refine #if condition introduced previously.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8@8700 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/defines.h b/defines.h
index 7b650c3a7..0e3c54758 100644
--- a/defines.h
+++ b/defines.h
@@ -226,7 +226,7 @@ flush_register_windows(void)
 #  define FLUSH_REGISTER_WINDOWS flush_register_windows()
 #elif defined(__ia64__)
 void flush_register_windows(void)
-#  if ( __GNUC__ == 3 && __GNUC_MINOR__ > 0 ) || __GNUC__ > 3
+#  if defined(__GNUC__) && (( __GNUC__ == 3 && __GNUC_MINOR__ > 0 ) || __GNUC__ > 3)
 __attribute__ ((noinline))
 #  endif
   ;