/config/cmake/ConversionTests.c)`"

if test ${ac_cv_sizeof_long_double} = 0; then
   hdf5_cv_long_to_ldouble_special=${hdf5_cv_long_to_ldouble_special=no}
else
   AC_CACHE_VAL([hdf5_cv_long_to_ldouble_special],
        [AC_RUN_IFELSE(
            [AC_LANG_SOURCE([$TEST_SRC])]
    , [hdf5_cv_long_to_ldouble_special=yes], [hdf5_cv_long_to_ldouble_special=no], [hdf5_cv_long_to_ldouble_special=no])])
fi

if test ${hdf5_cv_long_to_ldouble_special} = "yes"; then
  AC_DEFINE([LONG_TO_LDOUBLE_SPECIAL], [1],
            [Define if your system can convert (unsigned) long to long double values with special algorithm.])
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi

## ----------------------------------------------------------------------
## Set the flag to indicate that the machine can accurately convert
## 'long double' to '(unsigned) long long' values.  (This flag should
## be set for all machines, except for Mac OS 10.4, SGI IRIX64 6.5 and
## Powerpc Linux using XL compilers.
## When the bit sequence of long double is 0x4351ccf385ebc8a0bfcc2a3c...,
## the values of (unsigned)long long start to go wrong on these
## two machines.  Adjusting it higher to 0x4351ccf385ebc8a0dfcc... or
## 0x4351ccf385ebc8a0ffcc... will make the converted values wildly wrong.
## This test detects this wrong behavior and disable the test.
##
## CROSS-COMPILING: Assume 'yes'
AC_MSG_CHECKING([if correctly converting long double to (unsigned) long long values])

TEST_SRC="`(echo \"#define H5_LDOUBLE_TO_LLONG_ACCURATE_TEST 1\"; cat $srcdir/config/cmake/ConversionTests.c)`"

if test ${ac_cv_sizeof_long_double} = 0; then
   hdf5_cv_ldouble_to_llong_accurate=${hdf5_cv_ldouble_to_llong_accurate=no}
else
   AC_CACHE_VAL([hdf5_cv_ldouble_to_llong_accurate],
        [AC_RUN_IFELSE([AC_LANG_SOURCE([$TEST_SRC])],
        [hdf5_cv_ldouble_to_llong_accurate=yes], [hdf5_cv_ldouble_to_llong_accurate=no], [hdf5_cv_ldouble_to_llong_accurate=yes])])
fi

if test ${hdf5_cv_ldouble_to_llong_accurate} = "yes"; then
  AC_DEFINE([LDOUBLE_TO_LLONG_ACCURATE], [1],
            [Define if your system can convert long double to (unsigned) long long values correctly.])
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi


## ----------------------------------------------------------------------
## Set the flag to indicate that the machine can accurately convert
## '(unsigned) long long' to 'long double' values.  (This flag should be
## set for all machines, except for Mac OS 10.4 and Powerpc Linux using
## XL compilers.
## When the bit sequences are 003fff..., 007fff..., 00ffff..., 01ffff...,
## ..., 7fffff..., the converted values are twice as big as they should be.
##
## CROSS-COMPILING: Assume 'yes'
AC_MSG_CHECKING([if correctly converting (unsigned) long long to long double values])

TEST_SRC="`(echo \"#define H5_LLONG_TO_LDOUBLE_CORRECT_TEST 1\"; cat $srcdir/config/cmake/ConversionTests.c)`"

if test ${ac_cv_sizeof_long_double} = 0; then
   hdf5_cv_llong_to_ldouble_correct=${hdf5_cv_llong_to_ldouble_correct=no}
else
   AC_CACHE_VAL([hdf5_cv_llong_to_ldouble_correct],
        [AC_RUN_IFELSE([AC_LANG_SOURCE([$TEST_SRC])],
        [hdf5_cv_llong_to_ldouble_correct=yes], [hdf5_cv_llong_to_ldouble_correct=no], [hdf5_cv_llong_to_ldouble_correct=yes])])
fi

if test ${hdf5_cv_llong_to_ldouble_correct} = "yes"; then
  AC_DEFINE([LLONG_TO_LDOUBLE_CORRECT], [1],
            [Define if your system can convert (unsigned) long long to long double values correctly.])
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi

