[svn-r26333] Eliminates gcc warnings due to -Wunsuffixed-float-constants.

- Adds 'F' suffixes for most float constants.

- A few constants MUST be of type double. These now receive the long
  double L suffix and are then cast to double. I do this via a new
  H5_DOUBLE() macro which was added to H5private.h.

Fixes: HDFFV-9148

Tested on: h5committest

24 files changed, 145 insertions, 130 deletions

diff --git a/test/cache.c b/test/cache.c
index 5ad1314..8725b31 100644
--- a/test/cache.c
+++ b/test/cache.c
@@ -20340,7 +20340,10 @@ check_auto_cache_resize(void)
 
         auto_size_ctl.decr_mode              = H5C_decr__age_out_with_threshold;
 
-        auto_size_ctl.upper_hr_threshold     = 0.999; /* for ease of testing */
+        /* NOTE: upper_hr_threshold MUST be type double (not float)
+         * or the cache test will fail on 64-bit systems.
+         */
+        auto_size_ctl.upper_hr_threshold     = H5_DOUBLE(0.999); /* for ease of testing */
 
         auto_size_ctl.decrement              = 0.5f;
 
@@ -28353,7 +28356,7 @@ check_auto_cache_resize_aux_fcns(void)
             pass = FALSE;
             failure_mssg = "H5C_get_cache_hit_rate failed.\n";
 
-        } else if ( ! DBL_REL_EQUAL(hit_rate, 0.5, FP_EPSILON) ) { /* i.e. hit_rate != 0.5 */
+        } else if ( ! DBL_REL_EQUAL(hit_rate, 0.5F, FP_EPSILON) ) { /* i.e. hit_rate != 0.5 */
 
             pass = FALSE;
             failure_mssg =
diff --git a/test/cache_api.c b/test/cache_api.c
index b1ccef1..8f556be 100644
--- a/test/cache_api.c
+++ b/test/cache_api.c
@@ -2173,7 +2173,7 @@ H5AC_cache_config_t invalid_configs[NUM_INVALID_CONFIGS] =
     /* long int    epoch_length           = */ 50000,
     /* enum H5C_cache_incr_mode incr_mode = */ H5C_incr__threshold,
     /* double      lower_hr_threshold     = */ 0.9f,
-    /* double      increment              = */ 0.999999999999,
+    /* double      increment              = */ H5_DOUBLE(0.999999999999),
     /* hbool_t     apply_max_increment    = */ TRUE,
     /* size_t      max_increment          = */ (4 * 1024 * 1024),
     /* enum H5C_cache_flash_incr_mode       */
@@ -2532,7 +2532,7 @@ H5AC_cache_config_t invalid_configs[NUM_INVALID_CONFIGS] =
     /* double      flash_threshold        = */ 0.5f,
     /* enum H5C_cache_decr_mode decr_mode = */ H5C_decr__threshold,
     /* double      upper_hr_threshold     = */ 0.999f,
-    /* double      decrement              = */ 1.0000000001,
+    /* double      decrement              = */ H5_DOUBLE(1.0000000001),
     /* hbool_t     apply_max_decrement    = */ TRUE,
     /* size_t      max_decrement          = */ (1 * 1024 * 1024),
     /* int         epochs_before_eviction = */ 3,
@@ -2712,7 +2712,7 @@ H5AC_cache_config_t invalid_configs[NUM_INVALID_CONFIGS] =
     /* size_t      max_decrement          = */ (1 * 1024 * 1024),
     /* int         epochs_before_eviction = */ 3,
     /* hbool_t     apply_empty_reserve    = */ TRUE,
-    /* double      empty_reserve          = */ 1.00000000001,
+    /* double      empty_reserve          = */ H5_DOUBLE(1.00000000001),
     /* int         dirty_bytes_threshold  = */ (256 * 1024),
     /* int	  metadata_write_strategy = */
 				      H5AC__DEFAULT_METADATA_WRITE_STRATEGY
@@ -2776,7 +2776,7 @@ H5AC_cache_config_t invalid_configs[NUM_INVALID_CONFIGS] =
     /* double      flash_multiple         = */ 2.0f,
     /* double      flash_threshold        = */ 0.5f,
     /* enum H5C_cache_decr_mode decr_mode = */ H5C_decr__age_out_with_threshold,
-    /* double      upper_hr_threshold     = */ 1.00000001,
+    /* double      upper_hr_threshold     = */ H5_DOUBLE(1.00000001),
     /* double      decrement              = */ 0.9f,
     /* hbool_t     apply_max_decrement    = */ TRUE,
     /* size_t      max_decrement          = */ (1 * 1024 * 1024),
diff --git a/test/cache_common.c b/test/cache_common.c
index 7b26714..0231a11 100644
--- a/test/cache_common.c
+++ b/test/cache_common.c
@@ -5161,7 +5161,7 @@ check_and_validate_cache_hit_rate(hid_t file_id,
 
         } else {
 
-            expected_hit_rate = 0.0;
+            expected_hit_rate = 0.0F;
         }
 
         result = H5Fget_mdc_hit_rate(file_id, &hit_rate);
@@ -5171,7 +5171,7 @@ check_and_validate_cache_hit_rate(hid_t file_id,
             pass = FALSE;
             failure_mssg = "H5Fget_mdc_hit_rate() failed.";
 
-        } else if ( ! DBL_REL_EQUAL(hit_rate, expected_hit_rate, 0.00001) ) {
+        } else if ( ! DBL_REL_EQUAL(hit_rate, expected_hit_rate, 0.00001F) ) {
 
             pass = FALSE;
             failure_mssg = "unexpected hit rate.";
diff --git a/test/cross_read.c b/test/cross_read.c
index 2d95d15..35dd2ce 100644
--- a/test/cross_read.c
+++ b/test/cross_read.c
@@ -100,15 +100,15 @@ static int check_data(const char *dsetname, hid_t fid, hbool_t floating_number)
     for (j = 0; j < NX; j++) {
         for (i = 0; i < NY; i++) {
             data_in[j][i] = ((double)(i + j + 1))/3;
-            data_out[j][i] = 0;
+            data_out[j][i] = 0.0F;
 
             int_data_in[j][i] = i + j;
             int_data_out[j][i] = 0;
         }
     }
     for (i = 0; i < NY; i++) {
-        data_in[NX][i] = -2.2;
-        data_out[NX][i] = 0;
+        data_in[NX][i] = -2.2F;
+        data_out[NX][i] = 0.0F;
 
