Updated configure & CMake compiler flags for GCC 8.x, along with corresponding

changes to warnhist script (and some extra improvements for condensing C++
and Java warnings), and fixed a bunch of warnings.

14 files changed, 217 insertions, 199 deletions

diff --git a/test/cmpd_dset.c b/test/cmpd_dset.c
index 1944ce1..22950e9 100644
--- a/test/cmpd_dset.c
+++ b/test/cmpd_dset.c
@@ -910,7 +910,7 @@ initialize_stype1(unsigned char *buf, size_t num)
     stype1 *s_ptr;
 
     for(i = 0; i < (int)num; i++) {
-	s_ptr = (stype1 *)buf + i;
+	s_ptr = (stype1 *)((void *)buf) + i;
 	s_ptr->a    = i * 8 + 0;
 	s_ptr->b    = i * 8 + 1;
         for(j = 0; j < 8; j++)
@@ -953,7 +953,7 @@ initialize_stype2(unsigned char *buf, size_t num)
     stype2 *s_ptr;
 
     for(i = 0; i < num; i++) {
-	s_ptr = (stype2 *)buf + i;
+	s_ptr = (stype2 *)((void *)buf) + i;
 	s_ptr->a    = (int)(i * 8 + 0);
 	s_ptr->b    = (int)(i * 8 + 1);
         for(j = 0; j < 8; j++)
@@ -1000,7 +1000,7 @@ initialize_stype3(unsigned char *buf, size_t num)
     stype3 *s_ptr;
 
     for(i = 0; i < (int)num; i++) {
-	s_ptr = (stype3 *)buf + i;
+	s_ptr = (stype3 *)((void *)buf) + i;
 	s_ptr->a    = i * 8 + 0;
 	s_ptr->b    = i * 8 + 1;
         for(j = 0; j < 8; j++)
@@ -1031,7 +1031,7 @@ initialize_stype4(unsigned char *buf, size_t num)
     stype4 *s_ptr;
 
     for(i = 0; i < num; i++) {
-	s_ptr = (stype4 *)buf + i;
+	s_ptr = (stype4 *)((void *)buf) + i;
 	s_ptr->a    = (int)(i * 8 + 0);
 	s_ptr->b    = (int)(i * 8 + 1);
         for(j = 0; j < 8; j++)
@@ -2219,7 +2219,7 @@ main (int argc, char *argv[])
 	    fprintf(stderr, "usage: %s [--noopt]\n", argv[0]);
 	    exit(EXIT_FAILURE);
 	}
-	H5Tunregister(H5T_PERS_DONTCARE, NULL, (hid_t)-1, (hid_t)-1, H5T__conv_struct_opt);
+	H5Tunregister(H5T_PERS_DONTCARE, NULL, (hid_t)-1, (hid_t)-1, (H5T_conv_t)((void (*) (void))H5T__conv_struct_opt));
     }
 
     /* Create the file */
diff --git a/test/dt_arith.c b/test/dt_arith.c
index 2729ba1..645608b 100644
--- a/test/dt_arith.c
+++ b/test/dt_arith.c
@@ -627,7 +627,7 @@ test_hard_query(void)
 
     /* Unregister the hard conversion from int to float.  Verify the conversion
      * is a soft conversion. */
-    H5Tunregister(H5T_PERS_HARD, NULL, H5T_NATIVE_INT, H5T_NATIVE_FLOAT, H5T__conv_int_float);
+    H5Tunregister(H5T_PERS_HARD, NULL, H5T_NATIVE_INT, H5T_NATIVE_FLOAT, (H5T_conv_t)((void (*) (void))H5T__conv_int_float));
     if(H5Tcompiler_conv(H5T_NATIVE_INT, H5T_NATIVE_FLOAT) != FALSE) {
         H5_FAILED();
         printf("Can't query conversion function\n");
@@ -636,7 +636,7 @@ test_hard_query(void)
 
     /* Register the hard conversion from int to float.  Verify the conversion
      * is a hard conversion. */
-    H5Tregister(H5T_PERS_HARD, "int_flt", H5T_NATIVE_INT, H5T_NATIVE_FLOAT, H5T__conv_int_float);
+    H5Tregister(H5T_PERS_HARD, "int_flt", H5T_NATIVE_INT, H5T_NATIVE_FLOAT, (H5T_conv_t)((void (*) (void))H5T__conv_int_float));
     if(H5Tcompiler_conv(H5T_NATIVE_INT, H5T_NATIVE_FLOAT) != TRUE) {
         H5_FAILED();
         printf("Can't query conversion function\n");
@@ -2578,34 +2578,34 @@ test_conv_int_1(const char *name, hid_t src, hid_t dst)
         printf("%*s", (int)(3*MAX(0, (ssize_t)src_size-(ssize_t)dst_size)), "");
         switch (dst_type) {
             case INT_SCHAR:
-                printf(" %29d\n", (int)*((signed char*)hw));
+                printf(" %29d\n", (int)*((signed char*)((void *)hw)));
                 break;
             case INT_UCHAR:
-                printf(" %29u\n", (unsigned)*((unsigned char*)hw));
+                printf(" %29u\n", (unsigned)*((unsigned char*)((void *)hw)));
                 break;
             case INT_SHORT:
-                printf(" %29hd\n", *((short*)hw));
+                printf(" %29hd\n", *((short*)((void *)hw)));
                 break;
             case INT_USHORT:
-                printf(" %29hu\n", *((unsigned short*)hw));
+                printf(" %29hu\n", *((unsigned short*)((void *)hw)));
                 break;
             case INT_INT:
-                printf(" %29d\n", *((int*)hw));
+                printf(" %29d\n", *((int*)((void *)hw)));
                 break;
             case INT_UINT:
-                printf(" %29u\n", *((unsigned*)hw));
+                printf(" %29u\n", *((unsigned*)((void *)hw)));
                 break;
             case INT_LONG:
-                printf(" %29ld\n", *((long*)hw));
+                printf(" %29ld\n", *((long*)((void *)hw)));
                 break;
             case INT_ULONG:
-                printf(" %29lu\n", *((unsigned long*)hw));
+                printf(" %29lu\n", *((unsigned long*)((void *)hw)));
                 break;
             case INT_LLONG:
-                HDfprintf(stdout," %29"H5_PRINTF_LL_WIDTH"d\n", *((long long*)hw));
+                HDfprintf(stdout," %29"H5_PRINTF_LL_WIDTH"d\n", *((long long*)((void *)hw)));
                 break;
             case INT_ULLONG:
-                HDfprintf(stdout," %29"H5_PRINTF_LL_WIDTH"u\n", *((unsigned long long*)hw));
+                HDfprintf(stdout," %29"H5_PRINTF_LL_WIDTH"u\n", *((unsigned long long*)((void *)hw)));
                 break;
             case FLT_FLOAT:
             case FLT_DOUBLE:
@@ -4485,44 +4485,44 @@ test_conv_int_fp(const char *name, int run_test, hid_t src, hid_t dst)
         printf("%*s", (int)(3*MAX(0, (ssize_t)src_size-(ssize_t)dst_size)), "");
         switch (dst_type) {
             case INT_SCHAR:
-                printf(" %29d\n", (int)*((signed char*)hw));
+                printf(" %29d\n", (int)*((signed char*)((void *)hw)));
                 break;
             case INT_UCHAR:
-                printf(" %29u\n", (unsigned)*((unsigned char*)hw));
+                printf(" %29u\n", (unsigned)*((unsigned char*)((void *)hw)));
                 break;
             case INT_SHORT:
-                printf(" %29hd\n", *((short*)hw));
+                printf(" %29hd\n", *((short*)((void *)hw)));
                 break;
             case INT_USHORT:
-                printf(" %29hu\n", *((unsigned short*)hw));
+                printf(" %29hu\n", *((unsigned short*)((void *)hw)));
                 break;
             case INT_INT:
-                printf(" %29d\n", *((int*)hw));
+                printf(" %29d\n", *((int*)((void *)hw)));
                 break;
             case INT_UINT:
-                printf(" %29u\n", *((unsigned int*)hw));
+                printf(" %29u\n", *((unsigned int*)((void *)hw)));
                 break;
             case INT_LONG:
-                printf(" %29ld\n", *((long*)hw));
+                printf(" %29ld\n", *((long*)((void *)hw)));
                 break;
             case INT_ULONG:
-                printf(" %29lu\n", *((unsigned long*)hw));
+                printf(" %29lu\n", *((unsigned long*)((void *)hw)));
                 break;
             case INT_LLONG:
-                HDfprintf(stdout, " %29"H5_PRINTF_LL_WIDTH"d\n", *((long long*)hw));
+                HDfprintf(stdout, " %29"H5_PRINTF_LL_WIDTH"d\n", *((long long*)((void *)hw)));
                 break;
             case INT_ULLONG:
-                HDfprintf(stdout, " %29"H5_PRINTF_LL_WIDTH"u\n", *((unsigned long long*)hw));
+                HDfprintf(stdout, " %29"H5_PRINTF_LL_WIDTH"u\n", *((unsigned long long*)((void *)hw)));
                 break;
             case FLT_FLOAT:
-                printf(" %29f\n", (double)*((float*)hw));
+                printf(" %29f\n", (double)*((float*)((void *)hw)));
                 break;
             case FLT_DOUBLE:
-                printf(" %29f\n", *((double*)hw));
+                printf(" %29f\n", *((double*)((void *)hw)));
                 break;
 #if H5_SIZEOF_LONG_DOUBLE !=0
             case FLT_LDOUBLE:
-                printf(" %29Lf\n", *((long double*)hw));
+                printf(" %29Lf\n", *((long double*)((void *)hw)));
                 break;
 #endif
             case OTHER:
diff --git a/test/dtypes.c b/test/dtypes.c
index 2056245..39fad9f 100644
--- a/test/dtypes.c
+++ b/test/dtypes.c
@@ -716,7 +716,7 @@ test_compound_2(void)
     bkg = (unsigned char*)HDmalloc(nelmts * sizeof(struct dt));
     orig = (unsigned char*)HDmalloc(nelmts * sizeof(struct st));
     for (i=0; i<(int)nelmts; i++) {
-	s_ptr = ((struct st*)orig) + i;
+	s_ptr = ((struct st*)((void *)orig)) + i;
 	s_ptr->a    = i*8+0;
 	s_ptr->b    = i*8+1;
 	s_ptr->c[0] = i*8+2;
@@ -754,8 +754,8 @@ test_compound_2(void)
 
