Use pthread_set_name_np when it available

bin/varnishd/cache/cache_main.c

@@ -130,6 +130,7 @@ THR_GetWorker(void)
 
 static pthread_key_t name_key;
 
+#ifdef HAVE_PTHREAD_SETNAME_NP
 static void
 thr_setname_generic(const char *name)
 {
@@ -146,18 +147,23 @@ thr_setname_generic(const char *name)
 	//lint --e{438} Last value assigned not used
 	PTOK(pthread_setname_np(pthread_self(), name));
 }
+#endif
 
 void
 THR_SetName(const char *name)
 {
 
 	PTOK(pthread_setspecific(name_key, name));
-#if defined(__APPLE__)
+#if defined(HAVE_PTHREAD_SETNAME_NP)
+#  if defined(__APPLE__)
 	(void)pthread_setname_np(name);
-#elif defined(__NetBSD__)
+#  elif defined(__NetBSD__)
 	(void)pthread_setname_np(pthread_self(), "%s", (char *)(uintptr_t)name);
-#else
+#  else
 	thr_setname_generic(name);
+#  endif
+#elif defined(HAVE_PTHREAD_SET_NAME_NP)
+	(void)pthread_set_name_np(pthread_self(), name);
 #endif
 }
 

configure.ac

@@ -227,6 +227,8 @@ AC_CHECK_FUNCS([fnmatch], [], [AC_MSG_ERROR([fnmatch(3) is required])])
 
 save_LIBS="${LIBS}"
 LIBS="${PTHREAD_LIBS}"
+AC_CHECK_FUNCS([pthread_setname_np])
+AC_CHECK_FUNCS([pthread_set_name_np])
 AC_CHECK_FUNCS([pthread_mutex_isowned_np])
 AC_CHECK_FUNCS([pthread_getattr_np])
 LIBS="${save_LIBS}"