         int_data_in[NX][i] = -2;
         int_data_out[NX][i] = 0;
@@ -126,7 +126,7 @@ static int check_data(const char *dsetname, hid_t fid, hbool_t floating_number)
 	/* Check results */
 	for (j=0; j<(NX+1); j++) {
 	    for (i=0; i<NY; i++) {
-		if (!DBL_REL_EQUAL(data_out[j][i], data_in[j][i], 0.001)) {
+		if (!DBL_REL_EQUAL(data_out[j][i], data_in[j][i], 0.001F)) {
 		    if (!nerrors++) {
 			H5_FAILED();
 			printf("element [%d][%d] is %g but should have been %g\n",
diff --git a/test/dsets.c b/test/dsets.c
index c782e70..3244bd6 100644
--- a/test/dsets.c
+++ b/test/dsets.c
@@ -2814,8 +2814,8 @@ test_nbit_float(hid_t file)
     /* orig_data[] are initialized to be within the range that can be represented by
      * dataset datatype (no precision loss during datatype conversion)
      */
-    float               orig_data[2][5] = {{(float)188384.00f, (float)19.103516f, (float)-1.0831790e9f, (float)-84.242188f,
-    (float)5.2045898f}, {(float)-49140.000f, (float)2350.2500f, (float)-3.2110596e-1f, (float)6.4998865e-5f, (float)-0.0000000f}};
+    float               orig_data[2][5] = {{188384.0f, 19.103516f, -1.0831790e9f, -84.242188f, 5.2045898f},
+                                           {-49140.0f, 2350.25f, -3.2110596e-1f, 6.4998865e-5f, -0.0f}};
     float               new_data[2][5];
     size_t              precision, offset;
     size_t             i, j;
@@ -2926,9 +2926,21 @@ test_nbit_double(hid_t file)
     /* orig_data[] are initialized to be within the range that can be represented by
      * dataset datatype (no precision loss during datatype conversion)
      */
-    double              orig_data[2][5] = {{1.6081706885101836e+60, -255.32099170994480,
-    1.2677579992621376e-61, 64568.289448797700, -1.0619721778839084e-75}, {2.1499497833454840e+56,
-    6.6562295504670740e-3, -1.5747263393432150, 1.0711093225222612, -9.8971679387636870e-1}};
+    double              orig_data[2][5] = {
+        {
+            H5_DOUBLE(1.6081706885101836e+60),
+            H5_DOUBLE(-255.32099170994480),
+            H5_DOUBLE(1.2677579992621376e-61),
+            H5_DOUBLE(64568.289448797700),
+            H5_DOUBLE(-1.0619721778839084e-75)
+        }, 
+        {
+            H5_DOUBLE(2.1499497833454840e+56),
+            H5_DOUBLE(6.6562295504670740e-3), 
+            H5_DOUBLE(-1.5747263393432150), 
+            H5_DOUBLE(1.0711093225222612), 
+            H5_DOUBLE(-9.8971679387636870e-1)
+        }};
     double              new_data[2][5];
     size_t              precision, offset;
     size_t             i, j;
@@ -3081,7 +3093,7 @@ test_nbit_array(hid_t file)
         for(m = 0; m < (size_t)adims[0]; m++)
           for(n = 0; n < (size_t)adims[1]; n++)
             orig_data[i][j][m][n] = (unsigned int)(((long long)HDrandom() %
-                                     (long long)HDpow(2.0, (double)precision)) << offset);
+                                     (long long)HDpow(2.0F, (double)precision)) << offset);
     PASSED();
 
     /*----------------------------------------------------------------------
@@ -3175,8 +3187,8 @@ test_nbit_compound(hid_t file)
     hid_t               dataset, space, dc;
     const hsize_t       size[2] = {2, 5};
     const hsize_t       chunk_size[2] = {2, 5};
-    const float         float_val[2][5] = {{(float)188384.00, (float)19.103516, (float)-1.0831790e9, (float)-84.242188,
-    (float)5.2045898}, {(float)-49140.000, (float)2350.2500, (float)-3.2110596e-1, (float)6.4998865e-5, (float)-0.0000000}};
+    const float         float_val[2][5] = {{188384.0F, 19.103516F, -1.0831790e9F, -84.242188F, 5.2045898F}, 
+                                           {-49140.0F, 2350.25F, -3.2110596e-1F, 6.4998865e-5F, -0.0F}};
     atomic              orig_data[2][5];
     atomic              new_data[2][5];
     unsigned int        i_mask, s_mask, c_mask;
@@ -3240,11 +3252,11 @@ test_nbit_compound(hid_t file)
     for(i= 0;i< (size_t)size[0]; i++)
       for(j = 0; j < (size_t)size[1]; j++) {
         orig_data[i][j].i = (int)(((long long)HDrandom() %
-                             (long long)HDpow(2.0, (double)(precision[0]-1))) << offset[0]);
+                             (long long)HDpow(2.0F, (double)(precision[0]-1))) << offset[0]);
         orig_data[i][j].c = (char)(((long long)HDrandom() %
-                             (long long)HDpow(2.0, (double)(precision[1]-1))) << offset[1]);
+                             (long long)HDpow(2.0F, (double)(precision[1]-1))) << offset[1]);
         orig_data[i][j].s = (short)(((long long)HDrandom() %
-                             (long long)HDpow(2.0, (double)(precision[2]-1))) << offset[2]);
+                             (long long)HDpow(2.0F, (double)(precision[2]-1))) << offset[2]);
         orig_data[i][j].f = float_val[i][j];
 
         /* some even-numbered integer values are negtive */
@@ -3369,8 +3381,8 @@ test_nbit_compound_2(hid_t file)
     hid_t               dataset, space, dc;
     const hsize_t       size[2] = {2, 5};
     const hsize_t       chunk_size[2] = {2, 5};
-    const float         float_val[2][5] = {{(float)188384.00, (float)19.103516, (float)-1.0831790e9, (float)-84.242188,
-    (float)5.2045898}, {(float)-49140.000, (float)2350.2500, (float)-3.2110596e-1, (float)6.4998865e-5, (float)-0.0000000}};
+    const float         float_val[2][5] = {{188384.0F, 19.103516F, -1.0831790e9F, -84.242188F, 5.2045898F},
+                                           {-49140.0F, 2350.25F, -3.2110596e-1F, 6.4998865e-5F, -0.0F}};
     complex             orig_data[2][5];
     complex             new_data[2][5];
     unsigned int        i_mask, s_mask, c_mask, b_mask;
@@ -3466,29 +3478,29 @@ test_nbit_compound_2(hid_t file)
     for(i= 0;i< (size_t)size[0]; i++)
       for(j = 0; j < (size_t)size[1]; j++) {
         orig_data[i][j].a.i = (int)(((long long)HDrandom() %
-                               (long long)HDpow(2.0, (double)(precision[0]-1))) << offset[0]);
+                               (long long)HDpow(2.0F, (double)(precision[0]-1))) << offset[0]);
         orig_data[i][j].a.c = (char)(((long long)HDrandom() %
-                               (long long)HDpow(2.0, (double)(precision[1]-1))) << offset[1]);
+                               (long long)HDpow(2.0F, (double)(precision[1]-1))) << offset[1]);
         orig_data[i][j].a.s = (short)(-((long long)HDrandom() %
-                               (long long)HDpow(2.0, (double)(precision[2]-1))) << offset[2]);
+                               (long long)HDpow(2.0F, (double)(precision[2]-1))) << offset[2]);
         orig_data[i][j].a.f = float_val[i][j];
 
         orig_data[i][j].v = (unsigned int)(((long long)HDrandom() %
-                             (long long)HDpow(2.0, (double)precision[3])) << offset[3]);
+                             (long long)HDpow(2.0F, (double)precision[3])) << offset[3]);
 
         for(m = 0; m < (size_t)array_dims[0]; m++)
           for(n = 0; n < (size_t)array_dims[1]; n++)
             orig_data[i][j].b[m][n] = (char)(((long long)HDrandom() %
-                                       (long long)HDpow(2.0, (double)(precision[4]-1))) << offset[4]);
+                                       (long long)HDpow(2.0F, (double)(precision[4]-1))) << offset[4]);
 