     /* Compare results */
     for (i=0; i<(int)nelmts; i++) {
-	s_ptr = ((struct st*)orig) + i;
-	d_ptr = ((struct dt*)buf)  + i;
+	s_ptr = ((struct st*)((void *)orig)) + i;
+	d_ptr = ((struct dt*)((void *)buf))  + i;
 	if (s_ptr->a    != d_ptr->a    ||
 	    s_ptr->b    != d_ptr->b    ||
 	    s_ptr->c[0] != d_ptr->c[0] ||
@@ -847,7 +847,7 @@ test_compound_3(void)
     bkg = (unsigned char*)HDmalloc(nelmts * sizeof(struct dt));
     orig = (unsigned char*)HDmalloc(nelmts * sizeof(struct st));
     for (i=0; i<(int)nelmts; i++) {
-        s_ptr = ((struct st*)orig) + i;
+        s_ptr = ((struct st*)((void *)orig)) + i;
         s_ptr->a    = i*8+0;
         s_ptr->b    = i*8+1;
         s_ptr->c[0] = i*8+2;
@@ -884,8 +884,8 @@ test_compound_3(void)
 
     /* Compare results */
     for (i=0; i<(int)nelmts; i++) {
-	s_ptr = ((struct st*)orig) + i;
-	d_ptr = ((struct dt*)buf)  + i;
+	s_ptr = ((struct st*)((void *)orig)) + i;
+	d_ptr = ((struct dt*)((void *)buf))  + i;
 	if (s_ptr->a    != d_ptr->a    ||
 	    s_ptr->c[0] != d_ptr->c[0] ||
 	    s_ptr->c[1] != d_ptr->c[1] ||
@@ -978,7 +978,7 @@ test_compound_4(void)
     bkg = (unsigned char*)HDmalloc(nelmts * sizeof(struct dt));
     orig = (unsigned char*)HDmalloc(nelmts * sizeof(struct st));
     for (i=0; i<(int)nelmts; i++) {
-        s_ptr = ((struct st*)orig) + i;
+        s_ptr = ((struct st*)((void *)orig)) + i;
         s_ptr->a    = i*8+0;
         s_ptr->b    = (i*8+1) & 0x7fff;
         s_ptr->c[0] = i*8+2;
@@ -1017,8 +1017,8 @@ test_compound_4(void)
 
     /* Compare results */
     for (i=0; i<(int)nelmts; i++) {
-	s_ptr = ((struct st*)orig) + i;
-	d_ptr = ((struct dt*)buf)  + i;
+	s_ptr = ((struct st*)((void *)orig)) + i;
+	d_ptr = ((struct dt*)((void *)buf))  + i;
 	if (s_ptr->a    != d_ptr->a    ||
 	    s_ptr->b    != d_ptr->b    ||
 	    s_ptr->c[0] != d_ptr->c[0] ||
@@ -1215,7 +1215,7 @@ test_compound_6(void)
     bkg = (unsigned char*)HDmalloc(nelmts * sizeof(struct dt));
     orig = (unsigned char*)HDmalloc(nelmts * sizeof(struct st));
     for (i=0; i<(int)nelmts; i++) {
-        s_ptr = ((struct st*)orig) + i;
+        s_ptr = ((struct st*)((void *)orig)) + i;
         s_ptr->b    = (i*8+1) & 0x7fff;
         s_ptr->d    = (i*8+6) & 0x7fff;
     }
@@ -1244,8 +1244,8 @@ test_compound_6(void)
 
     /* Compare results */
     for (i=0; i<(int)nelmts; i++) {
-	s_ptr = ((struct st*)orig) + i;
-	d_ptr = ((struct dt*)buf)  + i;
+	s_ptr = ((struct st*)((void *)orig)) + i;
+	d_ptr = ((struct dt*)((void *)buf))  + i;
 	if (s_ptr->b    != d_ptr->b    ||
 	    s_ptr->d    != d_ptr->d) {
 	    H5_FAILED();
@@ -1694,14 +1694,20 @@ test_compound_8(void)
 static int
 test_compound_9(void)
 {
-    typedef struct cmpd_struct {
+    typedef struct cmpd_struct_w {
        int    i1;
        const char* str;
        int    i2;
-    } cmpd_struct;
+    } cmpd_struct_w;
 
-    cmpd_struct wdata = {11, "variable-length string", 22};
-    cmpd_struct rdata;
+    typedef struct cmpd_struct_r {
+       int    i1;
+       char* str;
+       int    i2;
+    } cmpd_struct_r;
+
+    cmpd_struct_w wdata = {11, "variable-length string", 22};
+    cmpd_struct_r rdata;
     hid_t       file;
     hid_t       cmpd_tid, str_id, dup_tid;
     hid_t       space_id;
@@ -1720,13 +1726,13 @@ test_compound_9(void)
     } /* end if */
 
     /* Create first compound datatype */
-    if((cmpd_tid = H5Tcreate( H5T_COMPOUND, sizeof(struct cmpd_struct))) < 0) {
+    if((cmpd_tid = H5Tcreate( H5T_COMPOUND, sizeof(struct cmpd_struct_w))) < 0) {
         H5_FAILED(); AT();
         printf("Can't create datatype!\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_tid,"i1",HOFFSET(struct cmpd_struct,i1),H5T_NATIVE_INT) < 0) {
+    if(H5Tinsert(cmpd_tid, "i1", HOFFSET(struct cmpd_struct_w, i1), H5T_NATIVE_INT) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'i1'\n");
         goto error;
@@ -1739,13 +1745,13 @@ test_compound_9(void)
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_tid, "vl_string", HOFFSET(cmpd_struct, str), str_id) < 0) {
+    if(H5Tinsert(cmpd_tid, "vl_string", HOFFSET(cmpd_struct_w, str), str_id) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'i1'\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_tid, "i2", HOFFSET(struct cmpd_struct, i2), H5T_NATIVE_INT) < 0) {
+    if(H5Tinsert(cmpd_tid, "i2", HOFFSET(struct cmpd_struct_w, i2), H5T_NATIVE_INT) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'i2'\n");
         goto error;
@@ -2541,27 +2547,42 @@ error:
 static int
 test_compound_14(void)
 {
-    typedef struct cmpd_struct_1 {
+    typedef struct cmpd_struct_1_w {
        char         c1;
        char         c2;
        const char*  str;
-    } cmpd_struct_1;
+    } cmpd_struct_1_w;
 
-    typedef struct cmpd_struct_2 {
+    typedef struct cmpd_struct_1_r {
        char         c1;
        char         c2;
        char*        str;
+    } cmpd_struct_1_r;
+
+    typedef struct cmpd_struct_2_w {
+       char         c1;
+       char         c2;
+       const char*  str;
        long         l1;
        long         l2;
        long         l3;
        long         l4;
-    } cmpd_struct_2;
+    } cmpd_struct_2_w;
 
-    cmpd_struct_1 wdata1 = {'A', 'B', "variable-length string"};
+    typedef struct cmpd_struct_2_r {
+       char         c1;
+       char         c2;
+       char*        str;
+       long         l1;
+       long         l2;
+       long         l3;
+       long         l4;
+    } cmpd_struct_2_r;
 
-    cmpd_struct_1 rdata1;
-    cmpd_struct_2 wdata2 = {'C', 'D', "another vlen!", 1, 2, -1, 9001};
-    cmpd_struct_2 rdata2;
+    cmpd_struct_1_w wdata1 = {'A', 'B', "variable-length string"};
+    cmpd_struct_1_r rdata1;
+    cmpd_struct_2_w wdata2 = {'C', 'D', "another vlen!", 1, 2, -1, 9001};
+    cmpd_struct_2_r rdata2;
     hid_t       file;
     hid_t       cmpd_m1_tid, cmpd_f1_tid, cmpd_m2_tid, cmpd_f2_tid, str_id;
     hid_t       space_id;
@@ -2580,19 +2601,19 @@ test_compound_14(void)
     } /* end if */
 