## ----------------------------------------------------------------------
## Set the flag to indicate that the machine is IBM ppc64le and cannot
## accurately convert some long double values.
##
## CROSS-COMPILING: Assume 'yes'
AC_MSG_CHECKING([if the system is IBM ppc64le and cannot correctly convert some long double values])

TEST_SRC="`(echo \"#define H5_DISABLE_SOME_LDOUBLE_CONV_TEST 1\"; cat $srcdir/config/cmake/ConversionTests.c)`"

if test ${ac_cv_sizeof_long_double} = 0; then
   hdf5_cv_disable_some_ldouble_conv=${hdf5_cv_disable_some_ldouble_conv=no}
else
   AC_CACHE_VAL([hdf5_cv_disable_some_ldouble_conv],
        [AC_RUN_IFELSE([AC_LANG_SOURCE([$TEST_SRC])],
        [hdf5_cv_disable_some_ldouble_conv=yes], [hdf5_cv_disable_some_ldouble_conv=no], [hdf5_cv_disable_some_ldouble_conv=yes])])
fi

if test ${hdf5_cv_disable_some_ldouble_conv} = "yes"; then
  AC_DEFINE([DISABLE_SOME_LDOUBLE_CONV], [1],
            [Define if your system is IBM ppc64le and cannot convert some long double values correctly.])
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi

## ----------------------------------------------------------------------
## Set some variables for general configuration information to be saved
## and installed with the libraries (used to generate libhdf5.settings).
##

## HDF5 version from the first line of the README.md file.
H5_VERSION="`cut -d' ' -f3 $srcdir/README.md | head -1`"
AC_SUBST([H5_VERSION])

## Configuration date
AC_SUBST([CONFIG_DATE]) CONFIG_DATE="`date`"

## User doing the configuration
AC_SUBST([CONFIG_USER]) CONFIG_USER="`whoami`@`hostname`"
if test -n "$ORGANIZATION"; then
  CONFIG_USER="$CONFIG_USER at $ORGANIZATION"
fi

## Configuration mode (production, debug, etc.) saved above.
AC_SUBST([CONFIG_MODE])

## Byte sex from the AC_C_BIGENDIAN macro.
AC_SUBST([BYTESEX])
if test "X$ac_cv_c_bigendian" = "Xyes"; then
  BYTESEX="big-endian"
else
  BYTESEX="little-endian"
fi


if test "X$ac_cv_c_bigendian" = "Xyes"; then
  WORDS_BIGENDIAN="yes"
else
  WORDS_BIGENDIAN="no"
fi
AC_SUBST([WORDS_BIGENDIAN])

## Parallel support? (set above except empty if none)
PARALLEL=${PARALLEL:-no}

## Parallel writes to filtered datasets support?
PARALLEL_FILTERED_WRITES=${PARALLEL_FILTERED_WRITES:-no}

## >2GB writes in parallel support?
LARGE_PARALLEL_IO=${LARGE_PARALLEL_IO:-no}

## Compiler with version information. This consists of the full path
## name of the compiler and the reported version number.
AC_SUBST([CC_VERSION])
## Strip anything that looks like a flag off of $CC
CC_NOFLAGS=`echo $CC | sed 's/ -.*//'`

if `echo $CC_NOFLAGS | grep ^/ >/dev/null 2>&1`; then
  CC_VERSION="$CC"
else
  CC_VERSION="$CC";
  for x in `echo $PATH | sed -e 's/:/ /g'`; do
    if test -x $x/$CC_NOFLAGS; then
      CC_VERSION="$x/$CC"
      break
    fi
  done
fi
if test -n "$cc_version_info"; then
  CC_VERSION="$CC_VERSION ( $cc_version_info)"
fi