         for(m = 0; m < (size_t)array_dims[0]; m++)
           for(n = 0; n < (size_t)array_dims[1]; n++) {
             orig_data[i][j].d[m][n].i = (int)(-((long long)HDrandom() %
-                                         (long long)HDpow(2.0, (double)(precision[0]-1))) << offset[0]);
+                                         (long long)HDpow(2.0F, (double)(precision[0]-1))) << offset[0]);
             orig_data[i][j].d[m][n].c = (char)(((long long)HDrandom() %
-                                         (long long)HDpow(2.0, (double)(precision[1]-1))) << offset[1]);
+                                         (long long)HDpow(2.0F, (double)(precision[1]-1))) << offset[1]);
             orig_data[i][j].d[m][n].s = (short)(((long long)HDrandom() %
-                                         (long long)HDpow(2.0, (double)(precision[2]-1))) << offset[2]);
+                                         (long long)HDpow(2.0F, (double)(precision[2]-1))) << offset[2]);
             orig_data[i][j].d[m][n].f = float_val[i][j];
           }
       }
@@ -3684,7 +3696,7 @@ test_nbit_compound_3(hid_t file)
     /* Initialize data */
     for(i = 0; i < (size_t)size[0]; i++) {
         HDmemset(&orig_data[i], 0, sizeof(orig_data[i]));
-        orig_data[i].i = HDrandom() % (long)HDpow(2.0, 17.0 - 1.0);
+        orig_data[i].i = HDrandom() % (long)HDpow(2.0F, 17.0F - 1.0F);
         HDstrcpy(orig_data[i].str, "fixed-length C string");
         orig_data[i].vl_str = HDstrdup("variable-length C string");
 
@@ -4436,7 +4448,7 @@ test_scaleoffset_float(hid_t file)
     /* Initialize data */
     for(i= 0;i< (size_t)size[0]; i++)
       for(j = 0; j < (size_t)size[1]; j++) {
-        orig_data[i][j] = (float)((HDrandom() % 100000) / (float)1000.0);
+        orig_data[i][j] = (float)((HDrandom() % 100000) / 1000.0F);
 
         /* even-numbered values are negtive */
         if((i*size[1]+j+1)%2 == 0)
@@ -4469,7 +4481,7 @@ test_scaleoffset_float(hid_t file)
     /* Check that the values read are the same as the values written */
     for(i=0; i<(size_t)size[0]; i++) {
         for(j=0; j<(size_t)size[1]; j++) {
-            if(HDfabs(new_data[i][j]-orig_data[i][j]) > HDpow(10.0, -3.0)) {
+            if(HDfabs(new_data[i][j]-orig_data[i][j]) > HDpow(10.0F, -3.0F)) {
                 H5_FAILED();
                 printf("    Read different values than written.\n");
                 printf("    At index %lu,%lu\n", (unsigned long)i, (unsigned long)j);
@@ -4539,7 +4551,7 @@ test_scaleoffset_float_2(hid_t file)
     if((dc = H5Pcreate(H5P_DATASET_CREATE)) < 0) goto error;
 
     /* Set fill value */
-    fillval = 10000.0;
+    fillval = 10000.0F;
     if(H5Pset_fill_value(dc, H5T_NATIVE_FLOAT, &fillval) < 0) goto error;
 
     /* Set up to use scaleoffset filter, decimal scale factor is 3,
@@ -4567,7 +4579,7 @@ test_scaleoffset_float_2(hid_t file)
 
     /* Initialize data of hyperslab */
     for(j = 0; j < (size_t)size[1]; j++) {
-        orig_data[0][j] = (float)((HDrandom() % 100000) / (float)1000.0);
+        orig_data[0][j] = (float)((HDrandom() % 100000) / 1000.0F);
 
         /* even-numbered values are negtive */
         if((j+1)%2 == 0)
@@ -4600,7 +4612,7 @@ test_scaleoffset_float_2(hid_t file)
 
     /* Check that the values read are the same as the values written */
     for(j=0; j<(size_t)size[1]; j++) {
-        if(HDfabs(new_data[0][j]-orig_data[0][j]) > HDpow(10.0, -3.0)) {
+        if(HDfabs(new_data[0][j]-orig_data[0][j]) > HDpow(10.0F, -3.0F)) {
             H5_FAILED();
             printf("    Read different values than written.\n");
             printf("    At index %lu,%lu\n", (unsigned long)0, (unsigned long)j);
@@ -4678,7 +4690,7 @@ test_scaleoffset_double(hid_t file)
     /* Initialize data */
     for(i= 0;i< (size_t)size[0]; i++)
       for(j = 0; j < (size_t)size[1]; j++) {
-        orig_data[i][j] = (HDrandom() % 10000000) / 10000000.0;
+        orig_data[i][j] = (HDrandom() % 10000000) / 10000000.0F;
 
         /* even-numbered values are negtive */
         if((i*size[1]+j+1)%2 == 0)
@@ -4711,7 +4723,7 @@ test_scaleoffset_double(hid_t file)
     /* Check that the values read are the same as the values written */
     for(i=0; i<(size_t)size[0]; i++) {
         for(j=0; j<(size_t)size[1]; j++) {
-            if(HDfabs(new_data[i][j]-orig_data[i][j]) > HDpow(10.0, -7.0)) {
+            if(HDfabs(new_data[i][j]-orig_data[i][j]) > HDpow(10.0F, -7.0F)) {
                 H5_FAILED();
                 printf("    Read different values than written.\n");
                 printf("    At index %lu,%lu\n", (unsigned long)i, (unsigned long)j);
@@ -4781,7 +4793,7 @@ test_scaleoffset_double_2(hid_t file)
     if((dc = H5Pcreate(H5P_DATASET_CREATE)) < 0) goto error;
 
     /* Set fill value */
-    fillval = 10000.0;
+    fillval = 10000.0F;
     if(H5Pset_fill_value(dc, H5T_NATIVE_DOUBLE, &fillval) < 0) goto error;
 
     /* Set up to use scaleoffset filter, decimal scale factor is 7,
@@ -4809,7 +4821,7 @@ test_scaleoffset_double_2(hid_t file)
 
     /* Initialize data of hyperslab */
     for(j = 0; j < (size_t)size[1]; j++) {
-        orig_data[0][j] = (HDrandom() % 10000000) / 10000000.0;
+        orig_data[0][j] = (HDrandom() % 10000000) / 10000000.0F;
 
         /* even-numbered values are negtive */
         if((j+1)%2 == 0)
@@ -4842,7 +4854,7 @@ test_scaleoffset_double_2(hid_t file)
 
     /* Check that the values read are the same as the values written */
     for(j=0; j<(size_t)size[1]; j++) {
-        if(HDfabs(new_data[0][j]-orig_data[0][j]) > HDpow(10.0, -7.0)) {
+        if(HDfabs(new_data[0][j]-orig_data[0][j]) > HDpow(10.0F, -7.0F)) {
             H5_FAILED();
             printf("    Read different values than written.\n");
             printf("    At index %lu,%lu\n", (unsigned long)0, (unsigned long)j);
@@ -5609,11 +5621,11 @@ test_set_local(hid_t fapl)
     h5_fixname(FILENAME[5], fapl, filename, sizeof filename);
 
