libepoxy: make EGL support optional
This commit adds a patch to the libepoxy package to make the EGL support optional, which allows libepoxy to build with a pure OpenGL Mesa3D configuration (i.e without EGL/OpenGLES). Fixes: http://autobuild.buildroot.net/results/88774af2845e17cab021a72c8f3171fe30b3a1ff/ Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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package/libepoxy/0002-Make-EGL-support-optional.patch
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package/libepoxy/0002-Make-EGL-support-optional.patch
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From 0511fc56e7017209ad18d16551ccaad05de9486c Mon Sep 17 00:00:00 2001
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From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Date: Mon, 8 May 2017 23:12:49 +0200
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Subject: [PATCH] Make EGL support optional
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It is perfectly possible to build Mesa3D with just OpenGL support, and
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use with GLX in X.org, without having EGL/OpenGLES support.
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However, libepoxy currently unconditionally requires EGL support in its
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configure.ac, which causes a build failure when Mesa3D only provides
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full OpenGL support:
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checking for EGL... no
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configure: error: Package requirements (egl) were not met:
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Package egl was not found in the pkg-config search path.
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Perhaps you should add the directory containing `egl.pc'
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to the PKG_CONFIG_PATH environment variable
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Package 'egl', required by 'world', not found
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This commit fixes that by:
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- Adjusting the configure.ac to add a --{enable,disable}-egl option
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handled in the exact same way as --{enable,disable}-glx
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- Adjusting the meson build logic in the same way.
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- Adjusting src/dispatch_common.h to define PLATFORM_HAS_EGL correctly,
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which allows to not include any EGL related header file if EGL
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support is not enabled.
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Submitted-upstream: https://github.com/anholt/libepoxy/pull/123
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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---
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configure.ac | 33 ++++++++++++++++++++++++++++-----
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meson.build | 21 ++++++++++++++++++---
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meson_options.txt | 5 +++++
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src/dispatch_common.h | 8 ++++----
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4 files changed, 55 insertions(+), 12 deletions(-)
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diff --git a/configure.ac b/configure.ac
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index 31b0985..2dbecd9 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -88,11 +88,35 @@ AS_CASE([$enable_glx],
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[AC_MSG_ERROR([Invalid value "$enable_glx" for option "--enable-glx"])]
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])
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-# The remaining platform specific API for GL/GLES are enabled
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-# depending on the platform we're building for
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+AC_ARG_ENABLE([egl],
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+ [AC_HELP_STRING([--enable-egl=@<:@auto,yes,no@:>@], [Enable EGL support @<:@default=auto@:>@])],
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+ [enable_egl=$enableval],
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+ [enable_egl=auto])
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+
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+AS_CASE([$enable_egl],
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+ [auto], [
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+ AS_CASE([$host_os],
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+ [mingw*], [build_egl=no],
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+ [darwin*], [build_egl=no],
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+ [android*], [build_egl=no],
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+ [build_egl=yes])
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+ ],
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+
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+ [yes], [
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+ build_egl=yes
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+ ],
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+
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+ [no], [
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+ build_egl=no
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+ ],
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+
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+ [AC_MSG_ERROR([Invalid value "$enable_egl" for option "--enable-egl"])]
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+])
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+
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+# The remaining platform specific API are enabled depending on the
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+# platform we're building for
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AS_CASE([$host_os],
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[mingw*], [
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- build_egl=no
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build_wgl=yes
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has_znow=yes
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# On windows, the DLL has to have all of its functions
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@@ -108,7 +132,6 @@ AS_CASE([$host_os],
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],
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[darwin*], [
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- build_egl=no
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build_wgl=no
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build_apple=yes
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has_znow=no
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@@ -116,7 +139,6 @@ AS_CASE([$host_os],
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],
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[
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- build_egl=yes
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build_wgl=no
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has_znow=yes
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# On platforms with dlopen, we load everything dynamically and
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@@ -131,6 +153,7 @@ AM_CONDITIONAL(BUILD_EGL, test x$build_egl = xyes)
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if test x$build_egl = xyes; then
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PKG_CHECK_MODULES(EGL, [egl])
