[PATCH v2] glew: build for EGL in non-X11 distros

[Andre McCurdy <armccurdy@gmail.com>]

The glew 2.0.0 release added support for building for EGL:

  http://glew.sourceforge.net/log.html

Add PACKAGECONFIG options for 'opengl' (ie the previous default, with
dependencies on opengl and X11) and 'egl-gles2', which depends on EGL
and GLESv2 and allow glew to be built for non-X11 distros.

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
---
 meta/recipes-graphics/glew/glew_2.0.0.bb | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/meta/recipes-graphics/glew/glew_2.0.0.bb b/meta/recipes-graphics/glew/glew_2.0.0.bb
index 489dd7c..1c93ca0 100644
--- a/meta/recipes-graphics/glew/glew_2.0.0.bb
+++ b/meta/recipes-graphics/glew/glew_2.0.0.bb
@@ -2,12 +2,9 @@ SUMMARY = "OpenGL extension loading library"
 DESCRIPTION = "The OpenGL Extension Wrangler Library (GLEW) is a cross-platform open-source C/C++ extension loading library."
 HOMEPAGE = "http://glew.sourceforge.net/"
 BUGTRACKER = "http://sourceforge.net/tracker/?group_id=67586"
-SECTION = "x11"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=2ac251558de685c6b9478d89be3149c2"
 
-DEPENDS = "virtual/libx11 virtual/libgl libglu libxext libxi libxmu"
-
 SRC_URI = "${SOURCEFORGE_MIRROR}/project/glew/glew/${PV}/glew-${PV}.tgz \
            file://no-strip.patch"
 
@@ -19,12 +16,18 @@ UPSTREAM_CHECK_REGEX = "/glew/(?P<pver>(\d+[\.\-_]*)+)/"
 
 inherit lib_package pkgconfig distro_features_check
 
-REQUIRED_DISTRO_FEATURES = "x11"
+REQUIRED_DISTRO_FEATURES = "opengl"
+
+PACKAGECONFIG ?= "${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'opengl', 'egl-gles2', d)}"
+
+# The opengl and egl-XXX options are exclusive, enable only one.
+PACKAGECONFIG[opengl] = "SYSTEM='linux',,virtual/libx11 virtual/libgl libglu libxext libxi libxmu"
+PACKAGECONFIG[egl-gles2] = "SYSTEM='linux-egl' GLEW_NO_GLU='-DGLEW_NO_GLU' LDFLAGS.GL='-lEGL -lGLESv2',,virtual/egl virtual/libgles2"
 
-# Override SYSTEM to avoid calling config.guess, we're cross-compiling.  Pass
-# our CFLAGS via POPT as that's the optimisation variable and safely
-# overwritten.
-EXTRA_OEMAKE = "SYSTEM='linux' \
+# Override SYSTEM (via PACKAGECONFIG_CONFARGS) to avoid calling config.guess,
+# we're cross-compiling. Pass our CFLAGS via POPT as that's the optimisation
+# variable and safely overwritten.
+EXTRA_OEMAKE = "${PACKAGECONFIG_CONFARGS} \
                 CC='${CC}' LD='${CC}' STRIP='' \
                 LDFLAGS.EXTRA='${LDFLAGS}' \
                 POPT='${CFLAGS}' \
-- 
1.9.1