     /* Initialize the integer & floating-point dataset */
-    n=1.0;
+    n=1.0F;
     for(i = 0; i < DSET_DIM1; i++)
 	for(j = 0; j < DSET_DIM2; j++) {
 	    points[i][j] = (int)n++;
-	    points_dbl[i][j] = (double)1.5*n++;
+	    points_dbl[i][j] = (double)1.5F*n++;
 	}
 
     /* Open file */
@@ -5807,7 +5819,7 @@ test_set_local(hid_t fapl)
 	for(j=0; j<dims[1]; j++) {
 	    /* If the difference between two values is greater than 0.001%, they're
              * considered not equal. */
-            if(!DBL_REL_EQUAL(points_dbl[i][j],check_dbl[i][j],0.00001)) {
+            if(!DBL_REL_EQUAL(points_dbl[i][j],check_dbl[i][j],0.00001F)) {
 		H5_FAILED();
 		printf("    Line %d: Read different values than written.\n",__LINE__);
 		printf("    At index %lu,%lu\n", (unsigned long)(i), (unsigned long)(j));
@@ -7130,7 +7142,7 @@ test_chunk_cache(hid_t fapl)
     /* Set new rdcc settings on fapl */
     nslots_2 = nslots_1 * 2;
     nbytes_2 = nbytes_1 * 2;
-    w0_2 = w0_1 / 2.;
+    w0_2 = w0_1 / 2.0F;
     if (H5Pset_cache(fapl_local, 0, nslots_2, nbytes_2, w0_2) < 0) FAIL_STACK_ERROR
 
     h5_fixname(FILENAME[8], fapl, filename, sizeof filename);
@@ -7325,7 +7337,7 @@ test_big_chunks_bypass_cache(hid_t fapl)
     /* Define cache size to be smaller than chunk size */
     rdcc_nelmts = BYPASS_CHUNK_DIM/5;
     rdcc_nbytes = sizeof(int)*BYPASS_CHUNK_DIM/5;
-    if(H5Pset_cache(fapl_local, 0, rdcc_nelmts, rdcc_nbytes, (double)0.0) < 0) FAIL_STACK_ERROR
+    if(H5Pset_cache(fapl_local, 0, rdcc_nelmts, rdcc_nbytes, 0.0F) < 0) FAIL_STACK_ERROR
 
     /* Create file */
     if((fid = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_local)) < 0) FAIL_STACK_ERROR
diff --git a/test/dt_arith.c b/test/dt_arith.c
index a93d1b8..17f8e55 100644
--- a/test/dt_arith.c
+++ b/test/dt_arith.c
@@ -28,7 +28,7 @@
 #define NTESTELEM	10000
 
 /* Epsilon for floating-point comparisons */
-#define FP_EPSILON 0.000001
+#define FP_EPSILON 0.000001F
 
 /*
  * Offset from alinged memory returned by malloc().  This can be used to test
@@ -3299,7 +3299,7 @@ test_conv_flt_1 (const char *name, int run_test, hid_t src, hid_t dst)
             if(check_expo[0]<(-(int)dst_ebias) || check_expo[1]<(-(int)dst_ebias)) {
                 int expo_diff=check_expo[0]-check_expo[1];
                 int valid_bits=(int)((dst_ebias+dst_msize)+MIN(check_expo[0],check_expo[1]))-1;
-                double epsilon=1.0;
+                double epsilon=1.0F;
 
                 /* Re-scale the mantissas based on any exponent difference */
                 if(expo_diff!=0)
diff --git a/test/dtransform.c b/test/dtransform.c
index 9c78043..d80c21a 100644
--- a/test/dtransform.c
+++ b/test/dtransform.c
@@ -17,7 +17,7 @@
 
 #define ROWS    12
 #define COLS    18
-#define FLOAT_TOL 0.0001
+#define FLOAT_TOL 0.0001F
 
 static int init_test(hid_t file_id);
 static int test_copy(const hid_t dxpl_id_c_to_f_copy, const hid_t dxpl_id_polynomial_copy);
diff --git a/test/fheap.c b/test/fheap.c
index 96b0673..6bcd8bf 100644
--- a/test/fheap.c
+++ b/test/fheap.c
@@ -16061,9 +16061,9 @@ test_write(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_t *tparam)
 
         /* Change size of data to write */
         if(u < 20)
-            obj_size = (size_t)(obj_size * 1.3);
+            obj_size = (size_t)(obj_size * 1.3F);
         else
-            obj_size = (size_t)(obj_size / 1.3);
+            obj_size = (size_t)(obj_size / 1.3F);
     } /* end for */
 
     /* Close the fractal heap */
@@ -16110,9 +16110,9 @@ test_write(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_t *tparam)
 
         /* Change size of data to write */
         if(u < 20)
-            obj_size = (size_t)(obj_size * 1.3);
+            obj_size = (size_t)(obj_size * 1.3F);
         else
-            obj_size = (size_t)(obj_size / 1.3);
+            obj_size = (size_t)(obj_size / 1.3F);
     } /* end for */
 
     /* Close the fractal heap */
diff --git a/test/fillval.c b/test/fillval.c
index 459620d..e6e8f8e 100644
--- a/test/fillval.c
+++ b/test/fillval.c
@@ -909,9 +909,9 @@ test_rdwr_cases(hid_t file, hid_t dcpl, const char *dname, void *_fillval,
     else if(datatype == H5T_COMPOUND) {
         HDmemset(buf_c, 0, ((size_t)nelmts * sizeof(comp_datatype)));
         for(u = 0; u < nelmts; u++) {
-	    buf_c[u].a = (float)1111.11;
+	    buf_c[u].a = 1111.11F;
  	    buf_c[u].x = 2222;
-	    buf_c[u].y = 3333.3333;
+	    buf_c[u].y = 3333.3333F;
 	    buf_c[u].z = 'd';
 	}
         if(H5Dwrite(dset2, ctype_id, mspace, fspace, H5P_DEFAULT, buf_c) < 0)
@@ -1144,7 +1144,7 @@ test_rdwr(hid_t fapl, const char *base_name, H5D_layout_t layout)
          * as compound type */
         if(H5Pset_fill_time(dcpl, H5D_FILL_TIME_ALLOC) < 0) goto error;
         HDmemset(&fill_ctype, 0, sizeof(fill_ctype));
-        fill_ctype.y = 4444.4444;
+        fill_ctype.y = 4444.4444F;
         if(H5Pset_fill_value(dcpl, ctype_id, &fill_ctype) < 0) goto error;
         nerrors += test_rdwr_cases(file, dcpl, "dset11", &fill_ctype, H5D_FILL_TIME_ALLOC,
 				layout, H5T_COMPOUND, ctype_id);
@@ -1197,7 +1197,7 @@ test_rdwr(hid_t fapl, const char *base_name, H5D_layout_t layout)
      * as compound type */
     if(H5Pset_fill_time(dcpl, H5D_FILL_TIME_ALLOC) < 0) goto error;
     HDmemset(&fill_ctype, 0, sizeof(fill_ctype));
-    fill_ctype.y = 4444.4444;
+    fill_ctype.y = 4444.4444F;
     if(H5Pset_fill_value(dcpl, ctype_id, &fill_ctype) < 0) goto error;
     nerrors += test_rdwr_cases(file, dcpl, "dset12", &fill_ctype, H5D_FILL_TIME_ALLOC,
                                 layout, H5T_COMPOUND, ctype_id);
diff --git a/test/flush2.c b/test/flush2.c
index 06dd086..8108bba 100644
--- a/test/flush2.c
+++ b/test/flush2.c
@@ -73,13 +73,13 @@ check_dset(hid_t file, const char* name)
 	     * 1998-11-06 ptl
 	     */
 	    error = fabs(the_data[i][j] - (double)(hssize_t)i / ((hssize_t)j + 1));
-	    if(error > 0.0001) {
-		H5_FAILED();
-		printf("    dset[%lu][%lu] = %g\n",
-			(unsigned long)i, (unsigned long)j, the_data[i][j]);
-		printf("    should be %g\n",
-			(double)(hssize_t)i/(hssize_t)(j+1));
-		goto error;
+	    if(error > 0.0001F) {
+		    H5_FAILED();
+		    printf("    dset[%lu][%lu] = %g\n",
+			    (unsigned long)i, (unsigned long)j, the_data[i][j]);
+		    printf("    should be %g\n",
+			    (double)(hssize_t)i/(hssize_t)(j+1));
+		    goto error;
 	    }
 	}
     if(H5Dclose(dset) < 0) goto error;
diff --git a/test/hyperslab.c b/test/hyperslab.c
index 5e2c109..9bc085c 100644
--- a/test/hyperslab.c
+++ b/test/hyperslab.c
@@ -609,10 +609,10 @@ test_multifill(size_t nx)
 
