summaryrefslogtreecommitdiffstats
path: root/Modules/FindBoost.cmake
blob: 4cc32be28bff29719f858aaf961a02170bd4a70b (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
# - Find Boost include dirs and libraries
# Use this module by invoking find_package with the form:
#  find_package(Boost
#    [version] [EXACT]      # Minimum or EXACT version e.g. 1.36.0
#    [REQUIRED]             # Fail with error if Boost is not found
#    [COMPONENTS <libs>...] # Boost libraries by their canonical name
#    )                      # e.g. "date_time" for "libboost_date_time"
# This module finds headers and requested component libraries OR a CMake
# package configuration file provided by a "Boost CMake" build.  For the
# latter case skip to the "Boost CMake" section below.  For the former
# case results are reported in variables:
#  Boost_FOUND            - True if headers and requested libraries were found
#  Boost_INCLUDE_DIRS     - Boost include directories
#  Boost_LIBRARY_DIRS     - Link directories for Boost libraries
#  Boost_LIBRARIES        - Boost component libraries to be linked
#  Boost_<C>_FOUND        - True if component <C> was found (<C> is upper-case)
#  Boost_<C>_LIBRARY      - Libraries to link for component <C> (may include
#                           target_link_libraries debug/optimized keywords)
#  Boost_VERSION          - BOOST_VERSION value from boost/version.hpp
#  Boost_LIB_VERSION      - Version string appended to library filenames
#  Boost_MAJOR_VERSION    - Boost major version number (X in X.y.z)
#  Boost_MINOR_VERSION    - Boost minor version number (Y in x.Y.z)
#  Boost_SUBMINOR_VERSION - Boost subminor version number (Z in x.y.Z)
#  Boost_LIB_DIAGNOSTIC_DEFINITIONS (Windows)
#                         - Pass to add_definitions() to have diagnostic
#                           information about Boost's automatic linking
#                           displayed during compilation
#
# This module reads hints about search locations from variables:
#  BOOST_ROOT             - Preferred installation prefix
#   (or BOOSTROOT)
#  BOOST_INCLUDEDIR       - Preferred include directory e.g. <prefix>/include
#  BOOST_LIBRARYDIR       - Preferred library directory e.g. <prefix>/lib
#  Boost_NO_SYSTEM_PATHS  - Set to ON to disable searching in locations not
#                           specified by these hint variables. Default is OFF.
#  Boost_ADDITIONAL_VERSIONS
#                         - List of Boost versions not known to this module
#                           (Boost install locations may contain the version)
# and saves search results persistently in CMake cache entries:
#  Boost_INCLUDE_DIR         - Directory containing Boost headers
#  Boost_LIBRARY_DIR         - Directory containing Boost libraries
#  Boost_<C>_LIBRARY_DEBUG   - Component <C> library debug variant
#  Boost_<C>_LIBRARY_RELEASE - Component <C> library release variant
# Users may set these hints or results as cache entries.  Projects should
# not read these entries directly but instead use the above result variables.
# Note that some hint names start in upper-case "BOOST".  One may specify
# these as environment variables if they are not specified as CMake variables
# or cache entries.
#
# This module first searches for the Boost header files using the above hint
# variables (excluding BOOST_LIBRARYDIR) and saves the result in
# Boost_INCLUDE_DIR.  Then it searches for requested component libraries using
# the above hints (excluding BOOST_INCLUDEDIR and Boost_ADDITIONAL_VERSIONS),
# "lib" directories near Boost_INCLUDE_DIR, and the library name configuration
# settings below.  It saves the library directory in Boost_LIBRARY_DIR and
# individual library locations in Boost_<C>_LIBRARY_DEBUG and
# Boost_<C>_LIBRARY_RELEASE.  When one changes settings used by previous
# searches in the same build tree (excluding environment variables) this
# module discards previous search results affected by the changes and searches
# again.
#
# Boost libraries come in many variants encoded in their file name.  Users or
# projects may tell this module which variant to find by setting variables:
#  Boost_USE_MULTITHREADED  - Set to OFF to use the non-multithreaded
#                             libraries ('mt' tag).  Default is ON.
#  Boost_USE_STATIC_LIBS    - Set to ON to force the use of the static
#                             libraries.  Default is OFF.
#  Boost_USE_STATIC_RUNTIME - Set to ON or OFF to specify whether to use
#                             libraries linked statically to the C++ runtime
#                             ('s' tag).  Default is platform dependent.
#  Boost_USE_DEBUG_PYTHON   - Set to ON to use libraries compiled with a
#                             debug Python build ('y' tag). Default is OFF.
#  Boost_USE_STLPORT        - Set to ON to use libraries compiled with
#                             STLPort ('p' tag).  Default is OFF.
#  Boost_USE_STLPORT_DEPRECATED_NATIVE_IOSTREAMS
#                           - Set to ON to use libraries compiled with
#                             STLPort deprecated "native iostreams"
#                             ('n' tag).  Default is OFF.
#  Boost_COMPILER           - Set to the compiler-specific library suffix
#                             (e.g. "-gcc43").  Default is auto-computed
#                             for the C++ compiler in use.
#  Boost_THREADAPI          - Suffix for "thread" component library name,
#                             such as "pthread" or "win32".  Names with
#                             and without this suffix will both be tried.
# Other variables one may set to control this module are:
#  Boost_DEBUG              - Set to ON to enable debug output from FindBoost.
#                             Please enable this before filing any bug report.
#  Boost_DETAILED_FAILURE_MSG
#                           - Set to ON to add detailed information to the
#                             failure message even when the REQUIRED option
#                             is not given to the find_package call.
#  Boost_REALPATH           - Set to ON to resolve symlinks for discovered
#                             libraries to assist with packaging.  For example,
#                             the "system" component library may be resolved to
#                             "/usr/lib/libboost_system.so.1.42.0" instead of
#                             "/usr/lib/libboost_system.so".  This does not
#                             affect linking and should not be enabled unless
#                             the user needs this information.
# On Visual Studio and Borland compilers Boost headers request automatic
# linking to corresponding libraries.  This requires matching libraries to be
# linked explicitly or available in the link library search path.  In this
# case setting Boost_USE_STATIC_LIBS to OFF may not achieve dynamic linking.
# Boost automatic linking typically requests static libraries with a few
# exceptions (such as Boost.Python).  Use
#  add_definitions(${Boost_LIB_DIAGNOSTIC_DEFINITIONS})
# to ask Boost to report information about automatic linking requests.
#
# Example to find Boost headers only:
#  find_package(Boost 1.36.0)
#  if(Boost_FOUND)
#    include_directories(${Boost_INCLUDE_DIRS})
#    add_executable(foo foo.cc)
#  endif()
# Example to find Boost headers and some libraries:
#  set(Boost_USE_STATIC_LIBS        ON)
#  set(Boost_USE_MULTITHREADED      ON)
#  set(Boost_USE_STATIC_RUNTIME    OFF)
#  find_package(Boost 1.36.0 COMPONENTS date_time filesystem system ...)
#  if(Boost_FOUND)
#    include_directories(${Boost_INCLUDE_DIRS})
#    add_executable(foo foo.cc)
#    target_link_libraries(foo ${Boost_LIBRARIES})
#  endif()
#
# Boost CMake ----------------------------------------------------------
#
# If Boost was built using the boost-cmake project it provides a package
# configuration file for use with find_package's Config mode.  This module
# looks for the package configuration file called BoostConfig.cmake or
# boost-config.cmake and stores the result in cache entry "Boost_DIR".  If
# found, the package configuration file is loaded and this module returns with
# no further action.  See documentation of the Boost CMake package
# configuration for details on what it provides.
#
# Set Boost_NO_BOOST_CMAKE to ON to disable the search for boost-cmake.

