buildroot/package/sdl2_ttf/0001-fix-opengl-detection.patch

# HG changeset patch
# User Sam Lantinga <slouken@libsdl.org>
# Date 1485568474 28800
# Node ID 3b93536d291a34183592fd29ef1df9cf1416ac09
# Parent  184c34c673d479477d34194e3c0b1abe7ca5d828
Make sure we can link with OpenGL libraries in the OpenGL configure test

[yann.morin.1998@free.fr:
  - backported from upstream
  - drop the configure hunk for autoreconf
]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

diff -r 184c34c673d4 -r 3b93536d291a configure.in
--- a/configure.in	Sun Jan 01 18:46:38 2017 -0800
+++ b/configure.in	Fri Jan 27 17:54:34 2017 -0800
@@ -164,14 +164,17 @@
 esac
 AC_MSG_CHECKING(for OpenGL support)
 have_opengl=no
-AC_TRY_COMPILE([
+save_LIBS="$LIBS"
+LIBS="$LIBS $SYS_GL_LIBS"
+AC_TRY_LINK([
  #include "SDL_opengl.h"
 ],[
- GLuint texture;
+ glOrtho( -2.0, 2.0, -2.0, 2.0, -20.0, 20.0 );
 ],[
 have_opengl=yes
 ])
 AC_MSG_RESULT($have_opengl)
+LIBS="$save_LIBS"
 if test x$have_opengl = xyes; then
     CFLAGS="$CFLAGS -DHAVE_OPENGL"
     GL_LIBS="$SYS_GL_LIBS"