From bcecea6ea6c2727e4071f5a43fab49673573e905 Mon Sep 17 00:00:00 2001
From: Kristian Høgsberg <krh@redhat.com>
Date: Mon, 25 Feb 2008 18:50:26 -0500
Subject: autoconf: Add gcc search patch to MKDEP_OPTIONS to eliminate
 warnings.

Also, use -include to avoid error message when make initially fails to
include the non-existent depend file.
---
 configure.ac | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index a7707f8a8e..ec1bb8288e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,6 +30,15 @@ AC_PATH_PROG(MAKE, make)
 AC_PATH_PROG(MKDEP, makedepend)
 AC_PATH_PROG(SED, sed)
 
+dnl Ask gcc where it's keeping its secret headers
+if test "x$GCC" = xyes; then
+    GCC_PATH=$(gcc -print-search-dirs | sed -ne 's/install: //p')
+    MKDEP_OPTIONS="-fdepend -I${GCC_PATH}include"
+else
+    MKDEP_OPTIONS=-fdepend
+fi
+AC_SUBST(MKDEP_OPTIONS)
+
 dnl Make sure the pkg-config macros are defined
 m4_ifdef([PKG_PROG_PKG_CONFIG],,[
     AC_MSG_ERROR([The pkg-config autoconf macros are not defined.
-- 
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