     /* Create memory compound datatype 1 */
-    if((cmpd_m1_tid = H5Tcreate( H5T_COMPOUND, sizeof(struct cmpd_struct_1))) < 0) {
+    if((cmpd_m1_tid = H5Tcreate( H5T_COMPOUND, sizeof(struct cmpd_struct_1_w))) < 0) {
         H5_FAILED(); AT();
         printf("Can't create datatype!\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_m1_tid,"c1",HOFFSET(struct cmpd_struct_1,c1),H5T_NATIVE_CHAR) < 0) {
+    if(H5Tinsert(cmpd_m1_tid,"c1",HOFFSET(struct cmpd_struct_1_w, c1), H5T_NATIVE_CHAR) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'c1'\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_m1_tid,"c2",HOFFSET(struct cmpd_struct_1,c2),H5T_NATIVE_CHAR) < 0) {
+    if(H5Tinsert(cmpd_m1_tid,"c2",HOFFSET(struct cmpd_struct_1_w, c2), H5T_NATIVE_CHAR) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'c2'\n");
         goto error;
@@ -2605,7 +2626,7 @@ test_compound_14(void)
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_m1_tid, "vl_string", HOFFSET(cmpd_struct_1, str), str_id) < 0) {
+    if(H5Tinsert(cmpd_m1_tid, "vl_string", HOFFSET(cmpd_struct_1_w, str), str_id) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'vl_string'\n");
         goto error;
@@ -2637,49 +2658,49 @@ test_compound_14(void)
     } /* end if */
 
     /* Create memory compound datatype 2 */
-    if((cmpd_m2_tid = H5Tcreate( H5T_COMPOUND, sizeof(struct cmpd_struct_2))) < 0) {
+    if((cmpd_m2_tid = H5Tcreate( H5T_COMPOUND, sizeof(struct cmpd_struct_2_w))) < 0) {
         H5_FAILED(); AT();
         printf("Can't create datatype!\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_m2_tid,"c1",HOFFSET(struct cmpd_struct_2,c1),H5T_NATIVE_CHAR) < 0) {
+    if(H5Tinsert(cmpd_m2_tid,"c1",HOFFSET(struct cmpd_struct_2_w, c1), H5T_NATIVE_CHAR) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'c1'\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_m2_tid,"c2",HOFFSET(struct cmpd_struct_2,c2),H5T_NATIVE_CHAR) < 0) {
+    if(H5Tinsert(cmpd_m2_tid,"c2",HOFFSET(struct cmpd_struct_2_w, c2), H5T_NATIVE_CHAR) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'c2'\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_m2_tid, "vl_string", HOFFSET(cmpd_struct_2, str), str_id) < 0) {
+    if(H5Tinsert(cmpd_m2_tid, "vl_string", HOFFSET(cmpd_struct_2_w, str), str_id) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'vl_string'\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_m2_tid,"l1",HOFFSET(struct cmpd_struct_2,l1),H5T_NATIVE_LONG) < 0) {
+    if(H5Tinsert(cmpd_m2_tid,"l1",HOFFSET(struct cmpd_struct_2_w, l1), H5T_NATIVE_LONG) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'l1'\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_m2_tid,"l2",HOFFSET(struct cmpd_struct_2,l2),H5T_NATIVE_LONG) < 0) {
+    if(H5Tinsert(cmpd_m2_tid,"l2",HOFFSET(struct cmpd_struct_2_w, l2), H5T_NATIVE_LONG) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'l2'\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_m2_tid,"l3",HOFFSET(struct cmpd_struct_2,l3),H5T_NATIVE_LONG) < 0) {
+    if(H5Tinsert(cmpd_m2_tid,"l3",HOFFSET(struct cmpd_struct_2_w, l3), H5T_NATIVE_LONG) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'l3'\n");
         goto error;
     } /* end if */
 
-    if(H5Tinsert(cmpd_m2_tid,"l4",HOFFSET(struct cmpd_struct_2,l4),H5T_NATIVE_LONG) < 0) {
+    if(H5Tinsert(cmpd_m2_tid,"l4",HOFFSET(struct cmpd_struct_2_w, l4), H5T_NATIVE_LONG) < 0) {
         H5_FAILED(); AT();
         printf("Can't insert field 'l4'\n");
         goto error;
diff --git a/test/links.c b/test/links.c
index 3166954..2658101 100644
--- a/test/links.c
+++ b/test/links.c
@@ -3569,27 +3569,27 @@ external_set_elink_fapl1(hid_t fapl, hbool_t new_format)
     memb_map[H5FD_MEM_GHEAP] = H5FD_MEM_GHEAP;
     memb_map[H5FD_MEM_LHEAP] = H5FD_MEM_LHEAP;
 
-    sprintf(sv[H5FD_MEM_SUPER], "%%s-%c.h5", 's');
+    HDsnprintf(sv[H5FD_MEM_SUPER], sizeof(sv[H5FD_MEM_SUPER]), "%%s-%c.h5", 's');
     memb_name[H5FD_MEM_SUPER] = sv[H5FD_MEM_SUPER];
     memb_addr[H5FD_MEM_SUPER] = 0;
 
-    sprintf(sv[H5FD_MEM_BTREE], "%%s-%c.h5", 'b');
+    HDsnprintf(sv[H5FD_MEM_BTREE], sizeof(sv[H5FD_MEM_BTREE]), "%%s-%c.h5", 'b');
     memb_name[H5FD_MEM_BTREE] = sv[H5FD_MEM_BTREE];
     memb_addr[H5FD_MEM_BTREE] = HADDR_MAX/6;
 
-    sprintf(sv[H5FD_MEM_DRAW], "%%s-%c.h5", 'r');
+    HDsnprintf(sv[H5FD_MEM_DRAW], sizeof(sv[H5FD_MEM_DRAW]), "%%s-%c.h5", 'r');
     memb_name[H5FD_MEM_DRAW] = sv[H5FD_MEM_DRAW];
     memb_addr[H5FD_MEM_DRAW] = HADDR_MAX/3;
 
-    sprintf(sv[H5FD_MEM_GHEAP], "%%s-%c.h5", 'g');
+    HDsnprintf(sv[H5FD_MEM_GHEAP], sizeof(sv[H5FD_MEM_GHEAP]), "%%s-%c.h5", 'g');
     memb_name[H5FD_MEM_GHEAP] = sv[H5FD_MEM_GHEAP];
     memb_addr[H5FD_MEM_GHEAP] = HADDR_MAX/2;
 
-    sprintf(sv[H5FD_MEM_LHEAP], "%%s-%c.h5", 'l');
+    HDsnprintf(sv[H5FD_MEM_LHEAP], sizeof(sv[H5FD_MEM_LHEAP]), "%%s-%c.h5", 'l');
     memb_name[H5FD_MEM_LHEAP] = sv[H5FD_MEM_LHEAP];
     memb_addr[H5FD_MEM_LHEAP] = (HADDR_MAX/3)*2;
 
-    sprintf(sv[H5FD_MEM_OHDR], "%%s-%c.h5", 'o');
+    HDsnprintf(sv[H5FD_MEM_OHDR], sizeof(sv[H5FD_MEM_OHDR]), "%%s-%c.h5", 'o');
     memb_name[H5FD_MEM_OHDR] = sv[H5FD_MEM_OHDR];
     memb_addr[H5FD_MEM_OHDR] = (HADDR_MAX/6)*5;
 
@@ -4628,7 +4628,7 @@ external_link_win3(hid_t fapl, hbool_t new_format)
 
     /* set up name for target link: "<drive-letter>:tmp/extlinks12" */
     drive = HDgetdrive();
-    sprintf(tmpname, "%c:%s", (drive+'A'-1), FILENAME[32]);
+    HDsnprintf(tmpname, sizeof(tmpname), "%c:%s", (drive+'A'-1), FILENAME[32]);
     h5_fixname(tmpname, fapl, filename2, sizeof filename2);
 
     /* set up name for target file: "tmp/extlinks12" */
@@ -4713,11 +4713,11 @@ external_link_win4(hid_t fapl, hbool_t new_format)
 
     /* set up name for main file: "<drive-letter>:tmp/extlinks0" */
     drive = HDgetdrive();
-    sprintf(tmpname, "%c:%s", (drive+'A'-1), FILENAME[13]);
+    HDsnprintf(tmpname, sizeof(tmpname), "%c:%s", (drive+'A'-1), FILENAME[13]);
     h5_fixname(tmpname, fapl, filename1, sizeof filename1);
 
     /* set up name for target link: "<drive-letter>:extlinks13" */
-    sprintf(tmpname, "%c:%s", (drive+'A'-1), FILENAME[33]);
+    HDsnprintf(tmpname, sizeof(tmpname), "%c:%s", (drive+'A'-1), FILENAME[33]);
     h5_fixname(tmpname, fapl, filename2, sizeof filename2);
 
     /* set up name for target file: "tmp/extlinks13" */
@@ -4813,7 +4813,7 @@ external_link_win5(hid_t fapl, hbool_t new_format)
     h5_fixname(tmpname, fapl, filename1, sizeof filename1);
 