     for(i = 0; i < nx; i++) {
         src[i].left = 1111111;
-        src[i].mid = 12345.6789;
+        src[i].mid = 12345.6789F;
         src[i].right = 2222222;
         dst[i].left = 3333333;
-        dst[i].mid = 98765.4321;
+        dst[i].mid = 98765.4321F;
         dst[i].right = 4444444;
     } /* end for */
 
@@ -621,7 +621,7 @@ test_multifill(size_t nx)
      * over and over again.
      */
     fill.left = 55555555;
-    fill.mid = 3.1415927;
+    fill.mid = 3.1415927F;
     fill.right = 66666666;
     src_stride = 0;
 
diff --git a/test/links.c b/test/links.c
index 6119bb3..891b5e4 100644
--- a/test/links.c
+++ b/test/links.c
@@ -141,7 +141,7 @@ const char *FILENAME[] = {
 #define H5L_DIM1 100
 #define H5L_DIM2 100
 
-#define FILTER_FILESIZE_MAX_FRACTION .9
+#define FILTER_FILESIZE_MAX_FRACTION 0.9F
 
 /* Creation order macros */
 #define CORDER_GROUP_NAME       "corder_group"
diff --git a/test/mtime.c b/test/mtime.c
index 6e00fe0..0c0c923 100644
--- a/test/mtime.c
+++ b/test/mtime.c
@@ -114,7 +114,7 @@ main(void)
         puts("    Modification times will be mantained in the file but");
         puts("    cannot be queried on this system.  See H5O_mtime_decode().");
         return 0;
-    } else if(HDfabs(HDdifftime(now, oi1.ctime)) > 60.0) {
+    } else if(HDfabs(HDdifftime(now, oi1.ctime)) > 60.0F) {
         H5_FAILED();
         tm = HDlocaltime(&(oi1.ctime));
         HDstrftime((char*)buf1, sizeof buf1, "%Y-%m-%d %H:%M:%S", tm);
diff --git a/test/objcopy.c b/test/objcopy.c
index 0a1d7a0..71a7236 100644
--- a/test/objcopy.c
+++ b/test/objcopy.c
@@ -2315,7 +2315,7 @@ test_copy_dataset_compound(hid_t fcpl_src, hid_t fcpl_dst, hid_t src_fapl, hid_t
 #endif /* H5_CLEAR_MEMORY */
     for(i = 0; i < DIM_SIZE_1; i++) {
         buf[i].a = i;
-        buf[i].d = 1. / (i + 1);
+        buf[i].d = 1.0F / (i + 1);
     } /* end for */
 
     /* Initialize the filenames */
@@ -2447,9 +2447,9 @@ test_copy_dataset_chunked(hid_t fcpl_src, hid_t fcpl_dst, hid_t src_fapl, hid_t
 
     /* set initial data values */
     for(i = 0; i < DIM_SIZE_1; i++) {
-        buf1d[i] = (float)(i / 2.0);
+        buf1d[i] = (float)(i / 2.0F);
         for(j = 0; j < DIM_SIZE_2; j++)
-            buf2d[i][j] = (float)(i + (j / 100.0));
+            buf2d[i][j] = (float)(i + (j / 100.0F));
     } /* end for */
 
     /* Initialize the filenames */
@@ -2790,9 +2790,9 @@ test_copy_dataset_chunked_sparse(hid_t fcpl_src, hid_t fcpl_dst, hid_t src_fapl,
 
     /* set initial data values */
     for(i = 0; i < DIM_SIZE_1; i++) {
-        buf1d[i] = (float)(i / 10.0);
+        buf1d[i] = (float)(i / 10.0F);
         for(j = 0; j < DIM_SIZE_2; j++)
-            buf2d[i][j] = (float)(i + (j / 100.0));
+            buf2d[i][j] = (float)(i + (j / 100.0F));
     } /* end for */
 
     /* Initialize the filenames */
@@ -2985,7 +2985,7 @@ test_copy_dataset_compressed(hid_t fcpl_src, hid_t fcpl_dst, hid_t src_fapl, hid
     /* set initial data values */
     for (i=0; i<DIM_SIZE_1; i++)
         for (j=0; j<DIM_SIZE_2; j++)
-            buf[i][j] = (float)(100.0);         /* Something easy to compress */
+            buf[i][j] = 100.0F;         /* Something easy to compress */
 
     /* Initialize the filenames */
     h5_fixname(FILENAME[0], src_fapl, src_filename, sizeof src_filename);
@@ -3114,7 +3114,7 @@ test_copy_dataset_compact(hid_t fcpl_src, hid_t fcpl_dst, hid_t src_fapl, hid_t
     /* set initial data values */
     for (i=0; i<DIM_SIZE_1; i++)
         for (j=0; j<DIM_SIZE_2; j++)
-            buf[i][j] = (float)(i+j/100.0);
+            buf[i][j] = (float)(i+j/100.0F);
 
     /* Initialize the filenames */
     h5_fixname(FILENAME[0], src_fapl, src_filename, sizeof src_filename);
@@ -7591,7 +7591,7 @@ test_copy_dataset_contig_cmpd_vl(hid_t fcpl_src, hid_t fcpl_dst, hid_t src_fapl,
         buf[i].b.p = (int *)HDmalloc(buf[i].b.len * sizeof(int));
         for(j = 0; j < buf[i].b.len; j++)
             ((int *)buf[i].b.p)[j] = (int)(i * 10 + j);
-        buf[i].c = 1. / (i + 1.);
+        buf[i].c = 1.0F / (i + 1.0F);
     } /* end for */
 