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AC_DEFINE([BUILD_EGL], [1], [build EGL tests])
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+ AC_DEFINE(ENABLE_EGL, [1], [Whether EGL support is enabled])
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fi
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AM_CONDITIONAL(BUILD_GLX, test x$build_glx = xyes)
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diff --git a/meson.build b/meson.build
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index 5435f45..226152e 100644
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--- a/meson.build
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+++ b/meson.build
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@@ -51,26 +51,41 @@ elif enable_glx == 'no'
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build_glx = false
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endif
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+enable_egl = get_option('enable-egl')
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+if enable_egl == 'auto'
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+ if host_system == 'windows'
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+ build_egl = false
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+ elif host_system == 'darwin'
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+ build_egl = false
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+ elif host_system == 'android'
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+ build_egl = false
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+ else
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+ build_egl = true
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+ endif
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+elif enable_egl == 'yes'
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+ build_egl = true
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+elif enable_egl == 'no'
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+ build_egl = false
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+endif
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+
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# The remaining platform specific API for GL/GLES are enabled
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# depending on the platform we're building for
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if host_system == 'windows'
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- build_egl = false
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build_apple = false
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build_wgl = true
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has_znow = true
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elif host_system == 'darwin'
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- build_egl = false
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build_apple = true
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build_wgl = false
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has_znow = false
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else
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- build_egl = true
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build_apple = false
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build_wgl = false
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has_znow = true
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endif
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conf.set10('ENABLE_GLX', build_glx)
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+conf.set10('ENABLE_EGL', build_egl)
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# Compiler flags, taken from the Xorg macros
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if cc.get_id() == 'msvc'
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diff --git a/meson_options.txt b/meson_options.txt
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index 18932f5..244476a 100644
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--- a/meson_options.txt
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+++ b/meson_options.txt
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@@ -6,3 +6,8 @@ option('enable-glx',
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choices: [ 'auto', 'yes', 'no' ],
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value: 'auto',
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description: 'Enable GLX support')
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+option('enable-egl',
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+ type: 'combo',
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+ choices: [ 'auto', 'yes', 'no' ],
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+ value: 'auto',
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+ description: 'Enable EGL support')
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diff --git a/src/dispatch_common.h b/src/dispatch_common.h
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index e3277f7..e16771f 100644
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--- a/src/dispatch_common.h
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+++ b/src/dispatch_common.h
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@@ -24,19 +24,19 @@
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#include "config.h"
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#ifdef _WIN32
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-#define PLATFORM_HAS_EGL 0
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+#define PLATFORM_HAS_EGL ENABLE_EGL
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#define PLATFORM_HAS_GLX ENABLE_GLX
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#define PLATFORM_HAS_WGL 1
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#elif defined(__APPLE__)
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-#define PLATFORM_HAS_EGL 0
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+#define PLATFORM_HAS_EGL ENABLE_EGL
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#define PLATFORM_HAS_GLX ENABLE_GLX
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#define PLATFORM_HAS_WGL 0
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#elif defined(ANDROID)
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-#define PLATFORM_HAS_EGL 1
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+#define PLATFORM_HAS_EGL ENABLE_EGL
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#define PLATFORM_HAS_GLX 0
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#define PLATFORM_HAS_WGL 0
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#else
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-#define PLATFORM_HAS_EGL 1
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+#define PLATFORM_HAS_EGL ENABLE_EGL
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#define PLATFORM_HAS_GLX ENABLE_GLX
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#define PLATFORM_HAS_WGL 0
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#endif
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--
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2.7.4
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@ -12,6 +12,8 @@ LIBEPOXY_INSTALL_STAGING = YES
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LIBEPOXY_DEPENDENCIES = host-pkgconf xutil_util-macros
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LIBEPOXY_LICENSE = MIT
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LIBEPOXY_LICENSE_FILES = COPYING
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# 0002-Make-EGL-support-optional.patch
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LIBEPOXY_AUTORECONF = YES
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ifeq ($(BR2_PACKAGE_HAS_LIBEGL),y)
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LIBEPOXY_CONF_OPTS += --enable-egl
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