     /* set up name for target link: "<drive-letter+1>:tmp/extlinks14" */
-    sprintf(tmpname, "%c:%s", ((drive+1)+'A'-1), FILENAME[35]);
+    HDsnprintf(tmpname, sizeof(tmpname), "%c:%s", ((drive+1)+'A'-1), FILENAME[35]);
     h5_fixname(tmpname, fapl, filename2, sizeof filename2);
 
     /* set up name for target file: "tmp/extlinks14" */
@@ -4906,7 +4906,7 @@ external_link_win6(hid_t fapl, hbool_t new_format)
     h5_fixname(FILENAME[12], fapl, filename1, sizeof filename1);
 
     /* set up name for target link: "<drive-letter+1>:tmp/extlinks15" */
-    sprintf(tmpname, "%c:%s", ((drive+1)+'A'-1), FILENAME[36]);
+    HDsnprintf(tmpname, sizeof(tmpname), "%c:%s", ((drive+1)+'A'-1), FILENAME[36]);
     h5_fixname(tmpname, fapl, filename2, sizeof filename2);
 
     /* set up name for target file: "tmp/extlinks15" */
@@ -5085,7 +5085,7 @@ external_link_win8(hid_t fapl, hbool_t new_format)
 
     /* set up name for target link: "<drive-letter>:\CWD\extlinks10" */
     drive = HDgetdrive();
-    sprintf(tmpname, "\\\\?\\%c:%s\\%s", (drive+'A'-1), &cwdpath[2], FILENAME[30]);
+    HDsnprintf(tmpname, sizeof(tmpname), "\\\\?\\%c:%s\\%s", (drive+'A'-1), &cwdpath[2], FILENAME[30]);
     h5_fixname(tmpname, fapl, filename2, sizeof filename2);
 
     /* set up name for target file: "extlinks10" */
@@ -5569,7 +5569,7 @@ external_link_unlink_dense(hid_t fapl, hbool_t new_format)
 
     /* Create enough objects in the root group to change it into a "dense" group */
     for(u = 0; u < max_compact; u++) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if((gid2 = H5Gcreate2(gid, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
         if(H5Gclose(gid2) < 0) TEST_ERROR
     } /* end for */
@@ -5612,7 +5612,7 @@ external_link_unlink_dense(hid_t fapl, hbool_t new_format)
 
     /* Remove enough objects in the root group to change it into a "compact" group */
     for(u = 0; u < ((max_compact - min_dense) + 1); u++) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if(H5Ldelete(gid, objname, H5P_DEFAULT) < 0) FAIL_STACK_ERROR
     } /* end for */
 
@@ -5897,7 +5897,7 @@ external_link_ride(hid_t fapl, hbool_t new_format)
 
     /* Create enough objects in the root group to change it into a "dense" group */
     for(u = 0; u < (max_compact + 1); u++) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if((gid2 = H5Gcreate2(gid, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
         if(H5Gclose(gid2) < 0) TEST_ERROR
     } /* end for */
@@ -5966,7 +5966,7 @@ external_link_ride(hid_t fapl, hbool_t new_format)
 
     /* Remove enough objects in the root group to change it into a "compact" group */
     for(u = 0; u < ((max_compact - min_dense) + 3); u++) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if(H5Ldelete(gid, objname, H5P_DEFAULT) < 0) FAIL_STACK_ERROR
     } /* end for */
 
@@ -10654,7 +10654,7 @@ corder_create_compact(hid_t fapl)
 
     /* Create several links, but keep group in compact form */
     for(u = 0; u < max_compact; u++) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
         if(H5Gclose(group_id2) < 0) TEST_ERROR
 
@@ -10693,7 +10693,7 @@ corder_create_compact(hid_t fapl)
         H5L_info_t linfo;           /* Link information */
 
         /* Retrieve information for link */
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if(H5Lget_info(group_id, objname, &linfo, H5P_DEFAULT) < 0) TEST_ERROR
 
         /* Verify creation order of link */
@@ -10774,7 +10774,7 @@ corder_create_dense(hid_t fapl)
 
     /* Create several links, up to limit of compact form */
     for(u = 0; u < max_compact; u++) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
         if(H5Gclose(group_id2) < 0) TEST_ERROR
 
@@ -10786,7 +10786,7 @@ corder_create_dense(hid_t fapl)
     } /* end for */
 
     /* Create another link, to push group into dense form */
-    sprintf(objname, "filler %u", max_compact);
+    HDsnprintf(objname, sizeof(objname), "filler %u", max_compact);
     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
     if(H5Gclose(group_id2) < 0) TEST_ERROR
 
@@ -10826,7 +10826,7 @@ corder_create_dense(hid_t fapl)
         H5L_info_t linfo;           /* Link information */
 
         /* Retrieve information for link */
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if(H5Lget_info(group_id, objname, &linfo, H5P_DEFAULT) < 0) TEST_ERROR
 
         /* Verify creation order of link */
@@ -10928,13 +10928,13 @@ corder_transition(hid_t fapl)
 
     /* Create several links, up to limit of compact form */
     for(u = 0; u < max_compact; u++) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
         if(H5Gclose(group_id2) < 0) TEST_ERROR
     } /* end for */
 
     /* Create another link, to push group into dense form */
-    sprintf(objname, "filler %u", max_compact);
+    HDsnprintf(objname, sizeof(objname), "filler %u", max_compact);
     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
     if(H5Gclose(group_id2) < 0) TEST_ERROR
 
@@ -10949,7 +10949,7 @@ corder_transition(hid_t fapl)
 
     /* Delete several links from group, until it resumes compact form */
     for(u = max_compact; u >= min_dense; u--) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if(H5Ldelete(group_id, objname, H5P_DEFAULT) < 0) TEST_ERROR
 
         /* Verify state of group */
@@ -10963,7 +10963,7 @@ corder_transition(hid_t fapl)
     } /* end for */
 
     /* Delete another link, to push group into compact form */
-    sprintf(objname, "filler %u", (min_dense - 1));
+    HDsnprintf(objname, sizeof(objname), "filler %u", (min_dense - 1));
     if(H5Ldelete(group_id, objname, H5P_DEFAULT) < 0) TEST_ERROR
 
     /* Verify state of group */
@@ -10974,7 +10974,7 @@ corder_transition(hid_t fapl)
 
     /* Re-add links to get back into dense form */
     for(u = (min_dense - 1); u < (max_compact + 1); u++) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
         if(H5Gclose(group_id2) < 0) TEST_ERROR
     } /* end for */
@@ -11012,7 +11012,7 @@ corder_transition(hid_t fapl)
 
     /* Delete several links from group, until it resumes compact form */
     for(u = max_compact; u >= min_dense; u--) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if(H5Ldelete(group_id, objname, H5P_DEFAULT) < 0) TEST_ERROR
 
         /* Verify state of group */
@@ -11026,7 +11026,7 @@ corder_transition(hid_t fapl)
     } /* end for */
 
     /* Delete another link, to push group into compact form */
-    sprintf(objname, "filler %u", (min_dense - 1));
+    HDsnprintf(objname, sizeof(objname), "filler %u", (min_dense - 1));
     if(H5Ldelete(group_id, objname, H5P_DEFAULT) < 0) TEST_ERROR
 
     /* Verify state of group */
@@ -11037,7 +11037,7 @@ corder_transition(hid_t fapl)
 
     /* Re-add links to get back into dense form */
     for(u = (min_dense - 1); u < (max_compact + 1); u++) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
         if(H5Gclose(group_id2) < 0) TEST_ERROR
     } /* end for */
@@ -11053,10 +11053,10 @@ corder_transition(hid_t fapl)
 
     /* Delete all the links */
     for(u = max_compact; u > 0; u--) {
-        sprintf(objname, "filler %u", u);
+        HDsnprintf(objname, sizeof(objname), "filler %u", u);
         if(H5Ldelete(group_id, objname, H5P_DEFAULT) < 0) TEST_ERROR
     } /* end for */
-    sprintf(objname, "filler %u", (unsigned)0);
+    HDsnprintf(objname, sizeof(objname), "filler %u", (unsigned)0);
     if(H5Ldelete(group_id, objname, H5P_DEFAULT) < 0) TEST_ERROR
 
     /* Close the group */
@@ -11156,7 +11156,7 @@ corder_delete(hid_t fapl)
 
         /* Create links until the group is in dense form */
         for(u = 0; u < max_compact * 2; u++) {
-            sprintf(objname, "filler %u", u);
+            HDsnprintf(objname, sizeof(objname), "filler %u", u);
             if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) FAIL_STACK_ERROR
             if(H5Gclose(group_id2) < 0) FAIL_STACK_ERROR
         } /* end for */
@@ -11238,7 +11238,7 @@ link_info_by_idx_check(hid_t group_id, const char *linkname, hsize_t n,
     H5L_info_t  linfo;                  /* Link info struct */
 
     /* Make link value for increasing/native order queries */
-    sprintf(valname, "value %02u", (unsigned)n);
+    HDsnprintf(valname, sizeof(valname), "value %02u", (unsigned)n);
 