AC_SUBST([FC_VERSION])
## Strip anything that looks like a flag off of $FC
FC_NOFLAGS=`echo $FC | sed 's/ -.*//'`

if `echo $FC_NOFLAGS | grep ^/ >/dev/null 2>&1`; then
  FC_VERSION="$FC"
else
  FC_VERSION="$FC";
  for x in `echo $PATH | sed -e 's/:/ /g'`; do
    if test -x $x/$FC_NOFLAGS; then
      FC_VERSION="$x/$FC"
      break
    fi
  done
fi
if test -n "$fc_version_info"; then
  FC_VERSION="$FC_VERSION ( $fc_version_info)"
fi

AC_SUBST([CXX_VERSION])
## Strip anything that looks like a flag off of $CXX
CXX_NOFLAGS=`echo $CXX | sed 's/ -.*//'`

if `echo $CXX_NOFLAGS | grep ^/ >/dev/null 2>&1`; then
  CXX_VERSION="$CXX"
else
  CXX_VERSION="$CXX";
  for x in `echo $PATH | sed -e 's/:/ /g'`; do
    if test -x $x/$CXX_NOFLAGS; then
      CXX_VERSION="$x/$CXX"
      break
    fi
  done
fi
if test -n "$cxx_version_info"; then
  CXX_VERSION="$CXX_VERSION ( $cxx_version_info)"
fi

AC_SUBST([JAVA_VERSION])
## Strip anything that looks like a flag off of $JAVA
JAVA_NOFLAGS=`echo $JAVA | sed 's/ -.*//'`

if `echo $JAVA_NOFLAGS | grep ^/ >/dev/null 2>&1`; then
  JAVA_VERSION="$JAVA"
else
  JAVA_VERSION="$JAVA";
  for x in `echo $PATH | sed -e 's/:/ /g'`; do
    if test -x $x/$JAVA_NOFLAGS; then
      JAVA_VERSION="$x/$JAVA"
      break
    fi
  done
fi
java_version_info=`$JAVA -version 2>&1 |\
  grep 'version' | sed -e 's/version "//' | sed -e 's/"//'`
if test -n "$java_version_info"; then
  JAVA_VERSION="$JAVA_VERSION ($java_version_info)"
fi

## ----------------------------------------------------------------------
## Where is the root of the source tree. Give an absolute address so
## we can find it no matter which directory of the distribution is our
## current directory. The built-in pwd fails on some systems, but the
## /bin/pwd version works OK.
##
if test -x /bin/pwd; then
  pwd=/bin/pwd
else
  pwd=pwd
fi
AC_SUBST([ROOT]) ROOT="`$pwd`"

## ----------------------------------------------------------------------
## Some programs shouldn't be built by default (e.g., programs to generate
## data files used by tests, some optional tests).
## Check if they want such programs built anyway.
##
AC_MSG_CHECKING([additional programs should be built])
AC_ARG_ENABLE([build-all],
     [AS_HELP_STRING([--enable-build-all],
                     [Build helper programs that only developers should need [default=no]])],
     [BUILD_ALL=$enableval],
     [BUILD_ALL=no])
AC_MSG_RESULT([$BUILD_ALL])
AM_CONDITIONAL([BUILD_ALL_CONDITIONAL], [test "X$BUILD_ALL" = "Xyes"])

## ----------------------------------------------------------------------
## Enable deprecated public API symbols
##

## Enabled unless the build mode is clean.
if test "X-$BUILD_MODE" = "X-clean" ; then
  DEPREC_SYMBOLS=no
else
  DEPREC_SYMBOLS=yes
fi

AC_SUBST([DEPRECATED_SYMBOLS])
AC_MSG_CHECKING([if deprecated public symbols are available]);
AC_ARG_ENABLE([deprecated-symbols],
              [AS_HELP_STRING([--enable-deprecated-symbols],
                     [Enable deprecated public API symbols.
                     [default=yes (unless build mode = clean)]
                     ])],
              [DEPREC_SYMBOLS=$enableval])

case "X-$DEPREC_SYMBOLS" in
  X-yes)
    AC_MSG_RESULT([yes])
    DEPRECATED_SYMBOLS=yes
    ;;
  X-no|*)
    AC_MSG_RESULT([no])
    DEPRECATED_SYMBOLS=no
    AC_DEFINE([NO_DEPRECATED_SYMBOLS], [1],
              [Define if deprecated public API symbols are disabled])
    ;;
esac

