GCC atomics: acquire thread-fence was busted until GCC 8.1.0

devreal · devreal · commit e72273a16345 · 2022-08-26T16:29:54.000-04:00
Signed-off-by: Joseph Schuchart &lt;schuchart@icl.utk.edu&gt;
diff --git a/opal/include/opal/sys/gcc_builtin/atomic.h b/opal/include/opal/sys/gcc_builtin/atomic.h
@@ -36,7 +36,7 @@
  *
  *********************************************************************/
 
-#if defined(PLATFORM_ARCH_X86_64) && defined (__GNUC__) && !defined(__llvm) && (__GNUC__ < 6)
+#if defined(PLATFORM_ARCH_X86_64) && defined(PLATFORM_COMPILER_GNU) && __GNUC__ < 8
     /* work around a bug in older gcc versions where ACQUIRE seems to get
      * treated as a no-op instead */
 #define OPAL_BUSTED_ATOMIC_MB 1

Original file line number	Diff line number	Diff line change
`@@ -36,7 +36,7 @@`
`36`	`36`	`*`
`37`	`37`	`*********************************************************************/`
`38`	`38`
`39`		`-#if defined(PLATFORM_ARCH_X86_64) && defined (__GNUC__) && !defined(__llvm) && (__GNUC__ < 6)`
	`39`	`+#if defined(PLATFORM_ARCH_X86_64) && defined(PLATFORM_COMPILER_GNU) && __GNUC__ < 8`
`40`	`40`	`/* work around a bug in older gcc versions where ACQUIRE seems to get`
`41`	`41`	`* treated as a no-op instead */`
`42`	`42`	`#define OPAL_BUSTED_ATOMIC_MB 1`