#=============================================================================
# Copyright 2006-2012 Kitware, Inc.
# Copyright 2006-2008 Andreas Schneider <mail@cynapses.org>
# Copyright 2007      Wengo
# Copyright 2007      Mike Jackson
# Copyright 2008      Andreas Pakulat <apaku@gmx.de>
# Copyright 2008-2012 Philip Lowman <philip@yhbt.com>
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
#  License text for the above reference.)


#-------------------------------------------------------------------------------
# Before we go searching, check whether boost-cmake is available, unless the
# user specifically asked NOT to search for boost-cmake.
#
# If Boost_DIR is set, this behaves as any find_package call would. If not,
# it looks at BOOST_ROOT and BOOSTROOT to find Boost.
#
if (NOT Boost_NO_BOOST_CMAKE)
  # If Boost_DIR is not set, look for BOOSTROOT and BOOST_ROOT as alternatives,
  # since these are more conventional for Boost.
  if ("$ENV{Boost_DIR}" STREQUAL "")
    if (NOT "$ENV{BOOST_ROOT}" STREQUAL "")
      set(ENV{Boost_DIR} $ENV{BOOST_ROOT})
    elseif (NOT "$ENV{BOOSTROOT}" STREQUAL "")
      set(ENV{Boost_DIR} $ENV{BOOSTROOT})
    endif()
  endif()

  # Do the same find_package call but look specifically for the CMake version.
  # Note that args are passed in the Boost_FIND_xxxxx variables, so there is no
  # need to delegate them to this find_package call.
  find_package(Boost QUIET NO_MODULE)
  mark_as_advanced(Boost_DIR)

  # If we found boost-cmake, then we're done.  Print out what we found.
  # Otherwise let the rest of the module try to find it.
  if (Boost_FOUND)
    message("Boost ${Boost_FIND_VERSION} found.")
    if (Boost_FIND_COMPONENTS)
      message("Found Boost components:")
      message("   ${Boost_FIND_COMPONENTS}")
    endif()
    return()
  endif()
endif()


#-------------------------------------------------------------------------------
#  FindBoost functions & macros
#

############################################
#
# Check the existence of the libraries.
#
############################################
# This macro was taken directly from the FindQt4.cmake file that is included
# with the CMake distribution. This is NOT my work. All work was done by the
# original authors of the FindQt4.cmake file. Only minor modifications were
# made to remove references to Qt and make this file more generally applicable
# And ELSE/ENDIF pairs were removed for readability.
#########################################################################

macro(_Boost_ADJUST_LIB_VARS basename)
  if(Boost_INCLUDE_DIR )
    if(Boost_${basename}_LIBRARY_DEBUG AND Boost_${basename}_LIBRARY_RELEASE)
      # if the generator supports configuration types then set
      # optimized and debug libraries, or if the CMAKE_BUILD_TYPE has a value
      if(CMAKE_CONFIGURATION_TYPES OR CMAKE_BUILD_TYPE)
        set(Boost_${basename}_LIBRARY optimized ${Boost_${basename}_LIBRARY_RELEASE} debug ${Boost_${basename}_LIBRARY_DEBUG})
      else()
        # if there are no configuration types and CMAKE_BUILD_TYPE has no value
        # then just use the release libraries
        set(Boost_${basename}_LIBRARY ${Boost_${basename}_LIBRARY_RELEASE} )
      endif()
      # FIXME: This probably should be set for both cases
      set(Boost_${basename}_LIBRARIES optimized ${Boost_${basename}_LIBRARY_RELEASE} debug ${Boost_${basename}_LIBRARY_DEBUG})
    endif()

    # if only the release version was found, set the debug variable also to the release version
    if(Boost_${basename}_LIBRARY_RELEASE AND NOT Boost_${basename}_LIBRARY_DEBUG)
      set(Boost_${basename}_LIBRARY_DEBUG ${Boost_${basename}_LIBRARY_RELEASE})
      set(Boost_${basename}_LIBRARY       ${Boost_${basename}_LIBRARY_RELEASE})
      set(Boost_${basename}_LIBRARIES     ${Boost_${basename}_LIBRARY_RELEASE})
    endif()

    # if only the debug version was found, set the release variable also to the debug version
    if(Boost_${basename}_LIBRARY_DEBUG AND NOT Boost_${basename}_LIBRARY_RELEASE)
      set(Boost_${basename}_LIBRARY_RELEASE ${Boost_${basename}_LIBRARY_DEBUG})
      set(Boost_${basename}_LIBRARY         ${Boost_${basename}_LIBRARY_DEBUG})
      set(Boost_${basename}_LIBRARIES       ${Boost_${basename}_LIBRARY_DEBUG})
    endif()

    # If the debug & release library ends up being the same, omit the keywords
    if(${Boost_${basename}_LIBRARY_RELEASE} STREQUAL ${Boost_${basename}_LIBRARY_DEBUG})
      set(Boost_${basename}_LIBRARY   ${Boost_${basename}_LIBRARY_RELEASE} )
      set(Boost_${basename}_LIBRARIES ${Boost_${basename}_LIBRARY_RELEASE} )
    endif()

    if(Boost_${basename}_LIBRARY)
      set(Boost_${basename}_FOUND ON)
    endif()

  endif()
  # Make variables changeable to the advanced user
  mark_as_advanced(
      Boost_${basename}_LIBRARY_RELEASE
      Boost_${basename}_LIBRARY_DEBUG
  )
endmacro()

macro(_Boost_CHANGE_DETECT changed_var)
  set(${changed_var} 0)
  foreach(v ${ARGN})
    if(DEFINED _Boost_COMPONENTS_SEARCHED)
      if(${v})
        if(_${v}_LAST)
          string(COMPARE NOTEQUAL "${${v}}" "${_${v}_LAST}" _${v}_CHANGED)
        else()
          set(_${v}_CHANGED 1)
        endif()
      elseif(_${v}_LAST)
        set(_${v}_CHANGED 1)
      endif()
      if(_${v}_CHANGED)
        set(${changed_var} 1)
      endif()
    else()
      set(_${v}_CHANGED 0)
    endif()
  endforeach()
endmacro()

macro(_Boost_FIND_LIBRARY var)
  find_library(${var} ${ARGN})