## --------------------------------------------------------------------------
## Which version of the public APIs should the 'base' versioned symbols use?
##

AC_SUBST([DEFAULT_API_VERSION])
AC_MSG_CHECKING([which version of public symbols to use by default])
AC_ARG_WITH([default-api-version],
            [AS_HELP_STRING([--with-default-api-version=(default|v16|v18|v110|v112|v114|v116)],
                            [Specify default release version of public symbols
                             [default=v116]])],,
            [withval=v116])

## Allowing "default" allows the GitHub CI to check that we didn't forget
## to change the defaults when creating a new major version
if test "X$withval" = "Xv16"; then
    AC_MSG_RESULT([v16])
    DEFAULT_API_VERSION=v16
    AC_DEFINE([USE_16_API_DEFAULT], [1],
              [Define using v1.6 public API symbols by default])
elif test "X$withval" = "Xv18"; then
    AC_MSG_RESULT([v18])
    DEFAULT_API_VERSION=v18
    AC_DEFINE([USE_18_API_DEFAULT], [1],
              [Define using v1.8 public API symbols by default])
elif test "X$withval" = "Xv110"; then
    AC_MSG_RESULT([v110])
    DEFAULT_API_VERSION=v110
    AC_DEFINE([USE_110_API_DEFAULT], [1],
              [Define using v1.10 public API symbols by default])
elif test "X$withval" = "Xv112"; then
    AC_MSG_RESULT([v112])
    DEFAULT_API_VERSION=v112
    AC_DEFINE([USE_112_API_DEFAULT], [1],
              [Define using v1.12 public API symbols by default])
elif test "X$withval" = "Xv114"; then
    AC_MSG_RESULT([v114])
    DEFAULT_API_VERSION=v114
    AC_DEFINE([USE_114_API_DEFAULT], [1],
              [Define using v1.14 public API symbols by default])
elif test "X$withval" = "Xv116" -o "X$withval" = "Xdefault"; then
    AC_MSG_RESULT([v116])
    DEFAULT_API_VERSION=v116
    AC_DEFINE([USE_116_API_DEFAULT], [1],
              [Define using v1.16 public API symbols by default])
else
    AC_MSG_ERROR([invalid version of public symbols given])
fi

## It's an error to try to disable deprecated public API symbols while
## choosing an older version of the public API as the default. However,
## if the user insists on doing this via the --enable-unsupported configure
## flag, we'll let them.
if test "X${ALLOW_UNSUPPORTED}" != "Xyes"; then
  if test "X${DEFAULT_API_VERSION}" != "Xv116" -a "X${DEPRECATED_SYMBOLS}" = "Xno" ; then
    AC_MSG_ERROR([Removing old public API symbols not allowed when using them as default public API symbols. Use --enable-unsupported to override this error.])
  fi
fi

## ----------------------------------------------------------------------
## Enable strict file format checks
##
AC_SUBST([STRICT_FORMAT_CHECKS])
AC_MSG_CHECKING([whether to perform strict file format checks]);
AC_ARG_ENABLE([strict-format-checks],
              [AS_HELP_STRING([--enable-strict-format-checks],
                     [Enable strict file format checks.
                      [default=yes if debug build, otherwise no]
                     ])],
             [STRICT_FORMAT_CHECKS=$enableval])

## Set the default level. This depends on the compiler mode.
if test "X-$STRICT_FORMAT_CHECKS" = X- ; then
  if test "X-$BUILD_MODE" = "X-debug" ; then
    STRICT_FORMAT_CHECKS=yes
  else
    STRICT_FORMAT_CHECKS=no
  fi
fi

case "X-$STRICT_FORMAT_CHECKS" in
  X-yes)
    AC_MSG_RESULT([yes])
    AC_DEFINE([STRICT_FORMAT_CHECKS], [1],
              [Define if strict file format checks are enabled])
    ;;
  X-no)
    AC_MSG_RESULT([no])
    ;;
  *)
    AC_MSG_ERROR([Unrecognized value: $STRICT_FORMAT_CHECKS])
    ;;
esac


