From 0d451ee3891d87268322dc3b72b487fdd2fbade6 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 15 Sep 2014 08:15:04 +0100
Subject: [PATCH] configure: Require the presence of xorg/glamor.h for
 --enable-glamor

Check that we have the required Xorg headers for glamor if the user
requests --enable-glamor. There is a possiblity that the headers
mismatch as they don't have internal versioning, but this should catch
the majority of errors early on.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 configure.ac | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index 0191bd5c..8b34c773 100644
--- a/configure.ac
+++ b/configure.ac
@@ -424,6 +424,9 @@ if test "x$UXA" != "xno"; then
 	UXA=yes
 fi
 
+PKG_CHECK_MODULES(XORG, [xorg-server >= $required_xorg_server_version xproto fontsproto pixman-1 >= $required_pixman_version $REQUIRED_MODULES])
+ABI_VERSION=`$PKG_CONFIG --variable=abi_videodrv xorg-server`
+
 AC_ARG_ENABLE(glamor,
 	      AS_HELP_STRING([--enable-glamor],
 			     [Enable glamor, a new GL-based acceleration [default=no]]),
@@ -434,7 +437,13 @@ if test "x$GLAMOR" != "xno"; then
 		AC_MSG_ERROR([Glamor acceleration requested but UXA is not enabled])
 	fi
 	if pkg-config --exists "xorg-server >= 1.15.99.901"; then
-		GLAMOR="yes (using Xorg glamor module)"
+		save_CPPFLAGS=$CPPFLAGS
+		CPPFLAGS="$XORG_CFLAGS"
+		AC_CHECK_HEADER([glamor.h],
+				[GLAMOR="yes (using Xorg glamor module)"],
+				[test "x$GLAMOR" != "xauto" && AC_MSG_ERROR("failed to find required Xorg headers for glamor")
+				GLAMOR="no"], [#include <xorg-server.h>])
+		CPPFLAGS=$save_CPPFLAGS
 	else
 		PKG_CHECK_MODULES(LIBGLAMOR, [glamor >= 0.6.0])
 		PKG_CHECK_MODULES(LIBGLAMOR_EGL, [glamor-egl])
@@ -443,9 +452,6 @@ if test "x$GLAMOR" != "xno"; then
 	AC_DEFINE(USE_GLAMOR, 1, [Enable glamor acceleration])
 fi
 
-PKG_CHECK_MODULES(XORG, [xorg-server >= $required_xorg_server_version xproto fontsproto pixman-1 >= $required_pixman_version $REQUIRED_MODULES])
-ABI_VERSION=`$PKG_CONFIG --variable=abi_videodrv xorg-server`
-
 if test "x$ONLY_UMS" = "xyes"; then
 	UMS="yes"
 	KMS="no"