X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/f0451dba71a80adebe53a11db00c00bac7c70ba7..16c4a35041d6f9bd581134f99e3d6e915e48eb8b:/src/system.h

diff --git a/src/system.h b/src/system.h
index b8a73edb..93213cb7 100644
--- a/src/system.h
+++ b/src/system.h
@@ -79,6 +79,21 @@
 extern int errno;
 #endif
 
+/* AIX requires this to be the first thing in the file.  */
+#ifndef __GNUC__
+# if HAVE_ALLOCA_H
+#  include <alloca.h>
+# else
+#  ifdef _AIX
+ #pragma alloca
+#  else
+#   ifndef alloca /* predefined by HP cc +Olibcalls */
+char *alloca ();
+#   endif
+#  endif
+# endif
+#endif
+
 #if PROTOTYPES
 # define PARAMS(p) p
 #else