     /* Initialize the filenames */
@@ -7730,7 +7730,7 @@ test_copy_dataset_chunked_cmpd_vl(hid_t fcpl_src, hid_t fcpl_dst, hid_t src_fapl
         buf[i].b.p = (int *)HDmalloc(buf[i].b.len * sizeof(int));
         for(j = 0; j < buf[i].b.len; j++)
             ((int *)buf[i].b.p)[j] = (int)(i * 10 + j);
-        buf[i].c = 1. / (i + 1.);
+        buf[i].c = 1.0F / (i + 1.0F);
     } /* end for */
 
     /* Initialize the filenames */
@@ -7875,7 +7875,7 @@ test_copy_dataset_compact_cmpd_vl(hid_t fcpl_src, hid_t fcpl_dst, hid_t src_fapl
         buf[i].b.p = (int *)HDmalloc(buf[i].b.len * sizeof(int));
         for(j = 0; j < buf[i].b.len; j++)
             ((int *)buf[i].b.p)[j] = (int)(i * 10 + j);
-        buf[i].c = 1. / (i + 1.);
+        buf[i].c = 1.0F / (i + 1.0F);
     } /* end for */
 
     /* Initialize the filenames */
diff --git a/test/set_extent.c b/test/set_extent.c
index aaa6516..f6c3766 100644
--- a/test/set_extent.c
+++ b/test/set_extent.c
@@ -130,10 +130,10 @@ int main( void )
     if((fapl2 = H5Pcopy(fapl)) < 0) TEST_ERROR
 
     /* Set chunk cache so only part of the chunks can be cached on fapl */
-    if(H5Pset_cache(fapl, 0, (size_t)8, 256 * sizeof(int), 0.75) < 0) TEST_ERROR
+    if(H5Pset_cache(fapl, 0, (size_t)8, 256 * sizeof(int), 0.75F) < 0) TEST_ERROR
 
     /* Disable chunk caching on fapl2 */
-    if(H5Pset_cache(fapl2, 0, (size_t)0, (size_t)0, 0.) < 0) TEST_ERROR
+    if(H5Pset_cache(fapl2, 0, (size_t)0, (size_t)0, 0.0F) < 0) TEST_ERROR
 
     /* Set the "use the latest version of the format" bounds for creating objects in the file */
     if(H5Pset_libver_bounds(fapl2, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0) TEST_ERROR
diff --git a/test/tarray.c b/test/tarray.c
index 1a53336..e3d7c37 100644
--- a/test/tarray.c
+++ b/test/tarray.c
@@ -541,7 +541,7 @@ test_array_compound_atomic(void)
     for(i = 0; i < SPACE1_DIM1; i++)
         for(j = 0; j < ARRAY1_DIM1; j++) {
             wdata[i][j].i = i * 10 + j;
-            wdata[i][j].f = (float)(i * 2.5 + j);
+            wdata[i][j].f = (float)(i * 2.5F + j);
         } /* end for */
 
     /* Create file */
@@ -745,7 +745,7 @@ test_array_compound_array(void)
         for(j=0; j<ARRAY1_DIM1; j++) {
             wdata[i][j].i=i*10+j;
             for(k=0; k<ARRAY1_DIM1; k++)
-                wdata[i][j].f[k]=(float)(i*10+j*2.5+k);
+                wdata[i][j].f[k]=(float)(i * 10.0F + j * 2.5F + k);
         } /* end for */
 
     /* Create file */
@@ -1534,8 +1534,8 @@ test_array_bkg(void)
 		for (j = 0; j < ALEN; j++)
 		  {
 			cf[i].a[j] = 100*(i+1) + j;
-			cf[i].b[j] = (float)(100.*(i+1) + 0.01*j);
-			cf[i].c[j] = 100.*(i+1) + 0.02*j;
+			cf[i].b[j] = (float)(100.0F*(i+1) + 0.01F*j);
+			cf[i].c[j] = (double)(100.0F*(i+1) + 0.02F*j);
 		  }
 	  }
 
@@ -1674,7 +1674,7 @@ test_array_bkg(void)
     /* -------------------------------- */
     for (i=0; i< LENGTH; i++)
         for (j = 0; j < ALEN; j++)
-            cf[i].b[j]=fld[i].b[j] = (float)1.313;
+            cf[i].b[j]=fld[i].b[j] = 1.313F;
 
     status = H5Dwrite (dataset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, fld);
     CHECK(status, FAIL, "H5Dwrite");
diff --git a/test/tattr.c b/test/tattr.c
index 2885124..57d19ff 100644
--- a/test/tattr.c
+++ b/test/tattr.c
@@ -97,7 +97,7 @@ int attr_data2[ATTR2_DIM1][ATTR2_DIM2]={{7614,-416},{197814,-3}}; /* Test data f
 #define ATTR3_DIM1	2
 #define ATTR3_DIM2	2
 #define ATTR3_DIM3	2
-double attr_data3[ATTR3_DIM1][ATTR3_DIM2][ATTR3_DIM3]={{{2.3,-26.1},{0.123,-10.0}},{{973.23,-0.91827},{2.0,23.0}}}; /* Test data for 3rd attribute */
+double attr_data3[ATTR3_DIM1][ATTR3_DIM2][ATTR3_DIM3]={{{2.3F,-26.1F}, {0.123F,-10.0F}},{{973.23F,-0.91827F},{2.0F,23.0F}}}; /* Test data for 3rd attribute */
 
 #define ATTR4_NAME  "Attr4"
 #define ATTR4_RANK	2
@@ -113,12 +113,12 @@ struct attr4_struct {
     int i;
     double d;
     char c;
- } attr_data4[ATTR4_DIM1][ATTR4_DIM2]={{{3,-26.1,'d'},{-100000, 0.123,'3'}},
-    {{-23,981724.2,'Q'},{0,2.0,'\n'}}}; /* Test data for 4th attribute */
+ } attr_data4[ATTR4_DIM1][ATTR4_DIM2]={{{3,-26.1F,'d'},{-100000, 0.123F,'3'}},
+    {{-23,981724.2F,'Q'},{0,2.0F,'\n'}}}; /* Test data for 4th attribute */
 
 #define ATTR5_NAME  "Attr5"
 #define ATTR5_RANK	0
-float attr_data5=(float)-5.123;        /* Test data for 5th attribute */
+float attr_data5=-5.123F;        /* Test data for 5th attribute */
 
 #define ATTR6_RANK	3
 #define ATTR6_DIM1	100
@@ -500,7 +500,7 @@ test_attr_flush(hid_t fapl)
         att,            /* Attribute ID */
         spc,            /* Dataspace ID */
         set;            /* Dataset ID */
-    double wdata=3.14159;       /* Data to write */
+    double wdata=3.14159F;       /* Data to write */
     double rdata;       /* Data read in */
     herr_t ret;		/* Generic return value		*/
 
@@ -522,8 +522,8 @@ test_attr_flush(hid_t fapl)
     ret=H5Aread(att, H5T_NATIVE_DOUBLE, &rdata);
     CHECK(ret, FAIL, "H5Awrite");
 
