libcpp: Fix ATTR_LIKELY definition PR preprocessor/103355

Fix the definition of ATTR_LIKELY when __has_cpp_attribute is not
defined, as it is the case with old compilers such as gcc-4.8.5.

	libcpp/:
	PR preprocessor/103355
	* system.h (ATTR_LIKELY): Fix definition.

diff --git a/libcpp/system.h b/libcpp/system.h
index f6fc583ab806afe8edf93df2bb9d9b2f5c4f2c71..b78ab813d2fca33977790e33ef8f1289ba97448c 100644 (file)
--- a/libcpp/system.h
+++ b/libcpp/system.h
@@ -430,6 +430,8 @@ extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 # else
 #  define ATTR_LIKELY
 # endif
+#else
+# define ATTR_LIKELY
 #endif
 
 /* Poison identifiers we do not want to use.  */