X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=modules%2Fstdarg;h=48febb28db7db943dd92b8e9f0ac3c411336985d;hb=a179a84eaad67c3690f924f4a0d6852d13b073d1;hp=01acff89a27014d8bdf8982b8368266ed5fddcb0;hpb=4f9bc0db18ebf839e7ad88b13d84655816b4b805;p=gnulib.git

diff --git a/modules/stdarg b/modules/stdarg
index 01acff89a..48febb28d 100644
--- a/modules/stdarg
+++ b/modules/stdarg
@@ -6,6 +6,13 @@ m4/stdarg.m4
 
 Depends-on:
 
+configure.ac-early:
+dnl Some compilers (e.g., AIX 5.3 cc) need to be in c99 mode
+dnl for the builtin va_copy to work.  With Autoconf 2.60 or later,
+dnl AC_PROG_CC_STDC arranges for this.  With older Autoconf AC_PROG_CC_STDC
+dnl shouldn't hurt, though installers are on their own to set c99 mode.
+AC_REQUIRE([AC_PROG_CC_STDC])
+
 configure.ac:
 gl_STDARG_H