  # If we found the first library save Boost_LIBRARY_DIR.
  if(${var} AND NOT Boost_LIBRARY_DIR)
    get_filename_component(_dir "${${var}}" PATH)
    set(Boost_LIBRARY_DIR "${_dir}" CACHE PATH "Boost library directory" FORCE)
  endif()

  # If Boost_LIBRARY_DIR is known then search only there.
  if(Boost_LIBRARY_DIR)
    set(_boost_LIBRARY_SEARCH_DIRS ${Boost_LIBRARY_DIR} NO_DEFAULT_PATH)
  endif()
endmacro()

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

#
# Runs compiler with "-dumpversion" and parses major/minor
# version with a regex.
#
function(_Boost_COMPILER_DUMPVERSION _OUTPUT_VERSION)

  exec_program(${CMAKE_CXX_COMPILER}
    ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
    OUTPUT_VARIABLE _boost_COMPILER_VERSION
  )
  string(REGEX REPLACE "([0-9])\\.([0-9])(\\.[0-9])?" "\\1\\2"
    _boost_COMPILER_VERSION ${_boost_COMPILER_VERSION})

  set(${_OUTPUT_VERSION} ${_boost_COMPILER_VERSION} PARENT_SCOPE)
endfunction()

#
# Take a list of libraries with "thread" in it
# and prepend duplicates with "thread_${Boost_THREADAPI}"
# at the front of the list
#
function(_Boost_PREPEND_LIST_WITH_THREADAPI _output)
  set(_orig_libnames ${ARGN})
  string(REPLACE "thread" "thread_${Boost_THREADAPI}" _threadapi_libnames "${_orig_libnames}")
  set(${_output} ${_threadapi_libnames} ${_orig_libnames} PARENT_SCOPE)
endfunction()

#
# If a library is found, replace its cache entry with its REALPATH
#
function(_Boost_SWAP_WITH_REALPATH _library _docstring)
  if(${_library})
    get_filename_component(_boost_filepathreal ${${_library}} REALPATH)
    unset(${_library} CACHE)
    set(${_library} ${_boost_filepathreal} CACHE FILEPATH "${_docstring}")
  endif()
endfunction()

function(_Boost_CHECK_SPELLING _var)
  if(${_var})
    string(TOUPPER ${_var} _var_UC)
    message(FATAL_ERROR "ERROR: ${_var} is not the correct spelling.  The proper spelling is ${_var_UC}.")
  endif()
endfunction()

# Guesses Boost's compiler prefix used in built library names
# Returns the guess by setting the variable pointed to by _ret
function(_Boost_GUESS_COMPILER_PREFIX _ret)
  if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel"
      OR "${CMAKE_CXX_COMPILER}" MATCHES "icl"
      OR "${CMAKE_CXX_COMPILER}" MATCHES "icpc")
    if(WIN32)
      set (_boost_COMPILER "-iw")
    else()
      set (_boost_COMPILER "-il")
    endif()
  elseif (MSVC11)
    set(_boost_COMPILER "-vc110")
  elseif (MSVC10)
    set(_boost_COMPILER "-vc100")
  elseif (MSVC90)
    set(_boost_COMPILER "-vc90")
  elseif (MSVC80)
    set(_boost_COMPILER "-vc80")
  elseif (MSVC71)
    set(_boost_COMPILER "-vc71")
  elseif (MSVC70) # Good luck!
    set(_boost_COMPILER "-vc7") # yes, this is correct
  elseif (MSVC60) # Good luck!
    set(_boost_COMPILER "-vc6") # yes, this is correct
  elseif (BORLAND)
    set(_boost_COMPILER "-bcb")
  elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "SunPro")
    set(_boost_COMPILER "-sw")
  elseif (MINGW)
    if(${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION} VERSION_LESS 1.34)
        set(_boost_COMPILER "-mgw") # no GCC version encoding prior to 1.34
    else()
      _Boost_COMPILER_DUMPVERSION(_boost_COMPILER_VERSION)
      set(_boost_COMPILER "-mgw${_boost_COMPILER_VERSION}")
    endif()
  elseif (UNIX)
    if (CMAKE_COMPILER_IS_GNUCXX)
      if(${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION} VERSION_LESS 1.34)
        set(_boost_COMPILER "-gcc") # no GCC version encoding prior to 1.34
      else()
        _Boost_COMPILER_DUMPVERSION(_boost_COMPILER_VERSION)
        # Determine which version of GCC we have.
        if(APPLE)
          if(Boost_MINOR_VERSION)
            if(${Boost_MINOR_VERSION} GREATER 35)
              # In Boost 1.36.0 and newer, the mangled compiler name used
              # on Mac OS X/Darwin is "xgcc".
              set(_boost_COMPILER "-xgcc${_boost_COMPILER_VERSION}")
            else()
              # In Boost <= 1.35.0, there is no mangled compiler name for
              # the Mac OS X/Darwin version of GCC.
              set(_boost_COMPILER "")
            endif()
          else()
            # We don't know the Boost version, so assume it's
            # pre-1.36.0.
            set(_boost_COMPILER "")
          endif()
        else()
          set(_boost_COMPILER "-gcc${_boost_COMPILER_VERSION}")
        endif()
      endif()
    endif ()
  else()
    # TODO at least Boost_DEBUG here?
    set(_boost_COMPILER "")
  endif()
  set(${_ret} ${_boost_COMPILER} PARENT_SCOPE)
endfunction()

#
# End functions/macros
#
#-------------------------------------------------------------------------------

#-------------------------------------------------------------------------------
# main.
#-------------------------------------------------------------------------------

if(NOT DEFINED Boost_USE_MULTITHREADED)
    set(Boost_USE_MULTITHREADED TRUE)
endif()

# Check the version of Boost against the requested version.
if(Boost_FIND_VERSION AND NOT Boost_FIND_VERSION_MINOR)
  message(SEND_ERROR "When requesting a specific version of Boost, you must provide at least the major and minor version numbers, e.g., 1.34")
endif()