-    if(!DBL_ABS_EQUAL(rdata,0.0))
-        TestErrPrintf("attribute value wrong: rdata=%f, should be %f\n",rdata,0.0);
+    if(!DBL_ABS_EQUAL(rdata,0.0F))
+        TestErrPrintf("attribute value wrong: rdata=%f, should be %f\n",rdata,0.0F);
 
     ret=H5Fflush(fil, H5F_SCOPE_GLOBAL);
     CHECK(ret, FAIL, "H5Fflush");
@@ -531,8 +531,8 @@ test_attr_flush(hid_t fapl)
     ret=H5Aread(att, H5T_NATIVE_DOUBLE, &rdata);
     CHECK(ret, FAIL, "H5Awrite");
 
-    if(!DBL_ABS_EQUAL(rdata,0.0))
-        TestErrPrintf("attribute value wrong: rdata=%f, should be %f\n",rdata,0.0);
+    if(!DBL_ABS_EQUAL(rdata,0.0F))
+        TestErrPrintf("attribute value wrong: rdata=%f, should be %f\n",rdata,0.0F);
 
     ret=H5Awrite(att, H5T_NATIVE_DOUBLE, &wdata);
     CHECK(ret, FAIL, "H5Awrite");
@@ -985,7 +985,7 @@ test_attr_scalar_read(hid_t fapl)
     hid_t	sid;	        /* Dataspace ID			*/
     hid_t	attr;	        /* Attribute ID			*/
     H5S_class_t stype;          /* Dataspace class              */
-    float       rdata = 0.0;    /* Buffer for reading 1st attribute */
+    float       rdata = 0.0F;    /* Buffer for reading 1st attribute */
     H5O_info_t  oinfo;          /* Object info                  */
     herr_t	ret;		/* Generic return value		*/
 
diff --git a/test/tfile.c b/test/tfile.c
index 5de035a..52c8fd9 100644
--- a/test/tfile.c
+++ b/test/tfile.c
@@ -2362,7 +2362,7 @@ test_rw_noupdate(void)
     diff = HDdifftime(sb2.st_mtime, sb1.st_mtime);
 
     /* Check That Timestamps Are Equal */
-    if(diff > 0.0) {
+    if(diff > 0.0F) {
         /* Output message about test being performed */
         MESSAGE(1, ("Testing to verify that nothing is written if nothing is changed: This test is skipped on this system because the modification time from stat is the same as the last access time (We know OpenVMS behaves in this way).\n"));
     } /* end if */
@@ -2395,7 +2395,7 @@ test_rw_noupdate(void)
 
         /* Ensure That Timestamps Are Equal */
         diff = HDdifftime(sb2.st_mtime, sb1.st_mtime);
-        ret = (diff > 0.0);
+        ret = (diff > 0.0F);
         VERIFY(ret, 0, "Timestamp");
     } /* end else */
 } /* end test_rw_noupdate() */
diff --git a/test/tgenprop.c b/test/tgenprop.c
index 004e346..d147099 100644
--- a/test/tgenprop.c
+++ b/test/tgenprop.c
@@ -47,7 +47,7 @@ int         prop1_def=10;   /* Property 1 default value */
 #define PROP1_DEF_VALUE (&prop1_def)
 
 #define PROP2_NAME     "Property 2"
-float         prop2_def=(float)3.14;   /* Property 2 default value */
+float         prop2_def=3.14F;   /* Property 2 default value */
 #define PROP2_SIZE      sizeof(prop2_def)
 #define PROP2_DEF_VALUE (&prop2_def)
 
@@ -57,7 +57,7 @@ char          prop3_def[10]="Ten chars";   /* Property 3 default value */
 #define PROP3_DEF_VALUE (&prop3_def)
 
 #define PROP4_NAME     "Property 4"
-double          prop4_def=1.41;   /* Property 4 default value */
+double          prop4_def=1.41F;   /* Property 4 default value */
 #define PROP4_SIZE      sizeof(prop4_def)
 #define PROP4_DEF_VALUE (&prop4_def)
 
diff --git a/test/th5s.c b/test/th5s.c
index d3a651c..94268a7 100644
--- a/test/th5s.c
+++ b/test/th5s.c
@@ -79,7 +79,7 @@ struct space4_struct {
     unsigned u;
     float f;
     char c2;
- } space4_data={'v',987123,(float)-3.14,'g'}; /* Test data for 4th dataspace */
+ } space4_data={'v',987123,-3.14F,'g'}; /* Test data for 4th dataspace */
 
 /****************************************************************
 **
@@ -1647,7 +1647,7 @@ test_h5s_chunk(void)
     /* Initialize float array */
     for(i = 0; i < 50000; i++)
         for(j = 0; j < 3; j++)
-            chunk_data_flt[i][j] = (float)((i + 1) * 2.5 - j * 100.3);
+            chunk_data_flt[i][j] = (float)((i + 1) * 2.5F - j * 100.3F);
 
     status = H5Dwrite(dsetID, H5T_NATIVE_FLOAT, H5S_ALL, H5S_ALL, H5P_DEFAULT, chunk_data_flt);
     CHECK(status, FAIL, "H5Dwrite");
@@ -1683,7 +1683,7 @@ test_h5s_chunk(void)
     for(i=0; i<50000; i++) {
         for(j=0; j<3; j++) {
             /* Check if the two values are within 0.001% range. */
-            if(!DBL_REL_EQUAL(chunk_data_dbl[i][j], chunk_data_flt[i][j], 0.00001))
+            if(!DBL_REL_EQUAL(chunk_data_dbl[i][j], chunk_data_flt[i][j], 0.00001F))
                 TestErrPrintf("%u: chunk_data_dbl[%d][%d]=%e, chunk_data_flt[%d][%d]=%e\n", (unsigned)__LINE__, i, j, chunk_data_dbl[i][j], i, j, chunk_data_flt[i][j]);
         } /* end for */
     } /* end for */
diff --git a/test/tmisc.c b/test/tmisc.c
index cac6b04..cffb3df 100644
--- a/test/tmisc.c
+++ b/test/tmisc.c
@@ -2427,17 +2427,17 @@ test_misc13(void)
 static void
 test_misc14(void)
 {
-    hid_t file_id;              /* File ID */
-    hid_t fapl;                 /* File access property list ID */
-    hid_t DataSpace;            /* Dataspace ID */
-    hid_t Dataset1;             /* Dataset ID #1 */
-    hid_t Dataset2;             /* Dataset ID #2 */
-    hid_t Dataset3;             /* Dataset ID #3 */
-    double data1 = 5.0;         /* Data to write for dataset #1 */
-    double data2 = 10.0;        /* Data to write for dataset #2 */
-    double data3 = 15.0;        /* Data to write for dataset #3 */
-    double rdata;               /* Data read in */
-    herr_t ret;                 /* Generic return value */
+    hid_t file_id;                  /* File ID */
+    hid_t fapl;                     /* File access property list ID */
+    hid_t DataSpace;                /* Dataspace ID */
+    hid_t Dataset1;                 /* Dataset ID #1 */
+    hid_t Dataset2;                 /* Dataset ID #2 */
+    hid_t Dataset3;                 /* Dataset ID #3 */
+    double data1 = 5.0F;            /* Data to write for dataset #1 */
+    double data2 = 10.0F;           /* Data to write for dataset #2 */
+    double data3 = 15.0F;           /* Data to write for dataset #3 */
+    double rdata;                   /* Data read in */
+    herr_t ret;                     /* Generic return value */
 