## ----------------------------------------------------------------------
## Enable use of pread/pwrite instead of read/write in certain VFDs.
##
AC_SUBST([PREADWRITE])

## Check these first to avoid interspersed output in the AC_ARG_ENABLE line
## below. (Probably overkill to check for both, but we'll be extra careful)
PREADWRITE_HAVE_BOTH=yes
AC_CHECK_FUNC([pread], [], [PREADWRITE_HAVE_BOTH=no])
AC_CHECK_FUNC([pwrite], [], [PREADWRITE_HAVE_BOTH=no])

AC_MSG_CHECKING([whether to use pread/pwrite instead of read/write in certain VFDs])
AC_ARG_ENABLE([preadwrite],
              [AS_HELP_STRING([--enable-preadwrite],
                              [Enable using pread/pwrite instead of read/write in sec2/log/core VFDs.
                              [default=yes if pread/pwrite are present]])],
              [PREADWRITE=$enableval])

## Set the default level.
if test "X-$PREADWRITE" = X- ; then
  PREADWRITE=yes
fi

case "X-$PREADWRITE" in
  X-yes)
      if test "X-$PREADWRITE_HAVE_BOTH" = "X-yes"; then
        AC_DEFINE([HAVE_PREADWRITE], [1], [Define if both pread and pwrite exist.])
        AC_MSG_RESULT([yes])
      else
        AC_MSG_RESULT([no])
      fi
    ;;
  X-no)
      AC_MSG_RESULT([no])
    ;;
  *)
      AC_MSG_ERROR([Unrecognized value: $PREADWRITE])
    ;;
esac


## ----------------------------------------------------------------------
## Enable embedded library information
##
AC_MSG_CHECKING([whether to have library information embedded in the executables])
AC_ARG_ENABLE([embedded-libinfo],
    [AS_HELP_STRING([--enable-embedded-libinfo],
    [Enable embedded library information [default=yes]])],
    [enable_embedded_libinfo=$enableval],
    [enable_embedded_libinfo=yes])

   if test "${enable_embedded_libinfo}" = "yes"; then
      AC_MSG_RESULT([yes])
      BUILD_SETTINGS_FILE="src/H5build_settings.autotools.c.in"
      AC_DEFINE([HAVE_EMBEDDED_LIBINFO], [1],
                [Define if library information should be embedded in the executables])
   else
      BUILD_SETTINGS_FILE="src/H5build_settings.off.c.in"
      AC_MSG_RESULT([no])
    fi


## ----------------------------------------------------------------------
## Restore user's CFLAGS.
CFLAGS="$saved_user_CFLAGS"
FCFLAGS="$saved_user_FCFLAGS"
CXXFLAGS="$saved_user_CXXFLAGS"
CPPFLAGS="$saved_user_CPPFLAGS"
JAVACFLAGS="$saved_user_JAVACFLAGS"
JAVAFLAGS="$saved_user_JAVAFLAGS"
LDFLAGS="$saved_user_LDFLAGS"


## ----------------------------------------------------------------------
## Create automake conditionals to tell automake makefiles which directories
## need to be compiled