if(Boost_FIND_VERSION_EXACT)
  # The version may appear in a directory with or without the patch
  # level, even when the patch level is non-zero.
  set(_boost_TEST_VERSIONS
    "${Boost_FIND_VERSION_MAJOR}.${Boost_FIND_VERSION_MINOR}.${Boost_FIND_VERSION_PATCH}"
    "${Boost_FIND_VERSION_MAJOR}.${Boost_FIND_VERSION_MINOR}")
else()
  # The user has not requested an exact version.  Among known
  # versions, find those that are acceptable to the user request.
  set(_Boost_KNOWN_VERSIONS ${Boost_ADDITIONAL_VERSIONS}
    "1.56.0" "1.56" "1.55.0" "1.55" "1.54.0" "1.54"
    "1.53.0" "1.53" "1.52.0" "1.52" "1.51.0" "1.51"
    "1.50.0" "1.50" "1.49.0" "1.49" "1.48.0" "1.48" "1.47.0" "1.47" "1.46.1"
    "1.46.0" "1.46" "1.45.0" "1.45" "1.44.0" "1.44" "1.43.0" "1.43" "1.42.0" "1.42"
    "1.41.0" "1.41" "1.40.0" "1.40" "1.39.0" "1.39" "1.38.0" "1.38" "1.37.0" "1.37"
    "1.36.1" "1.36.0" "1.36" "1.35.1" "1.35.0" "1.35" "1.34.1" "1.34.0"
    "1.34" "1.33.1" "1.33.0" "1.33")
  set(_boost_TEST_VERSIONS)
  if(Boost_FIND_VERSION)
    set(_Boost_FIND_VERSION_SHORT "${Boost_FIND_VERSION_MAJOR}.${Boost_FIND_VERSION_MINOR}")
    # Select acceptable versions.
    foreach(version ${_Boost_KNOWN_VERSIONS})
      if(NOT "${version}" VERSION_LESS "${Boost_FIND_VERSION}")
        # This version is high enough.
        list(APPEND _boost_TEST_VERSIONS "${version}")
      elseif("${version}.99" VERSION_EQUAL "${_Boost_FIND_VERSION_SHORT}.99")
        # This version is a short-form for the requested version with
        # the patch level dropped.
        list(APPEND _boost_TEST_VERSIONS "${version}")
      endif()
    endforeach()
  else()
    # Any version is acceptable.
    set(_boost_TEST_VERSIONS "${_Boost_KNOWN_VERSIONS}")
  endif()
endif()

# The reason that we failed to find Boost. This will be set to a
# user-friendly message when we fail to find some necessary piece of
# Boost.
set(Boost_ERROR_REASON)

if(Boost_DEBUG)
  # Output some of their choices
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "_boost_TEST_VERSIONS = ${_boost_TEST_VERSIONS}")
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "Boost_USE_MULTITHREADED = ${Boost_USE_MULTITHREADED}")
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "Boost_USE_STATIC_LIBS = ${Boost_USE_STATIC_LIBS}")
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "Boost_USE_STATIC_RUNTIME = ${Boost_USE_STATIC_RUNTIME}")
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "Boost_ADDITIONAL_VERSIONS = ${Boost_ADDITIONAL_VERSIONS}")
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "Boost_NO_SYSTEM_PATHS = ${Boost_NO_SYSTEM_PATHS}")
endif()

if(WIN32)
  # In windows, automatic linking is performed, so you do not have
  # to specify the libraries.  If you are linking to a dynamic
  # runtime, then you can choose to link to either a static or a
  # dynamic Boost library, the default is to do a static link.  You
  # can alter this for a specific library "whatever" by defining
  # BOOST_WHATEVER_DYN_LINK to force Boost library "whatever" to be
  # linked dynamically.  Alternatively you can force all Boost
  # libraries to dynamic link by defining BOOST_ALL_DYN_LINK.

  # This feature can be disabled for Boost library "whatever" by
  # defining BOOST_WHATEVER_NO_LIB, or for all of Boost by defining
  # BOOST_ALL_NO_LIB.

  # If you want to observe which libraries are being linked against
  # then defining BOOST_LIB_DIAGNOSTIC will cause the auto-linking
  # code to emit a #pragma message each time a library is selected
  # for linking.
  set(Boost_LIB_DIAGNOSTIC_DEFINITIONS "-DBOOST_LIB_DIAGNOSTIC")
endif()

_Boost_CHECK_SPELLING(Boost_ROOT)
_Boost_CHECK_SPELLING(Boost_LIBRARYDIR)
_Boost_CHECK_SPELLING(Boost_INCLUDEDIR)

# Collect environment variable inputs as hints.  Do not consider changes.
foreach(v BOOSTROOT BOOST_ROOT BOOST_INCLUDEDIR BOOST_LIBRARYDIR)
  set(_env $ENV{${v}})
  if(_env)
    file(TO_CMAKE_PATH "${_env}" _ENV_${v})
  else()
    set(_ENV_${v} "")
  endif()
endforeach()
if(NOT _ENV_BOOST_ROOT AND _ENV_BOOSTROOT)
  set(_ENV_BOOST_ROOT "${_ENV_BOOSTROOT}")
endif()

# Collect inputs and cached results.  Detect changes since the last run.
if(NOT BOOST_ROOT AND BOOSTROOT)
  set(BOOST_ROOT "${BOOSTROOT}")
endif()
set(_Boost_VARS_DIR
  BOOST_ROOT
  Boost_NO_SYSTEM_PATHS
  )

if(Boost_DEBUG)
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "Declared as CMake or Environmental Variables:")
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "  BOOST_ROOT = ${BOOST_ROOT}")
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "  BOOST_INCLUDEDIR = ${BOOST_INCLUDEDIR}")
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "  BOOST_LIBRARYDIR = ${BOOST_LIBRARYDIR}")
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                 "_boost_TEST_VERSIONS = ${_boost_TEST_VERSIONS}")
endif()

# ------------------------------------------------------------------------
#  Search for Boost include DIR
# ------------------------------------------------------------------------

set(_Boost_VARS_INC BOOST_INCLUDEDIR Boost_INCLUDE_DIR Boost_ADDITIONAL_VERSIONS)
_Boost_CHANGE_DETECT(_Boost_CHANGE_INCDIR ${_Boost_VARS_DIR} ${_Boost_VARS_INC})
# Clear Boost_INCLUDE_DIR if it did not change but other input affecting the
# location did.  We will find a new one based on the new inputs.
if(_Boost_CHANGE_INCDIR AND NOT _Boost_INCLUDE_DIR_CHANGED)
  unset(Boost_INCLUDE_DIR CACHE)
endif()

if(NOT Boost_INCLUDE_DIR)
  set(_boost_INCLUDE_SEARCH_DIRS "")
  if(BOOST_INCLUDEDIR)
    list(APPEND _boost_INCLUDE_SEARCH_DIRS ${BOOST_INCLUDEDIR})
  elseif(_ENV_BOOST_INCLUDEDIR)
    list(APPEND _boost_INCLUDE_SEARCH_DIRS ${_ENV_BOOST_INCLUDEDIR})
  endif()

  if( BOOST_ROOT )
    list(APPEND _boost_INCLUDE_SEARCH_DIRS ${BOOST_ROOT}/include ${BOOST_ROOT})
  elseif( _ENV_BOOST_ROOT )
    list(APPEND _boost_INCLUDE_SEARCH_DIRS ${_ENV_BOOST_ROOT}/include ${_ENV_BOOST_ROOT})
  endif()

  if( Boost_NO_SYSTEM_PATHS)
    list(APPEND _boost_INCLUDE_SEARCH_DIRS NO_CMAKE_SYSTEM_PATH)
  else()
    list(APPEND _boost_INCLUDE_SEARCH_DIRS PATHS
      C:/boost/include
      C:/boost
      /sw/local/include
      )
  endif()

