* gc.c: i686-linux needs to define _XOPEN_SOURCE 600 for posix_memalign.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34239 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Mon Jan  9 07:46:17 2012  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* gc.c: i686-linux needs to define _XOPEN_SOURCE 600 for posix_memalign.
+
 Mon Jan  9 04:24:59 2012  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* gc.c (rb_objspace_free): global_List is allocated with xmalloc.

gc.c

@@ -36,9 +36,11 @@
 
 #if defined _WIN32 || defined __CYGWIN__
 #include <windows.h>
-#endif
-
-#if !defined(__MINGW32__) && !defined(_WIN32) && !defined(__CYGWIN__) &&!defined(HAVE_POSIX_MEMALIGN) &&defined(HAVE_MEMALIGN)
+#elif defined(HAVE_POSIX_MEMALIGN)
+# ifdef __linux__ /* i386 linux needs #define _XOPEN_SOURCE 600 to use posix_memalign */
+#  define _XOPEN_SOURCE 600
+# endif
+#elif defined(HAVE_MEMALIGN)
 #include <malloc.h>
 #endif