AM_CONDITIONAL([BUILD_CXX_CONDITIONAL], [test "X$HDF_CXX" = "Xyes"])
AM_CONDITIONAL([BUILD_PARALLEL_CONDITIONAL], [test "X$PARALLEL" = "Xyes"])
AM_CONDITIONAL([BUILD_FORTRAN_CONDITIONAL], [test "X$HDF_FORTRAN" = "Xyes"])
AM_CONDITIONAL([BUILD_JAVA_CONDITIONAL], [test "X$HDF_JAVA" = "Xyes"])
AM_CONDITIONAL([BUILD_HDF5_HL_CONDITIONAL], [test "X$HDF5_HL" = "Xyes"])
AM_CONDITIONAL([BUILD_TESTS_CONDITIONAL], [test "X$HDF5_TESTS" = "Xyes"])
AM_CONDITIONAL([BUILD_TESTS_PARALLEL_CONDITIONAL], [test -n "$TESTPARALLEL"])
AM_CONDITIONAL([BUILD_TOOLS_CONDITIONAL], [test "X$HDF5_TOOLS" = "Xyes"])
AM_CONDITIONAL([BUILD_TOOLS_HL_GIF_CONDITIONAL], [test "X$HDF5_HL_GIF_TOOLS" = "Xyes"])
AM_CONDITIONAL([BUILD_DOXYGEN_CONDITIONAL], [test "X$HDF5_DOXYGEN" = "Xyes"])

## ----------------------------------------------------------------------
## Build the Makefiles.
##

## The directory search list
AC_SUBST([SEARCH]) SEARCH='$(srcdir) $(top_builddir)/src $(top_srcdir)/src'
export SEARCH

## Some cleanup stuff
rm -f conftest conftest.o conftest.c dummy.o *.mod

## Build config.status, touch the stamp files, and build all the Makefiles.
## The order is such that the first `make' does not need to update any
## configuration information. See config/commence.in for the order in which
## things need to be done.

## First the stamp1 file for H5config.h.in
mkdir ./config >/dev/null 2>&1
touch ./config/stamp1

## Then the config.status file (but not makefiles)
saved_no_create=$no_create
no_create=yes

PARALLEL_MAKE=""
FORTRAN_PARALLEL_MAKE=""

if test -n "$TESTPARALLEL"; then
  PARALLEL_MAKE="$TESTPARALLEL/Makefile"

  if test "X$HDF_FORTRAN" = "Xyes"; then
    FORTRAN_PARALLEL_MAKE=fortran/$TESTPARALLEL/Makefile
  fi
fi
LT_OUTPUT
no_create=$saved_no_create

## Then the stamp2 file for H5config.h
touch ./config/stamp2

## Finally the makefiles
test "$no_create" = yes || ${CONFIG_SHELL-/bin/sh} $CONFIG_STATUS || exit 1

## Are we compiling static libraries, shared libraries, or both?  This
## is only used for the libhdf5.settings file. We can't just look at
## $enable_static and $enable_shared because if they're yes the ltconfig
## might have decided that one or the other is simply not possible.
## Therefore we have to ask the generated `libtool' shell script
## which 'features' it has enabled.
if (./libtool --features | grep '^enable shared libraries' > /dev/null); then
  enable_shared=yes
else
  enable_shared=no
fi

if (./libtool --features | grep '^enable static libraries' > /dev/null); then
  enable_static=yes
else
  enable_static=no
fi

## Expose things for *.in markup
AC_SUBST([STATIC_SHARED])
AC_SUBST([enable_shared])
AC_SUBST([enable_static])

if test "X$enable_static" = "Xyes" && test "X$enable_shared" = "Xyes"; then
  STATIC_SHARED="static, shared"
elif test "X$enable_static" = "Xyes"; then
  STATIC_SHARED="static"
elif test "X$enable_shared" = "Xyes"; then
  STATIC_SHARED="shared"
else
  STATIC_SHARED="none"
fi

if test "X$HDF_FORTRAN" = "Xyes"; then

  ### libtool does not pass the correct argument linking (-Wl,-Wl,,) for the NAG Fortran compiler
  ### on Linux (other OSs have not been tested).
  ### Therefore, detect if we are using the NAG Fortran compiler, and replace the wl="-Wl," for Fortran to
  ### wl="-Wl,-Wl,," in the libtool file. (HDFFV-10037)
  case "`uname`" in
    Linux*)

    fortran_linux_linker_option="-Wl,"
    if test "X$FC_BASENAME" = "Xnagfor"; then
       fortran_linux_linker_option="-Wl,-Wl,,"
    fi