  # Try to find Boost by stepping backwards through the Boost versions
  # we know about.
  # Build a list of path suffixes for each version.
  set(_boost_PATH_SUFFIXES)
  foreach(_boost_VER ${_boost_TEST_VERSIONS})
    # Add in a path suffix, based on the required version, ideally
    # we could read this from version.hpp, but for that to work we'd
    # need to know the include dir already
    set(_boost_BOOSTIFIED_VERSION)

    # Transform 1.35 => 1_35 and 1.36.0 => 1_36_0
    if(_boost_VER MATCHES "[0-9]+\\.[0-9]+\\.[0-9]+")
        string(REGEX REPLACE "([0-9]+)\\.([0-9]+)\\.([0-9]+)" "\\1_\\2_\\3"
          _boost_BOOSTIFIED_VERSION ${_boost_VER})
    elseif(_boost_VER MATCHES "[0-9]+\\.[0-9]+")
        string(REGEX REPLACE "([0-9]+)\\.([0-9]+)" "\\1_\\2"
          _boost_BOOSTIFIED_VERSION ${_boost_VER})
    endif()

    list(APPEND _boost_PATH_SUFFIXES
      "boost-${_boost_BOOSTIFIED_VERSION}"
      "boost_${_boost_BOOSTIFIED_VERSION}"
      "boost/boost-${_boost_BOOSTIFIED_VERSION}"
      "boost/boost_${_boost_BOOSTIFIED_VERSION}"
      )

  endforeach()

  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "Include debugging info:")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "  _boost_INCLUDE_SEARCH_DIRS = ${_boost_INCLUDE_SEARCH_DIRS}")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "  _boost_PATH_SUFFIXES = ${_boost_PATH_SUFFIXES}")
  endif()

  # Look for a standard boost header file.
  find_path(Boost_INCLUDE_DIR
    NAMES         boost/config.hpp
    HINTS         ${_boost_INCLUDE_SEARCH_DIRS}
    PATH_SUFFIXES ${_boost_PATH_SUFFIXES}
    )
endif()

# ------------------------------------------------------------------------
#  Extract version information from version.hpp
# ------------------------------------------------------------------------

# Set Boost_FOUND based only on header location and version.
# It will be updated below for component libraries.
if(Boost_INCLUDE_DIR)
  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "location of version.hpp: ${Boost_INCLUDE_DIR}/boost/version.hpp")
  endif()

  # Extract Boost_VERSION and Boost_LIB_VERSION from version.hpp
  set(Boost_VERSION 0)
  set(Boost_LIB_VERSION "")
  file(STRINGS "${Boost_INCLUDE_DIR}/boost/version.hpp" _boost_VERSION_HPP_CONTENTS REGEX "#define BOOST_(LIB_)?VERSION ")
  set(_Boost_VERSION_REGEX "([0-9]+)")
  set(_Boost_LIB_VERSION_REGEX "\"([0-9_]+)\"")
  foreach(v VERSION LIB_VERSION)
    if("${_boost_VERSION_HPP_CONTENTS}" MATCHES ".*#define BOOST_${v} ${_Boost_${v}_REGEX}.*")
      set(Boost_${v} "${CMAKE_MATCH_1}")
    endif()
  endforeach()
  unset(_boost_VERSION_HPP_CONTENTS)

  math(EXPR Boost_MAJOR_VERSION "${Boost_VERSION} / 100000")
  math(EXPR Boost_MINOR_VERSION "${Boost_VERSION} / 100 % 1000")
  math(EXPR Boost_SUBMINOR_VERSION "${Boost_VERSION} % 100")

  set(Boost_ERROR_REASON
    "${Boost_ERROR_REASON}Boost version: ${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION}.${Boost_SUBMINOR_VERSION}\nBoost include path: ${Boost_INCLUDE_DIR}")
  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "version.hpp reveals boost "
                   "${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION}.${Boost_SUBMINOR_VERSION}")
  endif()

  if(Boost_FIND_VERSION)
    # Set Boost_FOUND based on requested version.
    set(_Boost_VERSION "${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION}.${Boost_SUBMINOR_VERSION}")
    if("${_Boost_VERSION}" VERSION_LESS "${Boost_FIND_VERSION}")
      set(Boost_FOUND 0)
      set(_Boost_VERSION_AGE "old")
    elseif(Boost_FIND_VERSION_EXACT AND
        NOT "${_Boost_VERSION}" VERSION_EQUAL "${Boost_FIND_VERSION}")
      set(Boost_FOUND 0)
      set(_Boost_VERSION_AGE "new")
    else()
      set(Boost_FOUND 1)
    endif()
    if(NOT Boost_FOUND)
      # State that we found a version of Boost that is too new or too old.
      set(Boost_ERROR_REASON
        "${Boost_ERROR_REASON}\nDetected version of Boost is too ${_Boost_VERSION_AGE}. Requested version was ${Boost_FIND_VERSION_MAJOR}.${Boost_FIND_VERSION_MINOR}")
      if (Boost_FIND_VERSION_PATCH)
        set(Boost_ERROR_REASON
          "${Boost_ERROR_REASON}.${Boost_FIND_VERSION_PATCH}")
      endif ()
      if (NOT Boost_FIND_VERSION_EXACT)
        set(Boost_ERROR_REASON "${Boost_ERROR_REASON} (or newer)")
      endif ()
      set(Boost_ERROR_REASON "${Boost_ERROR_REASON}.")
    endif ()
  else()
    # Caller will accept any Boost version.
    set(Boost_FOUND 1)
  endif()
else()
  set(Boost_FOUND 0)
  set(Boost_ERROR_REASON
    "${Boost_ERROR_REASON}Unable to find the Boost header files. Please set BOOST_ROOT to the root directory containing Boost or BOOST_INCLUDEDIR to the directory containing Boost's headers.")
endif()

# ------------------------------------------------------------------------
#  Suffix initialization and compiler suffix detection.
# ------------------------------------------------------------------------

set(_Boost_VARS_NAME
  Boost_COMPILER
  Boost_THREADAPI
  Boost_USE_DEBUG_PYTHON
  Boost_USE_MULTITHREADED
  Boost_USE_STATIC_LIBS
  Boost_USE_STATIC_RUNTIME
  Boost_USE_STLPORT
  Boost_USE_STLPORT_DEPRECATED_NATIVE_IOSTREAMS
  )
_Boost_CHANGE_DETECT(_Boost_CHANGE_LIBNAME ${_Boost_VARS_NAME})