     /* Verify the link information for first link, in increasing creation order */
     HDmemset(&linfo, 0, sizeof(linfo));
@@ -11449,7 +11449,7 @@ link_info_by_idx(hid_t fapl)
             /* Create several links, up to limit of compact form */
             for(u = 0; u < max_compact; u++) {
                 /* Make name for link */
-                sprintf(objname, "filler %02u", u);
+                HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                 /* Check for creating hard or soft link */
                 if(hard_link) {
@@ -11461,7 +11461,7 @@ link_info_by_idx(hid_t fapl)
                 } /* end if */
                 else {
                     /* Make value for link */
-                    sprintf(valname, "value %02u", u);
+                    HDsnprintf(valname, sizeof(valname), "value %02u", u);
 
                     /* Create soft link */
                     if(H5Lcreate_soft(valname, group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
@@ -11491,7 +11491,7 @@ link_info_by_idx(hid_t fapl)
             /* Create more links, to push group into dense form */
             for(; u < (max_compact * 2); u++) {
                 /* Make name for link */
-                sprintf(objname, "filler %02u", u);
+                HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                 /* Check for creating hard or soft link */
                 if(hard_link) {
@@ -11503,7 +11503,7 @@ link_info_by_idx(hid_t fapl)
                 } /* end if */
                 else {
                     /* Make value for link */
-                    sprintf(valname, "value %02u", u);
+                    HDsnprintf(valname, sizeof(valname), "value %02u", u);
 
                     /* Create soft link */
                     if(H5Lcreate_soft(valname, group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
@@ -11603,7 +11603,7 @@ link_info_by_idx_old(hid_t fapl)
         /* Create several links */
         for(u = 0; u < CORDER_NLINKS; u++) {
             /* Make name for link */
-            sprintf(objname, "filler %02u", u);
+            HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
             /* Check for creating hard or soft link */
             if(hard_link) {
@@ -11621,7 +11621,7 @@ link_info_by_idx_old(hid_t fapl)
             } /* end if */
             else {
                 /* Make value for link */
-                sprintf(valname, "value %02u", u);
+                HDsnprintf(valname, sizeof(valname), "value %02u", u);
 
                 /* Create soft link */
                 if(H5Lcreate_soft(valname, group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
@@ -11633,10 +11633,10 @@ link_info_by_idx_old(hid_t fapl)
             unsigned dec_u = CORDER_NLINKS - (u + 1);       /* Decreasing mapped index */
 
             /* Make link name for increasing/native order queries */
-            sprintf(objname, "filler %02u", u);
+            HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
             /* Make link value for increasing/native order queries */
-            sprintf(valname, "value %02u", u);
+            HDsnprintf(valname, sizeof(valname), "value %02u", u);
 
             /* Verify link information (in increasing order) */
             if(hard_link) {
@@ -11669,10 +11669,10 @@ link_info_by_idx_old(hid_t fapl)
 
 
             /* Make link name for decreasing order queries */
-            sprintf(objname, "filler %02u", dec_u);
+            HDsnprintf(objname, sizeof(objname), "filler %02u", dec_u);
 
             /* Make link value for decreasing order queries */
-            sprintf(valname, "value %02u", dec_u);
+            HDsnprintf(valname, sizeof(valname), "value %02u", dec_u);
 
             /* Verify link information (in decreasing order) */
             if(hard_link) {
@@ -11827,7 +11827,7 @@ delete_by_idx(hid_t fapl)
                     hid_t group_id2;	        /* Group ID */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -11865,9 +11865,9 @@ delete_by_idx(hid_t fapl)
                     HDmemset(tmpname, 0, (size_t)NAME_BUF_SIZE);
                     if(H5Lget_name_by_idx(group_id, ".", idx_type, order, (hsize_t)0, tmpname, (size_t)NAME_BUF_SIZE, H5P_DEFAULT) < 0) TEST_ERROR
                     if(order == H5_ITER_INC)
-                        sprintf(objname, "filler %02u", (u + 1));
+                        HDsnprintf(objname, sizeof(objname), "filler %02u", (u + 1));
                     else
-                        sprintf(objname, "filler %02u", (max_compact - (u + 2)));
+                        HDsnprintf(objname, sizeof(objname), "filler %02u", (max_compact - (u + 2)));
                     if(HDstrcmp(objname, tmpname)) TEST_ERROR
                 } /* end for */
 
@@ -11882,7 +11882,7 @@ delete_by_idx(hid_t fapl)
                     hid_t group_id2;	        /* Group ID */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -11921,9 +11921,9 @@ delete_by_idx(hid_t fapl)
                     HDmemset(tmpname, 0, (size_t)NAME_BUF_SIZE);
                     if(H5Lget_name_by_idx(group_id, ".", idx_type, order, (hsize_t)0, tmpname, (size_t)NAME_BUF_SIZE, H5P_DEFAULT) < 0) TEST_ERROR
                     if(order == H5_ITER_INC)
-                        sprintf(objname, "filler %02u", (u + 1));
+                        HDsnprintf(objname, sizeof(objname), "filler %02u", (u + 1));
                     else
-                        sprintf(objname, "filler %02u", ((max_compact * 2) - (u + 2)));
+                        HDsnprintf(objname, sizeof(objname), "filler %02u", ((max_compact * 2) - (u + 2)));
                     if(HDstrcmp(objname, tmpname)) TEST_ERROR
                 } /* end for */
 
@@ -11949,7 +11949,7 @@ delete_by_idx(hid_t fapl)
                     hid_t group_id2;	        /* Group ID */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -11982,9 +11982,9 @@ delete_by_idx(hid_t fapl)
                     HDmemset(tmpname, 0, (size_t)NAME_BUF_SIZE);
                     if(H5Lget_name_by_idx(group_id, ".", idx_type, order, (hsize_t)u, tmpname, (size_t)NAME_BUF_SIZE, H5P_DEFAULT) < 0) TEST_ERROR
                     if(order == H5_ITER_INC)
-                        sprintf(objname, "filler %02u", ((u * 2) + 1));
+                        HDsnprintf(objname, sizeof(objname), "filler %02u", ((u * 2) + 1));
                     else
-                        sprintf(objname, "filler %02u", ((max_compact * 2) - ((u * 2) + 2)));
+                        HDsnprintf(objname, sizeof(objname), "filler %02u", ((max_compact * 2) - ((u * 2) + 2)));
                     if(HDstrcmp(objname, tmpname)) TEST_ERROR
                 } /* end for */
 
@@ -12007,9 +12007,9 @@ delete_by_idx(hid_t fapl)
                     HDmemset(tmpname, 0, (size_t)NAME_BUF_SIZE);
                     if(H5Lget_name_by_idx(group_id, ".", idx_type, order, (hsize_t)0, tmpname, (size_t)NAME_BUF_SIZE, H5P_DEFAULT) < 0) TEST_ERROR
                     if(order == H5_ITER_INC)
-                        sprintf(objname, "filler %02u", ((u * 2) + 3));
+                        HDsnprintf(objname, sizeof(objname), "filler %02u", ((u * 2) + 3));
                     else
-                        sprintf(objname, "filler %02u", ((max_compact * 2) - ((u * 2) + 4)));
+                        HDsnprintf(objname, sizeof(objname), "filler %02u", ((max_compact * 2) - ((u * 2) + 4)));
                     if(HDstrcmp(objname, tmpname)) TEST_ERROR
                 } /* end for */
 
@@ -12106,7 +12106,7 @@ delete_by_idx_old(hid_t fapl)
             H5O_info_t oi;                  /* Buffer for querying object's info */
 
             /* Make name for link */
-            sprintf(objname, "filler %02u", u);
+            HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
             /* Create group */
             if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -12152,9 +12152,9 @@ delete_by_idx_old(hid_t fapl)
             HDmemset(tmpname, 0, (size_t)NAME_BUF_SIZE);
             if(H5Lget_name_by_idx(group_id, ".", H5_INDEX_NAME, order, (hsize_t)0, tmpname, (size_t)NAME_BUF_SIZE, H5P_DEFAULT) < 0) TEST_ERROR
             if(order == H5_ITER_INC)
-                sprintf(objname, "filler %02u", (u + 1));
+                HDsnprintf(objname, sizeof(objname), "filler %02u", (u + 1));
             else
-                sprintf(objname, "filler %02u", dec_u);
+                HDsnprintf(objname, sizeof(objname), "filler %02u", dec_u);
             if(HDstrcmp(objname, tmpname)) TEST_ERROR
         } /* end for */
 
@@ -12179,7 +12179,7 @@ delete_by_idx_old(hid_t fapl)
             H5O_info_t oi;                  /* Buffer for querying object's info */
 
             /* Make name for link */
-            sprintf(objname, "filler %02u", u);
+            HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
             /* Create group */
             if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -12213,9 +12213,9 @@ delete_by_idx_old(hid_t fapl)
             HDmemset(tmpname, 0, (size_t)NAME_BUF_SIZE);
             if(H5Lget_name_by_idx(group_id, ".", H5_INDEX_NAME, order, (hsize_t)u, tmpname, (size_t)NAME_BUF_SIZE, H5P_DEFAULT) < 0) TEST_ERROR
             if(order == H5_ITER_INC)
-                sprintf(objname, "filler %02u", ((u * 2) + 1));
+                HDsnprintf(objname, sizeof(objname), "filler %02u", ((u * 2) + 1));
             else
-                sprintf(objname, "filler %02u", dec_u);
+                HDsnprintf(objname, sizeof(objname), "filler %02u", dec_u);
             if(HDstrcmp(objname, tmpname)) TEST_ERROR
         } /* end for */
 