    ## Set the correct linker option for use in h5fc.in markup
    AC_SUBST([fortran_linux_linker_option])
    ;;
  esac

fi

## ----------------------------------------------------------------------
## Set a macro if shared library is enabled.
##
AM_CONDITIONAL([HAVE_SHARED_CONDITIONAL], [test "X$enable_shared" = "Xyes"])

AC_CONFIG_FILES([Makefile
                 doxygen/Doxyfile
                 src/Makefile
                 src/libhdf5.settings
                 src/H5build_settings.c:${BUILD_SETTINGS_FILE}
                 test/Makefile
                 test/H5srcdir_str.h
                 test/test_abort_fail.sh
                 test/test_check_version.sh
                 test/test_error.sh
                 test/test_external_env.sh
                 test/test_flush_refresh.sh
                 test/test_libinfo.sh
                 test/test_links_env.sh
                 test/test_mirror.sh
                 test/test_plugin.sh
                 test/test_swmr.sh
                 test/test_use_cases.sh
                 test/test_vds_env.sh
                 test/test_vds_swmr.sh
                 testpar/Makefile
                 testpar/testpflush.sh
                 utils/Makefile
                 utils/mirror_vfd/Makefile
                 utils/test/Makefile
                 utils/tools/Makefile
                 utils/tools/h5dwalk/Makefile
                 utils/tools/test/Makefile
                 utils/tools/test/h5dwalk/Makefile
                 utils/tools/test/h5dwalk/copy_demo_files.sh
                 utils/tools/test/h5dwalk/testh5dwalk.sh
                 tools/Makefile
                 tools/lib/Makefile
                 tools/libtest/Makefile
                 tools/src/Makefile
                 tools/src/h5dump/Makefile
                 tools/src/h5import/Makefile
                 tools/src/h5diff/Makefile
                 tools/src/h5jam/Makefile
                 tools/src/h5repack/Makefile
                 tools/src/h5ls/Makefile
                 tools/src/h5copy/Makefile
                 tools/src/misc/Makefile
                 tools/src/h5stat/Makefile
                 tools/test/Makefile
                 tools/test/h5dump/Makefile
                 tools/test/h5dump/h5dump_plugin.sh
                 tools/test/h5dump/testh5dump.sh
                 tools/test/h5dump/testh5dumppbits.sh
                 tools/test/h5dump/testh5dumpvds.sh
                 tools/test/h5dump/testh5dumpxml.sh
                 tools/test/h5ls/Makefile
                 tools/test/h5ls/h5ls_plugin.sh
                 tools/test/h5ls/testh5ls.sh
                 tools/test/h5ls/testh5lsvds.sh
                 tools/test/h5import/Makefile
                 tools/test/h5import/h5importtestutil.sh
                 tools/test/h5diff/Makefile
                 tools/test/h5diff/h5diff_plugin.sh
                 tools/test/h5diff/testh5diff.sh
                 tools/test/h5diff/testph5diff.sh
                 tools/src/h5format_convert/Makefile
                 tools/test/h5format_convert/Makefile
                 tools/test/h5format_convert/testh5fc.sh
                 tools/test/h5jam/Makefile
                 tools/test/h5jam/testh5jam.sh
                 tools/test/h5repack/Makefile
                 tools/test/h5repack/h5repack.sh
                 tools/test/h5repack/h5repack_plugin.sh
                 tools/test/h5copy/Makefile
                 tools/test/h5copy/testh5copy.sh
                 tools/test/misc/Makefile
                 tools/test/misc/testh5clear.sh
                 tools/test/misc/testh5mkgrp.sh
                 tools/test/misc/testh5repart.sh
                 tools/test/misc/vds/Makefile
                 tools/test/h5stat/Makefile
                 tools/test/h5stat/testh5stat.sh
                 tools/src/h5perf/Makefile
                 tools/test/perform/Makefile
                 examples/Makefile
                 examples/run-c-ex.sh
                 examples/testh5cc.sh
                 bin/h5cc
                 bin/Makefile
                 c++/Makefile
                 c++/src/Makefile
                 c++/src/h5c++
                 c++/test/Makefile
                 c++/test/H5srcdir_str.h
                 c++/examples/Makefile
                 c++/examples/run-c++-ex.sh
                 c++/examples/testh5c++.sh
                 fortran/Makefile
                 fortran/src/h5fc
                 fortran/src/Makefile
                 fortran/src/H5fort_type_defines.h
                 fortran/test/Makefile
                 fortran/testpar/Makefile
                 fortran/examples/Makefile
                 fortran/examples/run-fortran-ex.sh
                 fortran/examples/testh5fc.sh
                 java/Makefile
                 java/src/Makefile
                 java/src/jni/Makefile
                 java/test/Makefile
                 java/test/junit.sh
                 hl/Makefile
                 hl/src/Makefile
                 hl/test/Makefile
                 hl/test/H5srcdir_str.h
                 hl/tools/Makefile
                 hl/tools/gif2h5/Makefile
                 hl/tools/gif2h5/h52giftest.sh
                 hl/tools/h5watch/Makefile
                 hl/tools/h5watch/testh5watch.sh
                 hl/examples/Makefile
                 hl/examples/run-hlc-ex.sh
                 hl/c++/Makefile
                 hl/c++/src/Makefile
                 hl/c++/test/Makefile
                 hl/c++/examples/Makefile
                 hl/c++/examples/run-hlc++-ex.sh
                 hl/fortran/Makefile
                 hl/fortran/src/Makefile
                 hl/fortran/test/Makefile
                 hl/fortran/examples/Makefile
                 hl/fortran/examples/run-hlfortran-ex.sh])

