From 1f7e8d4253cf5265cba5a8968fb43fa720dde934 Mon Sep 17 00:00:00 2001
From: Jean-Philippe Andre <jp.andre@samsung.com>
Date: Mon, 11 Jan 2016 13:47:41 +0900
Subject: [PATCH] configure: Fail if opengl=full is used with EGL

So many problems from people who customize their builds in this
incompatible manner.

There really should be only one configure option as we don't
support opengl+egl (although possible in theory) or gles without
egl. Keeping both to not break existing builds.
---
 configure.ac | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 35c166b6d8..5e4865ee4a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1636,7 +1636,7 @@ if test "${want_sdl}" = "yes"; then
    EFL_PKG_CHECK_STRICT([sdl2 >= 2.0.0])
 fi
 
-# We only enable SDL with opengl if it is not the full version and not ES
+# We only enable SDL with opengl if it is the full version and not ES
 # This can be changed if we ported our SDL code over to SDL 2.0. For older
 # versions the SDL_opengles.h has never been released.
 want_gl_sdl="no"
@@ -1829,6 +1829,14 @@ AC_ARG_ENABLE([egl],
    ],
    [want_egl="no"])
 
+# Verify OpenGL + EGL modes match (full+glx or es+egl)
+if test "x${want_egl}" = "xyes" && test "x${with_opengl}" != "xes" ; then
+  AC_MSG_ERROR([Full OpenGL with EGL is not supported, please add --with-opengl=es to your configure options to switch to EGL + OpenGL ES.])
+fi
+if test "x${want_egl}" = "xno" && test "x${with_opengl}" = "xes" ; then
+  AC_MSG_ERROR([OpenGL ES requires EGL, please add --enable-egl to your configure options to switch to EGL + OpenGL ES.])
+fi
+
 # Pixman
 AC_ARG_ENABLE([pixman],
    [AS_HELP_STRING([--enable-pixman],[enable pixman for software rendering. @<:@default=disabled@:>@])],
@@ -5247,6 +5255,12 @@ else
    osname="${host_os}"
 fi
 
+if test "x${want_egl}" = "xyes" ; then
+   opengl_egl="(EGL)"
+else
+   opengl_egl=""
+fi
+
 echo "Configuration...: ${COLOR_OTHER}profile=${build_profile} os=${osname}${COLOR_RESET}"
 echo "  EFL API Set...: ${efl_api}"
 echo "  CPU Extensions: ${host_cpu} (${features_cpu})"
@@ -5254,7 +5268,7 @@ echo "  System Feature: ${features_system}"
 echo "  Threads.......: ${efl_have_threads} (${features_thread})"
 echo "  Cryptography..: ${build_crypto}"
 echo "  X11...........: ${with_x11}"
-echo "  OpenGL........: ${with_opengl}"
+echo "  OpenGL........: ${with_opengl} ${opengl_egl}"
 echo "  C++11.........: ${have_cxx11}"
 echo "  JavaScript....: ${want_js}"
 echo "  JavaScript flg: $EINA_JS_LIBS"