From 5a6675a2963f36c758529c3560fe5b168ca5115c Mon Sep 17 00:00:00 2001
From: Keegan McAllister <kmcallister@mozilla.com>
Date: Fri, 28 Feb 2014 13:09:43 -0800
Subject: [PATCH] Work around missing expat.pc on some RedHat-based systems

---
 configure | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/configure b/configure
index 0011fbab8b8..5a72c10a13d 100755
--- a/configure
+++ b/configure
@@ -687,6 +687,11 @@ do
             CONFIGURE_ARGS="${CONFIGURE_ARGS} --sysconfdir=/etc"
             CONFIGURE_ARGS="${CONFIGURE_ARGS} --localstatedir=/var"
             CONFIGURE_ARGS="${CONFIGURE_ARGS} --disable-shared" # work around Rust #12557
+            if [ -f /etc/redhat-release ]; then
+                # Some RedHat-based distros (including our CentOS 6 build machines) are missing
+                # pkg-config files for expat: https://bugzilla.redhat.com/show_bug.cgi?id=833338
+                CONFIGURE_ARGS="${CONFIGURE_ARGS} --with-expat=/usr"
+            fi
             CONFIGURE_ARGS="${CONFIGURE_ARGS} ${EXTRA_CONFIGURE_ARGS}"
             ;;
         platform/android/fontconfig)