From 87c9c18fad02744238336a6cf1ce70d3ec2c89c2 Mon Sep 17 00:00:00 2001
From: Bernd Kuhls <bernd.kuhls@t-online.de>
Date: Sat, 11 Jun 2016 17:03:07 +0200
Subject: [PATCH 1/1] OpenGL/EGL: Avoid X11 header collision

Including X11 headers via EGL/egl.h leads to a collision of defines
between Qt and X11. To fix this qt5 added
  DEFINES += MESA_EGL_NO_X11_HEADERS
in various files:

https://github.com/qtproject/qtbase/blob/dev/src/platformsupport/eglconvenience/eglconvenience.pri#L19
https://github.com/qtproject/qtbase/blob/dev/src/plugins/platforms/minimalegl/minimalegl.pro#L10
https://github.com/qtproject/qtbase/blob/dev/src/plugins/platforms/eglfs/deviceintegration/eglfs_x11/eglfs_x11.pro#L6
[...]

This patch fixes a similar compile error in qt4:
http://autobuild.buildroot.net/results/9b0/9b0ed92984eead89d148eaa71aff6e2f1e117837/
http://autobuild.buildroot.org/results/4fd/4fd57553336d36439fab32a7221fc8639758e887/
http://autobuild.buildroot.org/results/5cb/5cb8072f8220f7203fa79936eedcc43eab53ec66/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
(patch not sent upstream because qt4 branch is closed:
 http://blog.qt.io/blog/2015/05/26/qt-4-8-7-released/)
---

 src/gui/egl/egl.pri   | 3 +++
 src/opengl/opengl.pro | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/src/gui/egl/egl.pri b/src/gui/egl/egl.pri
index 8e8664c..715ffd7 100644
--- a/src/gui/egl/egl.pri
+++ b/src/gui/egl/egl.pri
@@ -22,6 +22,9 @@ contains(QT_CONFIG, egl): {
             !isEmpty(QMAKE_LIBS_EGL): LIBS += $$QMAKE_LIBS_EGL
         }
 
+	# Avoid X11 header collision
+	DEFINES += MESA_EGL_NO_X11_HEADERS
+
 	wince*: SOURCES += egl/qegl_wince.cpp
 
 	unix {
diff --git a/src/opengl/opengl.pro b/src/opengl/opengl.pro
index ce1a5d2..65b1031 100644
--- a/src/opengl/opengl.pro
+++ b/src/opengl/opengl.pro
@@ -149,6 +149,9 @@ embedded {
                qglwindowsurface_qws_p.h \
                qgl_egl_p.h
 
+    # Avoid X11 header collision
+    DEFINES += MESA_EGL_NO_X11_HEADERS
+
     contains(QT_CONFIG, fontconfig) {
         include($$QT_SOURCE_TREE/config.tests/unix/freetype/freetype.pri)
     } else {
-- 
2.8.1