[OpenMP] Remove compiler warning about unused value

[protze.joachim]

Summary

The compiler warns about an unused variable/statement:

runtime/src/kmp_affinity.cpp:4958:18: warning: statement has no effect [-Wunused-value]
   KA_TRACE(1000, ; {
                  ^
runtime/src/kmp_debug.h:84:24: note: in definition of macro 'KA_TRACE'
     __kmp_debug_printf x;                                                      \
                        ^

Instead of the unused reference to this function, this patch now calls the function with an empty string.
As I understand the function, this should have no effect.

[AndreyChurbanov]

LGTM

runtime/src/kmp_affinity.cpp

int __kmp_aux_set_affinity(void **mask) {
   kmp_info_t *th;
   int retval;
 
   if (!KMP_AFFINITY_CAPABLE()) {
     return -1;
   }
 
   gtid = __kmp_entry_gtid();
-  KA_TRACE(1000, ; {
+  KA_TRACE(1000, (""); {
     char buf[KMP_AFFIN_MASK_PRINT_LEN];
     __kmp_affinity_print_mask(buf, KMP_AFFIN_MASK_PRINT_LEN,
                               (kmp_affin_mask_t *)(*mask));
     __kmp_debug_printf(
         "kmp_set_affinity: setting affinity mask for thread %d = %s\n", gtid,
         buf);
   });
 
int __kmp_aux_get_affinity(void **mask) {
   if (!KMP_AFFINITY_CAPABLE()) {
     return -1;
   }
 
   gtid = __kmp_entry_gtid();
   th = __kmp_threads[gtid];
   KMP_DEBUG_ASSERT(th->th.th_affin_mask != NULL);
 
-  KA_TRACE(1000, ; {
+  KA_TRACE(1000, (""); {
     char buf[KMP_AFFIN_MASK_PRINT_LEN];
     __kmp_affinity_print_mask(buf, KMP_AFFIN_MASK_PRINT_LEN,
                               th->th.th_affin_mask);
     __kmp_printf("kmp_get_affinity: stored affinity mask for thread %d = %s\n",
                  gtid, buf);
   });
 
   if (__kmp_env_consistency_check) {
     if ((mask == NULL) || (*mask == NULL)) {
       KMP_FATAL(AffinityInvalidMask, "kmp_get_affinity");
     }
   }
 
 #if !KMP_OS_WINDOWS
 
   retval = __kmp_get_system_affinity((kmp_affin_mask_t *)(*mask), FALSE);
-  KA_TRACE(1000, ; {
+  KA_TRACE(1000, (""); {
     char buf[KMP_AFFIN_MASK_PRINT_LEN];
     __kmp_affinity_print_mask(buf, KMP_AFFIN_MASK_PRINT_LEN,
                               (kmp_affin_mask_t *)(*mask));
     __kmp_printf("kmp_get_affinity: system affinity mask for thread %d = %s\n",
                  gtid, buf);
   });
   return retval;
 
#endif
   return __kmp_xproc;
 }
 
 int __kmp_aux_set_affinity_mask_proc(int proc, void **mask) {
   if (!KMP_AFFINITY_CAPABLE()) {
     return -1;
   }
 
-  KA_TRACE(1000, ; {
+  KA_TRACE(1000, (""); {
     int gtid = __kmp_entry_gtid();
     char buf[KMP_AFFIN_MASK_PRINT_LEN];
     __kmp_affinity_print_mask(buf, KMP_AFFIN_MASK_PRINT_LEN,
                               (kmp_affin_mask_t *)(*mask));
     __kmp_debug_printf("kmp_set_affinity_mask_proc: setting proc %d in "
                        "affinity mask for thread %d = %s\n",
                        proc, gtid, buf);
   });
int __kmp_aux_set_affinity_mask_proc(int proc, void **mask) {
   return 0;
 }
 
 int __kmp_aux_unset_affinity_mask_proc(int proc, void **mask) {
   if (!KMP_AFFINITY_CAPABLE()) {
     return -1;
   }
 
-  KA_TRACE(1000, ; {
+  KA_TRACE(1000, (""); {
     int gtid = __kmp_entry_gtid();
     char buf[KMP_AFFIN_MASK_PRINT_LEN];
     __kmp_affinity_print_mask(buf, KMP_AFFIN_MASK_PRINT_LEN,
                               (kmp_affin_mask_t *)(*mask));
     __kmp_debug_printf("kmp_unset_affinity_mask_proc: unsetting proc %d in "
                        "affinity mask for thread %d = %s\n",
                        proc, gtid, buf);
   });
int __kmp_aux_unset_affinity_mask_proc(int proc, void **mask) {
   return 0;
 }
 
 int __kmp_aux_get_affinity_mask_proc(int proc, void **mask) {
   if (!KMP_AFFINITY_CAPABLE()) {
     return -1;
   }
 
-  KA_TRACE(1000, ; {
+  KA_TRACE(1000, (""); {
     int gtid = __kmp_entry_gtid();
     char buf[KMP_AFFIN_MASK_PRINT_LEN];
     __kmp_affinity_print_mask(buf, KMP_AFFIN_MASK_PRINT_LEN,
                               (kmp_affin_mask_t *)(*mask));
     __kmp_debug_printf("kmp_get_affinity_mask_proc: getting proc %d in "
                        "affinity mask for thread %d = %s\n",
                        proc, gtid, buf);
   });