# Setting some more suffixes for the library
set(Boost_LIB_PREFIX "")
if ( WIN32 AND Boost_USE_STATIC_LIBS AND NOT CYGWIN)
  set(Boost_LIB_PREFIX "lib")
endif()

if (Boost_COMPILER)
  set(_boost_COMPILER ${Boost_COMPILER})
  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "using user-specified Boost_COMPILER = ${_boost_COMPILER}")
  endif()
else()
  # Attempt to guess the compiler suffix
  # NOTE: this is not perfect yet, if you experience any issues
  # please report them and use the Boost_COMPILER variable
  # to work around the problems.
  _Boost_GUESS_COMPILER_PREFIX(_boost_COMPILER)
  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
      "guessed _boost_COMPILER = ${_boost_COMPILER}")
  endif()
endif()

set (_boost_MULTITHREADED "-mt")
if( NOT Boost_USE_MULTITHREADED )
  set (_boost_MULTITHREADED "")
endif()
if(Boost_DEBUG)
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
    "_boost_MULTITHREADED = ${_boost_MULTITHREADED}")
endif()

#======================
# Systematically build up the Boost ABI tag
# http://boost.org/doc/libs/1_41_0/more/getting_started/windows.html#library-naming
set( _boost_RELEASE_ABI_TAG "-")
set( _boost_DEBUG_ABI_TAG   "-")
# Key       Use this library when:
#  s        linking statically to the C++ standard library and
#           compiler runtime support libraries.
if(Boost_USE_STATIC_RUNTIME)
  set( _boost_RELEASE_ABI_TAG "${_boost_RELEASE_ABI_TAG}s")
  set( _boost_DEBUG_ABI_TAG   "${_boost_DEBUG_ABI_TAG}s")
endif()
#  g        using debug versions of the standard and runtime
#           support libraries
if(WIN32)
  if(MSVC OR "${CMAKE_CXX_COMPILER}" MATCHES "icl"
          OR "${CMAKE_CXX_COMPILER}" MATCHES "icpc")
    set(_boost_DEBUG_ABI_TAG "${_boost_DEBUG_ABI_TAG}g")
  endif()
endif()
#  y        using special debug build of python
if(Boost_USE_DEBUG_PYTHON)
  set(_boost_DEBUG_ABI_TAG "${_boost_DEBUG_ABI_TAG}y")
endif()
#  d        using a debug version of your code
set(_boost_DEBUG_ABI_TAG "${_boost_DEBUG_ABI_TAG}d")
#  p        using the STLport standard library rather than the
#           default one supplied with your compiler
if(Boost_USE_STLPORT)
  set( _boost_RELEASE_ABI_TAG "${_boost_RELEASE_ABI_TAG}p")
  set( _boost_DEBUG_ABI_TAG   "${_boost_DEBUG_ABI_TAG}p")
endif()
#  n        using the STLport deprecated "native iostreams" feature
if(Boost_USE_STLPORT_DEPRECATED_NATIVE_IOSTREAMS)
  set( _boost_RELEASE_ABI_TAG "${_boost_RELEASE_ABI_TAG}n")
  set( _boost_DEBUG_ABI_TAG   "${_boost_DEBUG_ABI_TAG}n")
endif()

if(Boost_DEBUG)
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
    "_boost_RELEASE_ABI_TAG = ${_boost_RELEASE_ABI_TAG}")
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
    "_boost_DEBUG_ABI_TAG = ${_boost_DEBUG_ABI_TAG}")
endif()

# ------------------------------------------------------------------------
#  Begin finding boost libraries
# ------------------------------------------------------------------------
set(_Boost_VARS_LIB BOOST_LIBRARYDIR Boost_LIBRARY_DIR)
_Boost_CHANGE_DETECT(_Boost_CHANGE_LIBDIR ${_Boost_VARS_DIR} ${_Boost_VARS_LIB} Boost_INCLUDE_DIR)
# Clear Boost_LIBRARY_DIR if it did not change but other input affecting the
# location did.  We will find a new one based on the new inputs.
if(_Boost_CHANGE_LIBDIR AND NOT _Boost_LIBRARY_DIR_CHANGED)
  unset(Boost_LIBRARY_DIR CACHE)
endif()

if(Boost_LIBRARY_DIR)
  set(_boost_LIBRARY_SEARCH_DIRS ${Boost_LIBRARY_DIR} NO_DEFAULT_PATH)
else()
  set(_boost_LIBRARY_SEARCH_DIRS "")
  if(BOOST_LIBRARYDIR)
    list(APPEND _boost_LIBRARY_SEARCH_DIRS ${BOOST_LIBRARYDIR})
  elseif(_ENV_BOOST_LIBRARYDIR)
    list(APPEND _boost_LIBRARY_SEARCH_DIRS ${_ENV_BOOST_LIBRARYDIR})
  endif()

  if(BOOST_ROOT)
    list(APPEND _boost_LIBRARY_SEARCH_DIRS ${BOOST_ROOT}/lib ${BOOST_ROOT}/stage/lib)
  elseif(_ENV_BOOST_ROOT)
    list(APPEND _boost_LIBRARY_SEARCH_DIRS ${_ENV_BOOST_ROOT}/lib ${_ENV_BOOST_ROOT}/stage/lib)
  endif()

  list(APPEND _boost_LIBRARY_SEARCH_DIRS
    ${Boost_INCLUDE_DIR}/lib
    ${Boost_INCLUDE_DIR}/../lib
    ${Boost_INCLUDE_DIR}/stage/lib
    )
  if( Boost_NO_SYSTEM_PATHS )
    list(APPEND _boost_LIBRARY_SEARCH_DIRS NO_CMAKE_SYSTEM_PATH)
  else()
    list(APPEND _boost_LIBRARY_SEARCH_DIRS PATHS
      C:/boost/lib
      C:/boost
      /sw/local/lib
      )
  endif()
endif()

if(Boost_DEBUG)
  message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
    "_boost_LIBRARY_SEARCH_DIRS = ${_boost_LIBRARY_SEARCH_DIRS}")
endif()

# Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES
if( Boost_USE_STATIC_LIBS )
  set( _boost_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
  if(WIN32)
    set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
  else()
    set(CMAKE_FIND_LIBRARY_SUFFIXES .a )
  endif()
endif()

# We want to use the tag inline below without risking double dashes
if(_boost_RELEASE_ABI_TAG)
  if(${_boost_RELEASE_ABI_TAG} STREQUAL "-")
    set(_boost_RELEASE_ABI_TAG "")
  endif()
endif()
if(_boost_DEBUG_ABI_TAG)
  if(${_boost_DEBUG_ABI_TAG} STREQUAL "-")
    set(_boost_DEBUG_ABI_TAG "")
  endif()
endif()

# The previous behavior of FindBoost when Boost_USE_STATIC_LIBS was enabled
# on WIN32 was to:
#  1. Search for static libs compiled against a SHARED C++ standard runtime library (use if found)
#  2. Search for static libs compiled against a STATIC C++ standard runtime library (use if found)
# We maintain this behavior since changing it could break people's builds.
# To disable the ambiguous behavior, the user need only
# set Boost_USE_STATIC_RUNTIME either ON or OFF.
set(_boost_STATIC_RUNTIME_WORKAROUND false)
if(WIN32 AND Boost_USE_STATIC_LIBS)
  if(NOT DEFINED Boost_USE_STATIC_RUNTIME)
    set(_boost_STATIC_RUNTIME_WORKAROUND true)
  endif()
endif()

