glew: Fix build errors at recipes depending on glew

Glew headers override mesa headers by setting mesa's include guards. This
stopped working since mesa renamed them.

Fixes errors like this in depending recipes:

| <...>/recipe-sysroot/usr/include/GL/glext.h:12066:105: error: conflicting declaration 'typedef void (* PFNGLFRAGMENTLIGHTFVSGIXPROC)(GLenum, GLenum, const GLfloat*)'
|  typedef void (APIENTRYP PFNGLFRAGMENTLIGHTFVSGIXPROC) (GLenum light, GLenum pname, const GLfloat *params);
|                                                                                                          ^

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 75 insertions, 1 deletions

diff --git a/meta/recipes-graphics/glew/glew/0001-Fixed-compilation-with-current-mesa-versions.patch b/meta/recipes-graphics/glew/glew/0001-Fixed-compilation-with-current-mesa-versions.patch
new file mode 100644
index 0000000000..64f3e2fd9b
--- /dev/null
+++ b/meta/recipes-graphics/glew/glew/0001-Fixed-compilation-with-current-mesa-versions.patch
@@ -0,0 +1,73 @@
+From 7f65a36866f4e24dd1446fe1c9d21424f28bcabd Mon Sep 17 00:00:00 2001
+From: Deve <deveee@gmail.com>
+Date: Wed, 14 Nov 2018 21:07:29 +0100
+Subject: [PATCH] Fixed compilation with current mesa versions.
+
+As you can see in
+https://cgit.freedesktop.org/mesa/mesa/tree/include/GL/glext.h
+now the file uses __gl_glext_h_ instead of __glext_h_
+It's precisely caused by commit f7d42ee7d319256608ad60778f6787c140badada
+
+Backoprt notes: 
+
+* The original patch adjusts auto/src/glew_head.h only
+* include/GL/glew.h is not part of git repo and gets created on tarball
+  creation
+
+=> patch include/GL/glew.h either to cause the desired fix
+
+Upstream-Status: Backport [1]
+
+[1] https://github.com/nigels-com/glew/commit/7f65a36866f4e24dd1446fe1c9d21424f28bcabd
+
+Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
+---
+ auto/src/glew_head.h | 3 ++-
+ include/GL/glew.h    | 3 ++-
+ 2 files changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/auto/src/glew_head.h b/auto/src/glew_head.h
+index c19cefb..8f313d9 100644
+--- a/auto/src/glew_head.h
++++ b/auto/src/glew_head.h
+@@ -14,7 +14,7 @@
+ #if defined(__REGAL_H__)
+ #error Regal.h included before glew.h
+ #endif
+-#if defined(__glext_h_) || defined(__GLEXT_H_)
++#if defined(__glext_h_) || defined(__GLEXT_H_) || defined(__gl_glext_h_)
+ #error glext.h included before glew.h
+ #endif
+ #if defined(__gl_ATI_h_)
+@@ -30,6 +30,7 @@
+ #define __X_GL_H
+ #define __glext_h_
+ #define __GLEXT_H_
++#define __gl_glext_h_
+ #define __gl_ATI_h_
+ 
+ #if defined(_WIN32)
+diff --git a/include/GL/glew.h b/include/GL/glew.h
+index b5b6987..a9f9e4b 100644
+--- a/include/GL/glew.h
++++ b/include/GL/glew.h
+@@ -93,7 +93,7 @@
+ #if defined(__REGAL_H__)
+ #error Regal.h included before glew.h
+ #endif
+-#if defined(__glext_h_) || defined(__GLEXT_H_)
++#if defined(__glext_h_) || defined(__GLEXT_H_) || defined(__gl_glext_h_)
+ #error glext.h included before glew.h
+ #endif
+ #if defined(__gl_ATI_h_)
+@@ -109,6 +109,7 @@
+ #define __X_GL_H
+ #define __glext_h_
+ #define __GLEXT_H_
++#define __gl_glext_h_
+ #define __gl_ATI_h_
+ 
+ #if defined(_WIN32)
+-- 
+2.20.1
+
diff --git a/meta/recipes-graphics/glew/glew_2.1.0.bb b/meta/recipes-graphics/glew/glew_2.1.0.bb
index be725e0530..18e6909aa7 100644
--- a/meta/recipes-graphics/glew/glew_2.1.0.bb
+++ b/meta/recipes-graphics/glew/glew_2.1.0.bb
@@ -6,7 +6,8 @@ LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=2ac251558de685c6b9478d89be3149c2"
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/project/glew/glew/${PV}/glew-${PV}.tgz \
-           file://no-strip.patch"
+           file://no-strip.patch \
+           file://0001-Fixed-compilation-with-current-mesa-versions.patch"
 
 SRC_URI[md5sum] = "b2ab12331033ddfaa50dc39345343980"
 SRC_URI[sha256sum] = "04de91e7e6763039bc11940095cd9c7f880baba82196a7765f727ac05a993c95"