(main): Use defined(GNU_LINUX).

diff --git a/src/emacs.c b/src/emacs.c
index b84f137be8d767f7259fc88830ccc1c35eb53d7f..88ec48773167603d6982b43ff97c0b74d60ed4ff 100644 (file)
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -827,7 +827,7 @@ main (argc, argv
       heap_bss_diff = (char *)my_heap_start - max (my_endbss, my_endbss_static);
     }
 
-#if (GNU_LINUX) && __GNU_LIBRARY__ - 0 < 6
+#if defined(GNU_LINUX) && __GNU_LIBRARY__ - 0 < 6
   __sbrk (1);
 #endif