xserver-xorg: rewrite xorg-server.m4 patch

Instead of having a patch that upstream won't accept, rewrite it in a
upstreamable way and <gasp> submit it upstream.

The fundamental problem is that pkg-config --variable=sdkdir will return the
value of sdkdir literally, whereas --cflags will return -I${sdkdir} *but* will
do sysroot relocation magic on the path so it is usable.

(From OE-Core rev: 4af34cb1193fe86b862566becfb560b3d19155f4)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/xorg-xserver/xserver-xorg.inc

@@ -17,7 +17,6 @@ INC_PR = "r8"
 
 XORG_PN = "xorg-server"
 SRC_URI = "${XORG_MIRROR}/individual/xserver/${XORG_PN}-${PV}.tar.bz2"
-SRC_URI += "file://macro_tweak.patch"
 
 S = "${WORKDIR}/${XORG_PN}-${PV}"
 

meta/recipes-graphics/xorg-xserver/xserver-xorg/macro_tweak.patch

@@ -1,25 +0,0 @@
-This is the revised version of files/macro_tweak.patch for
-xorg-server 1.8.99.904 and newer.
-
-Upstream-Status: Pending
-
-Signed-off-by: Yu Ke <ke.yu@intel.com>
-
-Index: xorg-server-1.19.6/xorg-server.m4
-===================================================================
---- xorg-server-1.19.6.orig/xorg-server.m4
-+++ xorg-server-1.19.6/xorg-server.m4
-@@ -28,10 +28,12 @@ dnl
- # Checks for the MACRO define in xorg-server.h (from the sdk).  If it
- # is defined, then add the given PROTO to $REQUIRED_MODULES.
- 
-+m4_pattern_allow(PKG_CONFIG_SYSROOT_DIR)
-+
- AC_DEFUN([XORG_DRIVER_CHECK_EXT],[
- 	AC_REQUIRE([PKG_PROG_PKG_CONFIG])
- 	SAVE_CFLAGS="$CFLAGS"
--	CFLAGS="$CFLAGS -I`$PKG_CONFIG --variable=sdkdir xorg-server`"
-+	CFLAGS="$CFLAGS -I$PKG_CONFIG_SYSROOT_DIR`$PKG_CONFIG --variable=sdkdir xorg-server`"
- 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
- #include "xorg-server.h"
- #if !defined $1

meta/recipes-graphics/xorg-xserver/xserver-xorg/pkgconfig.patch

@@ -0,0 +1,34 @@
+Upstream-Status: Submitted [https://gitlab.freedesktop.org/xorg/xserver/merge_requests/22]
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+From 5f65a6246fe752764045dd1e38912f1dccec71e4 Mon Sep 17 00:00:00 2001
+From: Ross Burton <ross.burton@intel.com>
+Date: Thu, 20 Sep 2018 20:12:24 +0100
+Subject: [PATCH] xorg-server.m4: just all cflags instead of just sdkdir
+
+Instead of fetching just the sdkdir variable of xorg-server using pkg-config,
+simply get all of the CFLAGS.  Aside from completeness, this helps builds in
+sysroots as pkg-config knows what to do with --cflags but doesn't remap
+arbitrary variables.
+
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+---
+ xorg-server.m4 | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/xorg-server.m4 b/xorg-server.m4
+index 18255b91a..195bda5d8 100644
+--- a/xorg-server.m4
++++ b/xorg-server.m4
+@@ -31,7 +31,7 @@ dnl
+ AC_DEFUN([XORG_DRIVER_CHECK_EXT],[
+ 	AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+ 	SAVE_CFLAGS="$CFLAGS"
+-	CFLAGS="$CFLAGS -I`$PKG_CONFIG --variable=sdkdir xorg-server`"
++	CFLAGS="$CFLAGS `$PKG_CONFIG --cflags xorg-server`"
+ 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ #include "xorg-server.h"
+ #if !defined $1
+-- 
+2.11.0
+

meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.1.bb

@@ -2,6 +2,7 @@ require xserver-xorg.inc
 
 SRC_URI += "file://musl-arm-inb-outb.patch \
             file://0001-xf86pciBus.c-use-Intel-ddx-only-for-pre-gen4-hardwar.patch \
+            file://pkgconfig.patch \
             "
 SRC_URI[md5sum] = "e525846d1d0af5732ba835f2e2ec066d"
 SRC_URI[sha256sum] = "59c99fe86fe75b8164c6567bfc6e982aecc2e4a51e6fbac1b842d5d00549e918"