@@ -12240,9 +12240,9 @@ delete_by_idx_old(hid_t fapl)
             HDmemset(tmpname, 0, (size_t)NAME_BUF_SIZE);
             if(H5Lget_name_by_idx(group_id, ".", H5_INDEX_NAME, order, (hsize_t)0, tmpname, (size_t)NAME_BUF_SIZE, H5P_DEFAULT) < 0) TEST_ERROR
             if(order == H5_ITER_INC)
-                sprintf(objname, "filler %02u", ((u * 2) + 3));
+                HDsnprintf(objname, sizeof(objname), "filler %02u", ((u * 2) + 3));
             else
-                sprintf(objname, "filler %02u", dec_u);
+                HDsnprintf(objname, sizeof(objname), "filler %02u", dec_u);
             if(HDstrcmp(objname, tmpname)) TEST_ERROR
         } /* end for */
 
@@ -12323,7 +12323,7 @@ link_iterate_cb(hid_t group_id, const char *link_name, const H5L_info_t *info,
     } /* end if */
 
     /* Verify name of link */
-    sprintf(objname, "filler %02u", (unsigned)my_info.corder);
+    HDsnprintf(objname, sizeof(objname), "filler %02u", (unsigned)my_info.corder);
     if(HDstrcmp(link_name, objname))
         return(H5_ITER_ERROR);
 
@@ -12669,7 +12669,7 @@ link_iterate(hid_t fapl)
                     hid_t group_id2;	        /* Group ID */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -12695,7 +12695,7 @@ link_iterate(hid_t fapl)
                     hid_t group_id2;	        /* Group ID */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -12795,7 +12795,7 @@ link_iterate_old_cb(hid_t group_id, const char *link_name, const H5L_info_t *inf
     } /* end if */
 
     /* Verify name of link */
-    sprintf(objname, "filler %02u", (info ? (unsigned)op_data->curr : (unsigned)((op_data->ncalled - 1) + op_data->nskipped)));
+    HDsnprintf(objname, sizeof(objname), "filler %02u", (info ? (unsigned)op_data->curr : (unsigned)((op_data->ncalled - 1) + op_data->nskipped)));
     if(HDstrcmp(link_name, objname))
         return(H5_ITER_ERROR);
 
@@ -13082,7 +13082,7 @@ link_iterate_old(hid_t fapl)
             hid_t group_id2;	        /* Group ID */
 
             /* Make name for link */
-            sprintf(objname, "filler %02u", u);
+            HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
             /* Create hard link, with group object */
             if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -13211,7 +13211,7 @@ open_by_idx_check(hid_t main_group_id, hid_t soft_group_id, hid_t mount_file_id,
 
     /* Mount a file over a group in main group */
     mnt_idx = 2;
-    sprintf(mntname, "/%s/filler %02u", CORDER_GROUP_NAME, mnt_idx);
+    HDsnprintf(mntname, sizeof(mntname), "/%s/filler %02u", CORDER_GROUP_NAME, mnt_idx);
     if(H5Fmount(main_group_id, mntname, mount_file_id, H5P_DEFAULT) < 0) TEST_ERROR
 
     /* Open the object that the file is mounted on */
@@ -13269,7 +13269,7 @@ open_by_idx(hid_t fapl)
     H5O_info_t  oi;                     /* Buffer for querying object's info */
     char        filename[NAME_BUF_SIZE];/* File name */
     char        objname[NAME_BUF_SIZE]; /* Object name */
-    char        valname[NAME_BUF_SIZE]; /* Link value */
+    char        valname[2 * NAME_BUF_SIZE]; /* Link value */
     haddr_t     *objno = NULL;          /* Addresses of the objects created */
     unsigned    u;                      /* Local index variable */
     hid_t       ret;                    /* Generic return value */
@@ -13363,7 +13363,7 @@ open_by_idx(hid_t fapl)
                     hid_t group_id2;	        /* Group ID */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -13376,7 +13376,7 @@ open_by_idx(hid_t fapl)
                     if(H5Gclose(group_id2) < 0) TEST_ERROR
 
                     /* Create soft link in another group, to objects in main group */
-                    sprintf(valname, "/%s/%s", CORDER_GROUP_NAME, objname);
+                    HDsnprintf(valname, sizeof(valname), "/%s/%s", CORDER_GROUP_NAME, objname);
                     if(H5Lcreate_soft(valname, soft_group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
                 } /* end for */
 
@@ -13398,7 +13398,7 @@ open_by_idx(hid_t fapl)
                     hid_t group_id2;	        /* Group ID */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -13411,7 +13411,7 @@ open_by_idx(hid_t fapl)
                     if(H5Gclose(group_id2) < 0) TEST_ERROR
 
                     /* Create soft link in another group, to objects in main group */
-                    sprintf(valname, "/%s/%s", CORDER_GROUP_NAME, objname);
+                    HDsnprintf(valname, sizeof(valname), "/%s/%s", CORDER_GROUP_NAME, objname);
                     if(H5Lcreate_soft(valname, soft_group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
                 } /* end for */
 
@@ -13494,7 +13494,7 @@ open_by_idx_old(hid_t fapl)
     H5O_info_t  oi;                     /* Buffer for querying object's info */
     char        filename[NAME_BUF_SIZE];/* File name */
     char        objname[NAME_BUF_SIZE]; /* Object name */
-    char        valname[NAME_BUF_SIZE]; /* Link value */
+    char        valname[2 * NAME_BUF_SIZE]; /* Link value */
     haddr_t     objno[CORDER_NLINKS];   /* Addresses of the objects created */
     unsigned    u;                      /* Local index variable */
     hid_t       ret;                    /* Generic return value */
@@ -13540,7 +13540,7 @@ open_by_idx_old(hid_t fapl)
             hid_t group_id2;	        /* Group ID */
 
             /* Make name for link */
-            sprintf(objname, "filler %02u", u);
+            HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
             /* Create hard link, with group object */
             if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -13553,7 +13553,7 @@ open_by_idx_old(hid_t fapl)
             if(H5Gclose(group_id2) < 0) TEST_ERROR
 
             /* Create soft link in another group, to objects in main group */
-            sprintf(valname, "/%s/%s", CORDER_GROUP_NAME, objname);
+            HDsnprintf(valname, sizeof(valname), "/%s/%s", CORDER_GROUP_NAME, objname);
             if(H5Lcreate_soft(valname, soft_group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
         } /* end for */
 
@@ -13637,7 +13637,7 @@ object_info_check(hid_t main_group_id, hid_t soft_group_id, H5_index_t idx_type,
         /* Open each object in group by name and check that it's the correct one */
         for(u = 0; u < max_links; u++) {
             /* Make name for link */
-            sprintf(objname, "filler %02u", u);
+            HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
             /* Query the object's information, by name */
             if(H5Oget_info_by_name2(group_id, objname, &oinfo, H5O_INFO_BASIC|H5O_INFO_NUM_ATTRS, H5P_DEFAULT) < 0) TEST_ERROR
@@ -13705,7 +13705,7 @@ object_info(hid_t fapl)
     H5O_info_t  oinfo;                  /* Buffer for querying object's info */
     char        filename[NAME_BUF_SIZE];/* File name */
     char        objname[NAME_BUF_SIZE]; /* Object name */
-    char        valname[NAME_BUF_SIZE]; /* Link value */
+    char        valname[2 * NAME_BUF_SIZE]; /* Link value */
     char        attrname[NAME_BUF_SIZE]; /* Attribute name */
     haddr_t     *objno = NULL;          /* Addresses of the objects created */
     herr_t      ret;                    /* Generic return value */
@@ -13799,7 +13799,7 @@ object_info(hid_t fapl)
                     hid_t attr_id;              /* Attribute ID */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -13811,7 +13811,7 @@ object_info(hid_t fapl)
                     /* Create attributes on new object */
                     for(v = 0; v < u; v++) {
                         /* Make name for attribute */
-                        sprintf(attrname, "attr %02u", v);
+                        HDsnprintf(attrname, sizeof(attrname), "attr %02u", v);
 
                         /* Create attribute */
                         if((attr_id = H5Acreate2(group_id2, attrname, H5T_NATIVE_INT, space_id, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -13824,7 +13824,7 @@ object_info(hid_t fapl)
                     if(H5Gclose(group_id2) < 0) TEST_ERROR
 
                     /* Create soft link in another group, to objects in main group */
-                    sprintf(valname, "/%s/%s", CORDER_GROUP_NAME, objname);
+                    HDsnprintf(valname, sizeof(valname), "/%s/%s", CORDER_GROUP_NAME, objname);
                     if(H5Lcreate_soft(valname, soft_group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
                 } /* end for */
 