AC_CONFIG_FILES([utils/subfiling_vfd/h5fuse], [chmod +x utils/subfiling_vfd/h5fuse])
if test -n "$TESTPARALLEL"; then
  if test "X$SUBFILING_VFD" = "Xyes"; then
    AC_CONFIG_LINKS([testpar/h5fuse:utils/subfiling_vfd/h5fuse])
  fi
fi

AC_OUTPUT

chmod 755 bin/h5cc
if test "X$HDF_CXX" = "Xyes"; then
  chmod 755 c++/src/h5c++
fi


if test "X$HDF_FORTRAN" = "Xyes"; then
  chmod 755 fortran/src/h5fc
  ## libtool does not pass the correct argument linker (wl=) for the Intel Fortran compiler
  ## on OS X, which is needed when building shared libraries on OS X.  This script
  ## replaces the 3rd occurrence, which is for Fortran, of wl="" with wl="-Wl," (HDFFV-2772)
  case "`uname`" in
    Darwin*)
      cat libtool | awk '/wl=\"/{c++;if(c==3){sub("wl=\"\"","wl=\"-Wl,\"");c=0}}1' > libtool.tmp && mv -f libtool.tmp libtool && chmod 755 libtool
      ;;
  esac

  ### libtool does not pass the correct linker options for some Fortran compilers
  ### on Linux (other OSs have not been tested).
  case "`uname`" in
    Linux*)
      ### NAG Fortran needs to replace "-Wl," with "-Wl,-Wl,," (HDFFV-10037)
      if test "X$FC_BASENAME" = "Xnagfor"; then
         cat libtool | awk '/BEGIN LIBTOOL TAG CONFIG: FC/{flag=1}flag&&/wl=/{$NF="wl=\"-Wl,-Wl,,\"";flag=0}1' > libtool.tmp && mv -f libtool.tmp libtool && chmod 755 libtool
      fi
      ### Flang needs to replace "", with "-Wl," (avoids unknown option: -soname issues)
      if test "X$FC_BASENAME" = "Xflang"; then
         cat libtool | awk '/BEGIN LIBTOOL TAG CONFIG: FC/{flag=1}flag&&/wl=/{$NF="wl=\"-Wl,\"";flag=0}1' > libtool.tmp && mv -f libtool.tmp libtool && chmod 755 libtool
      fi
      ;;
  esac
fi

## show the configure settings
cat src/libhdf5.settings