     /* Test creating two datasets and deleting the second */
 
@@ -4949,7 +4949,7 @@ test_misc28(void)
      * bytes). */
     fapl = H5Pcreate(H5P_FILE_ACCESS);
     CHECK(fapl, FAIL, "H5Pcreate");
-    ret = H5Pset_cache(fapl, MISC28_NSLOTS, MISC28_NSLOTS, MISC28_SIZE, 0.75);
+    ret = H5Pset_cache(fapl, MISC28_NSLOTS, MISC28_NSLOTS, MISC28_SIZE, 0.75F);
     CHECK(ret, FAIL, "H5Pset_cache");
 
     /* Create the dcpl and set the chunk size */
diff --git a/test/tsohm.c b/test/tsohm.c
index 8ebfd52..9da655e 100644
--- a/test/tsohm.c
+++ b/test/tsohm.c
@@ -57,7 +57,7 @@ const unsigned test_minsizes[H5O_SHMESG_MAX_NINDEXES] = {0, 2, 40, 100, 3, 1000}
 #define NAME_BUF_SIZE 512
 
 /* How much overhead counts as "not much" when converting B-trees, etc. */
-#define OVERHEAD_ALLOWED 1.15
+#define OVERHEAD_ALLOWED 1.15F
 
 #define NUM_DATASETS 10
 #define NUM_ATTRIBUTES 100
@@ -600,7 +600,7 @@ size1_helper(hid_t file, const char* filename, hid_t fapl_id, int test_file_clos
     wdata.i6 = 66;
     wdata.i7 = 77;
     wdata.i8 = 88;
-    wdata.f1 = 0.0;
+    wdata.f1 = 0.0F;
 
     /* Intialize rdata */
     HDmemset(&rdata, 0, sizeof(rdata));
diff --git a/test/tunicode.c b/test/tunicode.c
index 7dc3391..82dc429 100644
--- a/test/tunicode.c
+++ b/test/tunicode.c
@@ -39,8 +39,8 @@
 
 #define RANK 1
 #define COMP_INT_VAL 7
-#define COMP_FLOAT_VAL -42.0
-#define COMP_DOUBLE_VAL 42.0
+#define COMP_FLOAT_VAL -42.0F
+#define COMP_DOUBLE_VAL 42.0F
 
 /* Test function prototypes */
 void test_fl_string(hid_t fid, const char *string);
diff --git a/test/tvltypes.c b/test/tvltypes.c
index 516974e..2928e57 100644
--- a/test/tvltypes.c
+++ b/test/tvltypes.c
@@ -731,7 +731,7 @@ test_vltypes_vlen_compound(void)
         wdata[i].len=i+1;
         for(j=0; j<(i+1); j++) {
             ((s1 *)wdata[i].p)[j].i=i*10+j;
-            ((s1 *)wdata[i].p)[j].f=(float)((i*20+j)/3.0);
+            ((s1 *)wdata[i].p)[j].f=(float)((i*20+j)/3.0F);
           } /* end for */
     } /* end for */
 
@@ -877,7 +877,7 @@ rewrite_vltypes_vlen_compound(void)
         wdata[i].len = i + increment;
         for(j = 0; j < (i + increment); j++) {
             ((s1 *)wdata[i].p)[j].i = i * 40 + j;
-            ((s1 *)wdata[i].p)[j].f = (float)((i * 60 + j) / 3.0);
+            ((s1 *)wdata[i].p)[j].f = (float)((i * 60 + j) / 3.0F);
           } /* end for */
     } /* end for */
 
@@ -1018,7 +1018,7 @@ test_vltypes_compound_vlen_vlen(void)
     /* Allocate and initialize VL data to write */
     for(i=0; i<SPACE3_DIM1; i++) {
         wdata[i].i=i*10;
-        wdata[i].f=(float)((i*20)/3.0);
+        wdata[i].f=(float)((i*20)/3.0F);
         wdata[i].v.p=HDmalloc((i+L1_INCM)*sizeof(hvl_t));
         wdata[i].v.len=i+L1_INCM;
         for(t1=(wdata[i].v).p,j=0; j<(i+L1_INCM); j++, t1++) {
@@ -1479,7 +1479,7 @@ test_vltypes_compound_vlen_atomic(void)
     /* Allocate and initialize VL data to write */
     for(i=0; i<SPACE1_DIM1; i++) {
         wdata[i].i=i*10;
-        wdata[i].f=(float)((i*20)/3.0);
+        wdata[i].f=(float)((i*20)/3.0F);
         wdata[i].v.p=HDmalloc((i+1)*sizeof(unsigned int));
         wdata[i].v.len=i+1;
         for(j=0; j<(i+1); j++)
@@ -1595,7 +1595,7 @@ test_vltypes_compound_vlen_atomic(void)
 
     /* Check data read in */
     for(i = 0; i < SPACE1_DIM1; i++)
-        if(rdata[i].i != 0 || !FLT_ABS_EQUAL(rdata[i].f, 0.0) || rdata[i].v.len != 0 || rdata[i].v.p != NULL)
+        if(rdata[i].i != 0 || !FLT_ABS_EQUAL(rdata[i].f, 0.0F) || rdata[i].v.len != 0 || rdata[i].v.p != NULL)
             TestErrPrintf("VL doesn't match!, rdata[%d].i=%d, rdata[%d].f=%f, rdata[%d].v.len=%u, rdata[%d].v.p=%p\n",(int)i,rdata[i].i,(int)i,rdata[i].f,(int)i,(unsigned)rdata[i].v.len,(int)i,rdata[i].v.p);
 
     /* Write dataset to disk */
@@ -1697,7 +1697,7 @@ rewrite_vltypes_compound_vlen_atomic(void)
     /* Allocate and initialize VL data to write */
     for(i = 0; i < SPACE1_DIM1; i++) {
         wdata[i].i = i * 40;
-        wdata[i].f = (float)((i * 50) / 3.0);
+        wdata[i].f = (float)((i * 50) / 3.0F);
         wdata[i].v.p = HDmalloc((i + increment) * sizeof(unsigned int));
         wdata[i].v.len = i + increment;
         for(j = 0; j < (i + increment); j++)
@@ -2430,8 +2430,8 @@ test_vltypes_fill_value(void)
     hsize_t small_dims[] = {SPACE4_DIM_SMALL};
     hsize_t large_dims[] = {SPACE4_DIM_LARGE};
     size_t dset_elmts;                  /* Number of elements in a particular dataset */
-    const dtype1_struct fill1 = {1, 2, "foobar", "", NULL, "\0", "dead", 3, 4.0, 100.0, 1.0, "liquid", "meter"};
-    const dtype1_struct wdata = {3, 4, "", NULL, "\0", "foo", "two", 6, 8.0, 200.0, 2.0, "solid", "yard"};
+    const dtype1_struct fill1 = {1, 2, "foobar", "", NULL, "\0", "dead", 3, 4.0F, 100.0F, 1.0F, "liquid", "meter"};
+    const dtype1_struct wdata = {3, 4, "", NULL, "\0", "foo", "two", 6, 8.0F, 200.0F, 2.0F, "solid", "yard"};
     dtype1_struct *rbuf = NULL;         /* Buffer for reading data */
     size_t mem_used = 0;                /* Memory used during allocation */
     H5D_layout_t layout;                /* Dataset storage layout */