@@ -13847,7 +13847,7 @@ object_info(hid_t fapl)
                     hid_t attr_id;              /* Attribute ID */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -13859,7 +13859,7 @@ object_info(hid_t fapl)
                     /* Create attributes on new object */
                     for(v = 0; v < u; v++) {
                         /* Make name for attribute */
-                        sprintf(attrname, "attr %02u", v);
+                        HDsnprintf(attrname, sizeof(attrname), "attr %02u", v);
 
                         /* Create attribute */
                         if((attr_id = H5Acreate2(group_id2, attrname, H5T_NATIVE_INT, space_id, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -13872,7 +13872,7 @@ object_info(hid_t fapl)
                     if(H5Gclose(group_id2) < 0) TEST_ERROR
 
                     /* Create soft link in another group, to objects in main group */
-                    sprintf(valname, "/%s/%s", CORDER_GROUP_NAME, objname);
+                    HDsnprintf(valname, sizeof(valname), "/%s/%s", CORDER_GROUP_NAME, objname);
                     if(H5Lcreate_soft(valname, soft_group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
                 } /* end for */
 
@@ -13950,7 +13950,7 @@ object_info_old(hid_t fapl)
     H5O_info_t  oinfo;                  /* Buffer for querying object's info */
     char        filename[NAME_BUF_SIZE];/* File name */
     char        objname[NAME_BUF_SIZE]; /* Object name */
-    char        valname[NAME_BUF_SIZE]; /* Link value */
+    char        valname[2 * NAME_BUF_SIZE]; /* Link value */
     char        attrname[NAME_BUF_SIZE]; /* Attribute name */
     haddr_t     objno[CORDER_NLINKS];   /* Addresses of the objects created */
     herr_t      ret;                    /* Generic return value */
@@ -13996,7 +13996,7 @@ object_info_old(hid_t fapl)
             hid_t attr_id;              /* Attribute ID */
 
             /* Make name for link */
-            sprintf(objname, "filler %02u", u);
+            HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
             /* Create hard link, with group object */
             if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -14008,7 +14008,7 @@ object_info_old(hid_t fapl)
             /* Create attributes on new object */
             for(v = 0; v < u; v++) {
                 /* Make name for attribute */
-                sprintf(attrname, "attr %02u", v);
+                HDsnprintf(attrname, sizeof(attrname), "attr %02u", v);
 
                 /* Create attribute */
                 if((attr_id = H5Acreate2(group_id2, attrname, H5T_NATIVE_INT, space_id, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -14021,7 +14021,7 @@ object_info_old(hid_t fapl)
             if(H5Gclose(group_id2) < 0) TEST_ERROR
 
             /* Create soft link in another group, to objects in main group */
-            sprintf(valname, "/%s/%s", CORDER_GROUP_NAME, objname);
+            HDsnprintf(valname, sizeof(valname), "/%s/%s", CORDER_GROUP_NAME, objname);
             if(H5Lcreate_soft(valname, soft_group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
         } /* end for */
 
@@ -14102,7 +14102,7 @@ group_info(hid_t fapl)
     char        filename[NAME_BUF_SIZE];/* File name */
     char        objname[NAME_BUF_SIZE]; /* Object name */
     char        objname2[NAME_BUF_SIZE]; /* Object name */
-    char        valname[NAME_BUF_SIZE]; /* Link value */
+    char        valname[2 * NAME_BUF_SIZE]; /* Link value */
     herr_t      ret;                    /* Generic return value */
     unsigned    u, v;                   /* Local index variables */
 
@@ -14187,7 +14187,7 @@ group_info(hid_t fapl)
                     hid_t group_id2, group_id3;	        /* Group IDs */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, gcpl_id, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -14221,7 +14221,7 @@ group_info(hid_t fapl)
                     /* Create objects in new group created */
                     for(v = 0; v <= u; v++) {
                         /* Make name for link */
-                        sprintf(objname2, "filler %02u", v);
+                        HDsnprintf(objname2, sizeof(objname2), "filler %02u", v);
 
                         /* Create hard link, with group object */
                         if((group_id3 = H5Gcreate2(group_id2, objname2, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -14301,7 +14301,7 @@ group_info(hid_t fapl)
 
 
                     /* Create soft link in another group, to objects in main group */
-                    sprintf(valname, "/%s/%s", CORDER_GROUP_NAME, objname);
+                    HDsnprintf(valname, sizeof(valname), "/%s/%s", CORDER_GROUP_NAME, objname);
                     if(H5Lcreate_soft(valname, soft_group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
 
                     /* Retrieve soft link group's information, by name */
@@ -14328,7 +14328,7 @@ group_info(hid_t fapl)
                     hid_t group_id2, group_id3;	        /* Group IDs */
 
                     /* Make name for link */
-                    sprintf(objname, "filler %02u", u);
+                    HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
                     /* Create hard link, with group object */
                     if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, gcpl_id, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -14362,7 +14362,7 @@ group_info(hid_t fapl)
                     /* Create objects in new group created */
                     for(v = 0; v <= u; v++) {
                         /* Make name for link */
-                        sprintf(objname2, "filler %02u", v);
+                        HDsnprintf(objname2, sizeof(objname2), "filler %02u", v);
 
                         /* Create hard link, with group object */
                         if((group_id3 = H5Gcreate2(group_id2, objname2, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -14442,7 +14442,7 @@ group_info(hid_t fapl)
 
 
                     /* Create soft link in another group, to objects in main group */
-                    sprintf(valname, "/%s/%s", CORDER_GROUP_NAME, objname);
+                    HDsnprintf(valname, sizeof(valname), "/%s/%s", CORDER_GROUP_NAME, objname);
                     if(H5Lcreate_soft(valname, soft_group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
 
                     /* Retrieve soft link group's information, by name */
@@ -14519,7 +14519,7 @@ group_info_old(hid_t fapl)
     char        filename[NAME_BUF_SIZE];/* File name */
     char        objname[NAME_BUF_SIZE]; /* Object name */
     char        objname2[NAME_BUF_SIZE]; /* Object name */
-    char        valname[NAME_BUF_SIZE]; /* Link value */
+    char        valname[2 * NAME_BUF_SIZE]; /* Link value */
     herr_t      ret;                    /* Generic return value */
     unsigned    u, v;                   /* Local index variables */
 
@@ -14558,7 +14558,7 @@ group_info_old(hid_t fapl)
             hid_t group_id2, group_id3;	        /* Group IDs */
 
             /* Make name for link */
-            sprintf(objname, "filler %02u", u);
+            HDsnprintf(objname, sizeof(objname), "filler %02u", u);
 
             /* Create hard link, with group object */
             if((group_id2 = H5Gcreate2(group_id, objname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -14592,7 +14592,7 @@ group_info_old(hid_t fapl)
             /* Create objects in new group created */
             for(v = 0; v <= u; v++) {
                 /* Make name for link */
-                sprintf(objname2, "filler %02u", v);
+                HDsnprintf(objname2, sizeof(objname2), "filler %02u", v);
 
                 /* Create hard link, with group object */
                 if((group_id3 = H5Gcreate2(group_id2, objname2, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
@@ -14672,7 +14672,7 @@ group_info_old(hid_t fapl)
 
 
             /* Create soft link in another group, to objects in main group */
-            sprintf(valname, "/%s/%s", CORDER_GROUP_NAME, objname);
+            HDsnprintf(valname, sizeof(valname), "/%s/%s", CORDER_GROUP_NAME, objname);
             if(H5Lcreate_soft(valname, soft_group_id, objname, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
 
             /* Retrieve soft link group's information, by name */
diff --git a/test/objcopy.c b/test/objcopy.c
index e646c87..1f89e16 100644
--- a/test/objcopy.c
+++ b/test/objcopy.c
@@ -986,15 +986,15 @@ compare_data(hid_t parent1, hid_t parent2, hid_t pid, hid_t tid, size_t nelmts,
                  * for each */
                 for(elmt=0; elmt<nelmts; elmt++) {
                     /* Check vlen lengths */
-                    if(((const hvl_t *)memb1)->len
-                            != ((const hvl_t *)memb2)->len)
+                    if(((const hvl_t *)((const void *)memb1))->len
+                            != ((const hvl_t *)((const void *)memb2))->len)
                         TEST_ERROR
 
                     /* Check vlen data */
                     if(!compare_data(parent1, parent2, pid, base_id,
-                            ((const hvl_t *)memb1)->len,
-                            ((const hvl_t *)memb1)->p,
-                            ((const hvl_t *)memb2)->p, obj_owner))
+                            ((const hvl_t *)((const void *)memb1))->len,
+                            ((const hvl_t *)((const void *)memb1))->p,
+                            ((const hvl_t *)((const void *)memb2))->p, obj_owner))
                         TEST_ERROR
 