# On versions < 1.35, remove the System library from the considered list
# since it wasn't added until 1.35.
if(Boost_VERSION AND Boost_FIND_COMPONENTS)
   if(Boost_VERSION LESS 103500)
     list(REMOVE_ITEM Boost_FIND_COMPONENTS system)
   endif()
endif()

# If the user changed any of our control inputs flush previous results.
if(_Boost_CHANGE_LIBDIR OR _Boost_CHANGE_LIBNAME)
  foreach(COMPONENT ${_Boost_COMPONENTS_SEARCHED})
    string(TOUPPER ${COMPONENT} UPPERCOMPONENT)
    foreach(c DEBUG RELEASE)
      set(_var Boost_${UPPERCOMPONENT}_LIBRARY_${c})
      unset(${_var} CACHE)
      set(${_var} "${_var}-NOTFOUND")
    endforeach()
  endforeach()
  set(_Boost_COMPONENTS_SEARCHED "")
endif()

foreach(COMPONENT ${Boost_FIND_COMPONENTS})
  string(TOUPPER ${COMPONENT} UPPERCOMPONENT)

  set( _boost_docstring_release "Boost ${COMPONENT} library (release)")
  set( _boost_docstring_debug   "Boost ${COMPONENT} library (debug)")

  #
  # Find RELEASE libraries
  #
  set(_boost_RELEASE_NAMES
    ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_RELEASE_ABI_TAG}-${Boost_LIB_VERSION}
    ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_RELEASE_ABI_TAG}
    ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_RELEASE_ABI_TAG}-${Boost_LIB_VERSION}
    ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_RELEASE_ABI_TAG}
    ${Boost_LIB_PREFIX}boost_${COMPONENT} )
  if(_boost_STATIC_RUNTIME_WORKAROUND)
    set(_boost_RELEASE_STATIC_ABI_TAG "-s${_boost_RELEASE_ABI_TAG}")
    list(APPEND _boost_RELEASE_NAMES
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_RELEASE_STATIC_ABI_TAG}-${Boost_LIB_VERSION}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_RELEASE_STATIC_ABI_TAG}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_RELEASE_STATIC_ABI_TAG}-${Boost_LIB_VERSION}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_RELEASE_STATIC_ABI_TAG} )
  endif()
  if(Boost_THREADAPI AND ${COMPONENT} STREQUAL "thread")
     _Boost_PREPEND_LIST_WITH_THREADAPI(_boost_RELEASE_NAMES ${_boost_RELEASE_NAMES})
  endif()
  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "Searching for ${UPPERCOMPONENT}_LIBRARY_RELEASE: ${_boost_RELEASE_NAMES}")
  endif()

  # Avoid passing backslashes to _Boost_FIND_LIBRARY due to macro re-parsing.
  string(REPLACE "\\" "/" _boost_LIBRARY_SEARCH_DIRS_tmp "${_boost_LIBRARY_SEARCH_DIRS}")

  _Boost_FIND_LIBRARY(Boost_${UPPERCOMPONENT}_LIBRARY_RELEASE
    NAMES ${_boost_RELEASE_NAMES}
    HINTS ${_boost_LIBRARY_SEARCH_DIRS_tmp}
    NAMES_PER_DIR
    DOC "${_boost_docstring_release}"
    )

  #
  # Find DEBUG libraries
  #
  set(_boost_DEBUG_NAMES
    ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_DEBUG_ABI_TAG}-${Boost_LIB_VERSION}
    ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_DEBUG_ABI_TAG}
    ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_DEBUG_ABI_TAG}-${Boost_LIB_VERSION}
    ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_DEBUG_ABI_TAG}
    ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}
    ${Boost_LIB_PREFIX}boost_${COMPONENT} )
  if(_boost_STATIC_RUNTIME_WORKAROUND)
    set(_boost_DEBUG_STATIC_ABI_TAG "-s${_boost_DEBUG_ABI_TAG}")
    list(APPEND _boost_DEBUG_NAMES
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_DEBUG_STATIC_ABI_TAG}-${Boost_LIB_VERSION}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_DEBUG_STATIC_ABI_TAG}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_DEBUG_STATIC_ABI_TAG}-${Boost_LIB_VERSION}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_DEBUG_STATIC_ABI_TAG} )
  endif()
  if(Boost_THREADAPI AND ${COMPONENT} STREQUAL "thread")
     _Boost_PREPEND_LIST_WITH_THREADAPI(_boost_DEBUG_NAMES ${_boost_DEBUG_NAMES})
  endif()
  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "Searching for ${UPPERCOMPONENT}_LIBRARY_DEBUG: ${_boost_DEBUG_NAMES}")
  endif()

  # Avoid passing backslashes to _Boost_FIND_LIBRARY due to macro re-parsing.
  string(REPLACE "\\" "/" _boost_LIBRARY_SEARCH_DIRS_tmp "${_boost_LIBRARY_SEARCH_DIRS}")

  _Boost_FIND_LIBRARY(Boost_${UPPERCOMPONENT}_LIBRARY_DEBUG
    NAMES ${_boost_DEBUG_NAMES}
    HINTS ${_boost_LIBRARY_SEARCH_DIRS_tmp}
    NAMES_PER_DIR
    DOC "${_boost_docstring_debug}"
    )

  if(Boost_REALPATH)
    _Boost_SWAP_WITH_REALPATH(Boost_${UPPERCOMPONENT}_LIBRARY_RELEASE "${_boost_docstring_release}")
    _Boost_SWAP_WITH_REALPATH(Boost_${UPPERCOMPONENT}_LIBRARY_DEBUG   "${_boost_docstring_debug}"  )
  endif()

  _Boost_ADJUST_LIB_VARS(${UPPERCOMPONENT})

endforeach()

# Restore the original find library ordering
if( Boost_USE_STATIC_LIBS )
  set(CMAKE_FIND_LIBRARY_SUFFIXES ${_boost_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})
endif()

# ------------------------------------------------------------------------
#  End finding boost libraries
# ------------------------------------------------------------------------

set(Boost_INCLUDE_DIRS ${Boost_INCLUDE_DIR})
set(Boost_LIBRARY_DIRS ${Boost_LIBRARY_DIR})

# The above setting of Boost_FOUND was based only on the header files.
# Update it for the requested component libraries.
if(Boost_FOUND)
  # The headers were found.  Check for requested component libs.
  set(_boost_CHECKED_COMPONENT FALSE)
  set(_Boost_MISSING_COMPONENTS "")
  foreach(COMPONENT ${Boost_FIND_COMPONENTS})
    string(TOUPPER ${COMPONENT} COMPONENT)
    set(_boost_CHECKED_COMPONENT TRUE)
    if(NOT Boost_${COMPONENT}_FOUND)
      string(TOLOWER ${COMPONENT} COMPONENT)
      list(APPEND _Boost_MISSING_COMPONENTS ${COMPONENT})
    endif()
  endforeach()

