From 9d84442409a283b9b0ce8b9db85523912530a9b2 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Wed, 11 Aug 2004 07:25:08 +0000
Subject: [PATCH] define the _XOPEN_SOURCE define in the config.h file instead,
 and also added a decent quote about the define, taken from
 http://www.opengroup.org/onlinepubs/007908799/xsh/compilation.html

---
 configure.ac | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 00633e242..9bd061a1e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -121,7 +121,17 @@ case $host in
   mips-sgi-irix*)
     if test "$GCC" != "yes"; then
       xopen="yes"
-      CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=500"
+
+      # "Applications should ensure that the feature test macro _XOPEN_SOURCE
+      # is defined with the value 500 before inclusion of any header. This is
+      # needed to enable the functionality described in this specification,
+      # and possibly to enable functionality defined elsewhere in the Common
+      # Applications Environment."
+
+      # So far, we've only detected this to be strictly necessary if not using
+      # gcc on SGI IRIX. And this only to avoid warnings.
+
+      AC_DEFINE(_XOPEN_SOURCE, 500, [ensure SUSV2 compatibility])
     fi
     ;;
   *)