                     /* Update member pointers */
@@ -13425,7 +13425,7 @@ test_copy_iterate(hid_t fcpl_src, hid_t fcpl_dst, hid_t src_fapl, hid_t dst_fapl
     hid_t fid1 = -1, fid2 = -1;                 /* File IDs */
     hid_t gid = -1;                             /* Group ID */
     int i;
-    char grp_name[8];
+    char grp_name[16];
     char src_filename[NAME_BUF_SIZE];
     char dst_filename[NAME_BUF_SIZE];
 
diff --git a/test/tarray.c b/test/tarray.c
index d8ededf..eb71ad6 100644
--- a/test/tarray.c
+++ b/test/tarray.c
@@ -1074,7 +1074,7 @@ test_array_free_custom(void *_mem, void *info)
 
     if(_mem != NULL) {
         mem = ((unsigned char *)_mem) - extra;
-        *mem_used -= *(size_t *)mem;
+        *mem_used -= *(size_t *)((void *)mem);
         HDfree(mem);
     } /* end if */
 
diff --git a/test/tchecksum.c b/test/tchecksum.c
index ffbab45..6e509fb 100644
--- a/test/tchecksum.c
+++ b/test/tchecksum.c
@@ -252,7 +252,7 @@ test_checksum(void)
  *
  *-------------------------------------------------------------------------
  */
-H5_ATTR_PURE H5_ATTR_CONST void
+void
 cleanup_checksum(void)
 {
     /* no file to clean */
diff --git a/test/tconfig.c b/test/tconfig.c
index b652ca4..1a81d50 100644
--- a/test/tconfig.c
+++ b/test/tconfig.c
@@ -83,7 +83,7 @@ test_configure(void)
  *
  *-------------------------------------------------------------------------
  */
-H5_ATTR_PURE void
+void
 cleanup_configure(void)
 {
     /* no file to clean */
@@ -106,7 +106,7 @@ cleanup_configure(void)
  *
  *-------------------------------------------------------------------------
  */
-H5_ATTR_PURE void
+void
 test_config_ctypes(void)
 {
     /* standard C89 basic types */
@@ -215,7 +215,7 @@ test_config_ctypes(void)
  *
  *-------------------------------------------------------------------------
  */
-H5_ATTR_PURE void
+void
 test_exit_definitions(void)
 {
     /* Verify the EXIT_SUCCESS and EXIT_FAILURE are 0 and 1 respectively. */
diff --git a/test/tmeta.c b/test/tmeta.c
index 7eeb493..ceb7d2b 100644
--- a/test/tmeta.c
+++ b/test/tmeta.c
@@ -121,7 +121,7 @@ test_metadata(void)
  *
  *-------------------------------------------------------------------------
  */
-H5_ATTR_PURE H5_ATTR_CONST void
+void
 cleanup_metadata(void)
 {
     /* no file to clean */
diff --git a/test/tsohm.c b/test/tsohm.c
index 5c3707f..8cf4d2f 100644
--- a/test/tsohm.c
+++ b/test/tsohm.c
@@ -595,7 +595,7 @@ error:
  *-------------------------------------------------------------------------
  */
 static hid_t
-size1_helper(hid_t file, const char *filename, hid_t fapl_id, int test_file_closing)
+size1_helper(hid_t file, const char *filename, hid_t fapl_id, unsigned test_file_closing)
 {
     dtype1_struct wdata;
     dtype1_struct rdata;
@@ -749,10 +749,10 @@ getsize_testsize1(const char *filename, hid_t fcpl_id, hid_t fapl_id, unsigned o
     hid_t file = -1;
     herr_t ret;
 
-    file = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, fapl_id);
+    file = H5Fcreate(filename, H5F_ACC_TRUNC, fcpl_id, fapl_id);
     CHECK_I(file, "H5Fcreate");
 
-    file = size1_helper(file, FILENAME, fapl_id, open_close);
+    file = size1_helper(file, filename, fapl_id, open_close);
     CHECK_I(file, "size1_helper");
 
     ret = H5Oget_info_by_name2(file, DSETNAME[0], oinfo, H5O_INFO_HDR, H5P_DEFAULT);
@@ -761,7 +761,7 @@ getsize_testsize1(const char *filename, hid_t fcpl_id, hid_t fapl_id, unsigned o
     ret = H5Fclose(file);
     CHECK_I(ret, "H5Fclose");
 
-    return h5_get_file_size(FILENAME, fapl_id);
+    return h5_get_file_size(filename, fapl_id);
 } /* getsize_testsize1 */
 
 
@@ -790,7 +790,9 @@ test_sohm_size1(void)
     hsize_t        oh_sizes[3];
     unsigned       oh_size_index = 0;
 
+#if 0 /* TBD: lying comment or bug. See Jira HDFFV-10646 */
     hsize_t        norm_oh_size;
+#endif /* Jira HDFFV-10646 */
     hsize_t        sohm_oh_size;
     hsize_t        sohm_btree_oh_size;
     h5_stat_size_t norm_empty_filesize;
@@ -886,7 +888,9 @@ test_sohm_size1(void)
     norm_empty_filesize = file_sizes[0];
     norm_final_filesize = file_sizes[1];
     norm_final_filesize2 = file_sizes[2];
+#if 0 /* TBD: lying comment or bug. See Jira HDFFV-10646 */
     norm_oh_size = oh_sizes[0];
+#endif /* Jira HDFFV-10646 */
 
     sohm_empty_filesize = file_sizes[3];
     sohm_final_filesize = file_sizes[4];
@@ -941,6 +945,7 @@ test_sohm_size1(void)
 
 } /* test_sohm_size1 */
 
+#if 0 /* TODO: REVEALS BUG TO BE FIXED - SEE JIRA HDFFV-10645 */
 
 /*---------------------------------------------------------------------------
  * Function:    test_sohm_size_consistency_open_create
@@ -1045,6 +1050,7 @@ test_sohm_size_consistency_open_create(void)
     ret = H5Pclose(fapl_id);
     CHECK_I(ret, "H5Pclose");
 } /* test_sohm_size_consistency_open_create */
+#endif /* Jira HDFFV-10645 */
 
 
 /*-------------------------------------------------------------------------
@@ -1176,6 +1182,7 @@ static void
 test_sohm_attrs(void)
 {
     hid_t fcpl_id;
+    hid_t file_id;
     unsigned i = 0;
 #define TSOHM_TSA_NFLAGS_1 7
     unsigned flags1[TSOHM_TSA_NFLAGS_1] = {
@@ -1293,8 +1300,8 @@ test_sohm_attrs(void)
         ret = H5Pset_shared_mesg_index(fcpl_id, 1, H5O_SHMESG_ATTR_FLAG, 2);
         CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
 
-        ret = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
-        VERIFY(ret, -1, "H5Fcreate");
+        file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
+        VERIFY(file_id, -1, "H5Fcreate");
 
         ret = H5Pclose(fcpl_id);
         CHECK_I(ret, "H5Pclose");
diff --git a/test/tvlstr.c b/test/tvlstr.c
index 77589bb..5f715ce 100644
--- a/test/tvlstr.c
+++ b/test/tvlstr.c
@@ -94,7 +94,7 @@ void test_vlstr_free_custom(void *_mem, void *info)
 
     if(_mem!=NULL) {
         mem=((unsigned char *)_mem)-extra;
-        *mem_used-=*(size_t *)mem;
+        *mem_used-=*(size_t *)((void *)mem);
         HDfree(mem);
     } /* end if */
 }
diff --git a/test/tvltypes.c b/test/tvltypes.c
index 8824066..ffa2aff 100644
--- a/test/tvltypes.c
+++ b/test/tvltypes.c
@@ -88,7 +88,7 @@ void test_vltypes_free_custom(void *_mem, void *mem_used)
                                                                  */
         unsigned char *mem = ((unsigned char *)_mem) - extra;   /* Pointer to actual block allocated */
 
-        *(size_t *)mem_used -= *(size_t *)mem;
+        *(size_t *)mem_used -= *(size_t *)((void *)mem);
         HDfree(mem);
     } /* end if */
 }
diff --git a/test/vds.c b/test/vds.c
index 5870d49..a042a75 100644
--- a/test/vds.c
+++ b/test/vds.c
@@ -12152,7 +12152,6 @@ main(void)
     hid_t my_fapl = -1;         /* File access property list */
     int test_api_config;
     unsigned bit_config;
-    unsigned latest = FALSE;    /* Using the latest library version bound */
     H5F_libver_t low, high;     /* Low and high bounds */
     int nerrors = 0;
 
@@ -12180,10 +12179,6 @@ main(void)
             if(high < H5F_LIBVER_V110)
                 continue;
 
-            /* Whether to use latest hyperslab/point selection version */
-            if(low >= H5F_LIBVER_V112)
-                latest = TRUE;
-
             /* Set the low/high version bounds */
             if(H5Pset_libver_bounds(my_fapl, low, high) < 0)
                 TEST_ERROR
diff --git a/test/vds_env.c b/test/vds_env.c
index d3a28fb..9c7b698 100644
--- a/test/vds_env.c
+++ b/test/vds_env.c
@@ -302,7 +302,6 @@ main(void)
     hid_t fapl, my_fapl;
     unsigned bit_config;
     H5F_libver_t low, high;     /* Low and high bounds */
-    unsigned latest = FALSE;    /* Using the latest library version bound */
     int nerrors = 0;
 
     /* Testing setup */
@@ -327,10 +326,6 @@ main(void)
             if(high < H5F_LIBVER_V110)
                 continue;
 
-            /* Whether to use latest hyperslab/point selection version */
-            if(low >= H5F_LIBVER_V112)
-                latest = TRUE;
-
             /* Set the low/high version bounds */
             if(H5Pset_libver_bounds(my_fapl, low, high) < 0)
                 TEST_ERROR