  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] Boost_FOUND = ${Boost_FOUND}")
  endif()

  if (_Boost_MISSING_COMPONENTS)
    set(Boost_FOUND 0)
    # We were unable to find some libraries, so generate a sensible
    # error message that lists the libraries we were unable to find.
    set(Boost_ERROR_REASON
      "${Boost_ERROR_REASON}\nCould not find the following")
    if(Boost_USE_STATIC_LIBS)
      set(Boost_ERROR_REASON "${Boost_ERROR_REASON} static")
    endif()
    set(Boost_ERROR_REASON
      "${Boost_ERROR_REASON} Boost libraries:\n")
    foreach(COMPONENT ${_Boost_MISSING_COMPONENTS})
      set(Boost_ERROR_REASON
        "${Boost_ERROR_REASON}        boost_${COMPONENT}\n")
    endforeach()

    list(LENGTH Boost_FIND_COMPONENTS Boost_NUM_COMPONENTS_WANTED)
    list(LENGTH _Boost_MISSING_COMPONENTS Boost_NUM_MISSING_COMPONENTS)
    if (${Boost_NUM_COMPONENTS_WANTED} EQUAL ${Boost_NUM_MISSING_COMPONENTS})
      set(Boost_ERROR_REASON
        "${Boost_ERROR_REASON}No Boost libraries were found. You may need to set BOOST_LIBRARYDIR to the directory containing Boost libraries or BOOST_ROOT to the location of Boost.")
    else ()
      set(Boost_ERROR_REASON
        "${Boost_ERROR_REASON}Some (but not all) of the required Boost libraries were found. You may need to install these additional Boost libraries. Alternatively, set BOOST_LIBRARYDIR to the directory containing Boost libraries or BOOST_ROOT to the location of Boost.")
    endif ()
  endif ()

  if( NOT Boost_LIBRARY_DIRS AND NOT _boost_CHECKED_COMPONENT )
    # Compatibility Code for backwards compatibility with CMake
    # 2.4's FindBoost module.

    # Look for the boost library path.
    # Note that the user may not have installed any libraries
    # so it is quite possible the Boost_LIBRARY_DIRS may not exist.
    set(_boost_LIB_DIR ${Boost_INCLUDE_DIR})

    if("${_boost_LIB_DIR}" MATCHES "boost-[0-9]+")
      get_filename_component(_boost_LIB_DIR ${_boost_LIB_DIR} PATH)
    endif()

    if("${_boost_LIB_DIR}" MATCHES "/include$")
      # Strip off the trailing "/include" in the path.
      get_filename_component(_boost_LIB_DIR ${_boost_LIB_DIR} PATH)
    endif()

    if(EXISTS "${_boost_LIB_DIR}/lib")
      set(_boost_LIB_DIR ${_boost_LIB_DIR}/lib)
    else()
      if(EXISTS "${_boost_LIB_DIR}/stage/lib")
        set(_boost_LIB_DIR ${_boost_LIB_DIR}/stage/lib)
      else()
        set(_boost_LIB_DIR "")
      endif()
    endif()

    if(_boost_LIB_DIR AND EXISTS "${_boost_LIB_DIR}")
      set(Boost_LIBRARY_DIRS ${_boost_LIB_DIR})
    endif()

  endif()
else()
  # Boost headers were not found so no components were found.
  foreach(COMPONENT ${Boost_FIND_COMPONENTS})
    string(TOUPPER ${COMPONENT} UPPERCOMPONENT)
    set(Boost_${UPPERCOMPONENT}_FOUND 0)
  endforeach()
endif()

# ------------------------------------------------------------------------
#  Notification to end user about what was found
# ------------------------------------------------------------------------

set(Boost_LIBRARIES "")
if(Boost_FOUND)
  if(NOT Boost_FIND_QUIETLY)
    message(STATUS "Boost version: ${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION}.${Boost_SUBMINOR_VERSION}")
    if(Boost_FIND_COMPONENTS)
      message(STATUS "Found the following Boost libraries:")
    endif()
  endif()
  foreach( COMPONENT  ${Boost_FIND_COMPONENTS} )
    string( TOUPPER ${COMPONENT} UPPERCOMPONENT )
    if( Boost_${UPPERCOMPONENT}_FOUND )
      if(NOT Boost_FIND_QUIETLY)
        message (STATUS "  ${COMPONENT}")
      endif()
      list(APPEND Boost_LIBRARIES ${Boost_${UPPERCOMPONENT}_LIBRARY})
    endif()
  endforeach()
else()
  if(Boost_FIND_REQUIRED)
    message(SEND_ERROR "Unable to find the requested Boost libraries.\n${Boost_ERROR_REASON}")
  else()
    if(NOT Boost_FIND_QUIETLY)
      # we opt not to automatically output Boost_ERROR_REASON here as
      # it could be quite lengthy and somewhat imposing in its requests
      # Since Boost is not always a required dependency we'll leave this
      # up to the end-user.
      if(Boost_DEBUG OR Boost_DETAILED_FAILURE_MSG)
        message(STATUS "Could NOT find Boost\n${Boost_ERROR_REASON}")
      else()
        message(STATUS "Could NOT find Boost")
      endif()
    endif()
  endif()
endif()

# Configure display of cache entries in GUI.
foreach(v BOOSTROOT BOOST_ROOT ${_Boost_VARS_INC} ${_Boost_VARS_LIB})
  get_property(_type CACHE ${v} PROPERTY TYPE)
  if(_type)
    set_property(CACHE ${v} PROPERTY ADVANCED 1)
    if("x${_type}" STREQUAL "xUNINITIALIZED")
      if("x${v}" STREQUAL "xBoost_ADDITIONAL_VERSIONS")
        set_property(CACHE ${v} PROPERTY TYPE STRING)
      else()
        set_property(CACHE ${v} PROPERTY TYPE PATH)
      endif()
    endif()
  endif()
endforeach()

# Record last used values of input variables so we can
# detect on the next run if the user changed them.
foreach(v
    ${_Boost_VARS_INC} ${_Boost_VARS_LIB}
    ${_Boost_VARS_DIR} ${_Boost_VARS_NAME}
    )
  if(DEFINED ${v})
    set(_${v}_LAST "${${v}}" CACHE INTERNAL "Last used ${v} value.")
  else()
    unset(_${v}_LAST CACHE)
  endif()
endforeach()

# Maintain a persistent list of components requested anywhere since
# the last flush.
set(_Boost_COMPONENTS_SEARCHED "${_Boost_COMPONENTS_SEARCHED}")
list(APPEND _Boost_COMPONENTS_SEARCHED ${Boost_FIND_COMPONENTS})
list(REMOVE_DUPLICATES _Boost_COMPONENTS_SEARCHED)
list(SORT _Boost_COMPONENTS_SEARCHED)
set(_Boost_COMPONENTS_SEARCHED "${_Boost_COMPONENTS_SEARCHED}"
  CACHE INTERNAL "Components requested for this build tree.")