--- /dev/null
+This makes it possible to build the demos against opengl
+implementations other than Mesa
+
+Signed-off-by: Spenser Gilliland <spenser@gillilanding.com>
+---
+Index: mesa3d-demos-8.1.0/src/egl/eglut/eglut.c
+===================================================================
+--- mesa3d-demos-8.1.0.orig/src/egl/eglut/eglut.c
++++ mesa3d-demos-8.1.0/src/egl/eglut/eglut.c
+@@ -76,8 +76,9 @@ _eglutNow(void)
+ static void
+ _eglutDestroyWindow(struct eglut_window *win)
+ {
+- if (_eglut->surface_type != EGL_PBUFFER_BIT &&
+- _eglut->surface_type != EGL_SCREEN_BIT_MESA)
++
++ if (_eglut->surface_type == EGL_WINDOW_BIT ||
++ _eglut->surface_type == EGL_PIXMAP_BIT)
+ eglDestroySurface(_eglut->dpy, win->surface);
+
+ _eglutNativeFiniWindow(win);
+@@ -175,7 +176,9 @@ _eglutCreateWindow(const char *title, in
+ win->config, win->native.u.pixmap, NULL);
+ break;
+ case EGL_PBUFFER_BIT:
++#ifdef EGL_MESA_screen_surface
+ case EGL_SCREEN_BIT_MESA:
++#endif
+ win->surface = win->native.u.surface;
+ break;
+ default:
+@@ -289,8 +292,10 @@ eglutDestroyWindow(int win)
+ if (window->index != win)
+ return;
+
++#ifdef EGL_MESA_screen_surface
+ /* XXX it causes some bug in st/egl KMS backend */
+ if ( _eglut->surface_type != EGL_SCREEN_BIT_MESA)
++#endif
+ eglMakeCurrent(_eglut->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+
+ _eglutDestroyWindow(_eglut->current);
+Index: mesa3d-demos-8.1.0/src/egl/eglut/eglut_screen.c
+===================================================================
+--- mesa3d-demos-8.1.0.orig/src/egl/eglut/eglut_screen.c
++++ mesa3d-demos-8.1.0/src/egl/eglut/eglut_screen.c
+@@ -35,26 +35,33 @@
+
+ #define MAX_MODES 100
+
++#ifdef EGL_MESA_screen_surface
+ static EGLScreenMESA kms_screen;
+ static EGLModeMESA kms_mode;
+ static EGLint kms_width, kms_height;
++#endif
+
+ void
+ _eglutNativeInitDisplay(void)
+ {
++#ifdef EGL_MESA_screen_surface
+ _eglut->native_dpy = EGL_DEFAULT_DISPLAY;
+ _eglut->surface_type = EGL_SCREEN_BIT_MESA;
++#endif
+ }
+
+ void
+ _eglutNativeFiniDisplay(void)
+ {
++#ifdef EGL_MESA_screen_surface
+ kms_screen = 0;
+ kms_mode = 0;
+ kms_width = 0;
+ kms_height = 0;
++#endif
+ }
+
++#ifdef EGL_MESA_screen_surface
+ static void
+ init_kms(void)
+ {
+@@ -94,19 +101,23 @@ init_kms(void)
+ kms_width = width;
+ kms_height = height;
+ }
++#endif
+
+ void
+ _eglutNativeInitWindow(struct eglut_window *win, const char *title,
+ int x, int y, int w, int h)
+ {
++#ifdef EGL_MESA_screen_surface
+ EGLint surf_attribs[16];
+ EGLint i;
++#endif
+ const char *exts;
+
+ exts = eglQueryString(_eglut->dpy, EGL_EXTENSIONS);
+ if (!exts || !strstr(exts, "EGL_MESA_screen_surface"))
+ _eglutFatal("EGL_MESA_screen_surface is not supported\n");
+
++#ifdef EGL_MESA_screen_surface
+ init_kms();
+
+ i = 0;
+@@ -128,14 +139,17 @@ _eglutNativeInitWindow(struct eglut_wind
+
+ win->native.width = kms_width;
+ win->native.height = kms_height;
++#endif
+ }
+
+ void
+ _eglutNativeFiniWindow(struct eglut_window *win)
+ {
++#ifdef EGL_MESA_screen_surface
+ eglShowScreenSurfaceMESA(_eglut->dpy,
+ kms_screen, EGL_NO_SURFACE, 0);
+ eglDestroySurface(_eglut->dpy, win->native.u.surface);
++#endif
+ }
+
+ void
+Index: mesa3d-demos-8.1.0/src/egl/opengl/demo1.c
+===================================================================
+--- mesa3d-demos-8.1.0.orig/src/egl/opengl/demo1.c
++++ mesa3d-demos-8.1.0/src/egl/opengl/demo1.c
+@@ -18,6 +18,7 @@
+ static void
+ TestScreens(EGLDisplay dpy)
+ {
++#ifdef EGL_MESA_screen_surface
+ #define MAX 8
+ EGLScreenMESA screens[MAX];
+ EGLint numScreens;
+@@ -28,6 +29,7 @@ TestScreens(EGLDisplay dpy)
+ for (i = 0; i < numScreens; i++) {
+ printf(" Screen %d handle: %d\n", i, (int) screens[i]);
+ }
++#endif
+ }
+
+ /**
+Index: mesa3d-demos-8.1.0/src/egl/opengl/demo2.c
+===================================================================
+--- mesa3d-demos-8.1.0.orig/src/egl/opengl/demo2.c
++++ mesa3d-demos-8.1.0/src/egl/opengl/demo2.c
+@@ -16,6 +16,7 @@
+
+ /*#define FRONTBUFFER*/
+
++#ifdef EGL_MESA_screen_surface
+ static void _subset_Rectf(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2,
+ GLfloat r, GLfloat g, GLfloat b)
+ {
+@@ -95,12 +96,13 @@ TestScreens(EGLDisplay dpy)
+ printf(" Screen %d handle: %d\n", i, (int) screens[i]);
+ }
+ }
+-
++#endif
+
+ int
+ main(int argc, char *argv[])
+ {
+ int maj, min;
++#ifdef EGL_MESA_screen_surface
+ EGLContext ctx;
+ EGLSurface pbuffer, screen_surf;
+ EGLConfig configs[10];
+@@ -115,6 +117,7 @@ main(int argc, char *argv[])
+ EGLModeMESA mode;
+ EGLScreenMESA screen;
+ EGLint count;
++#endif
+
+ EGLDisplay d = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+ assert(d);
+@@ -132,6 +135,7 @@ main(int argc, char *argv[])
+ exit(1);
+ }
+
++#ifdef EGL_MESA_screen_surface
+ eglGetConfigs(d, configs, 10, &numConfigs);
+ printf("Got %d EGL configs:\n", numConfigs);
+ for (i = 0; i < numConfigs; i++) {
+@@ -211,6 +215,7 @@ main(int argc, char *argv[])
+ eglDestroySurface(d, pbuffer);
+ eglDestroyContext(d, ctx);
+ eglTerminate(d);
++#endif
+
+ return 0;
+ }
+Index: mesa3d-demos-8.1.0/src/egl/opengl/demo3.c
+===================================================================
+--- mesa3d-demos-8.1.0.orig/src/egl/opengl/demo3.c
++++ mesa3d-demos-8.1.0/src/egl/opengl/demo3.c
+@@ -46,7 +46,7 @@ GLubyte OpenGL_bits[] = {
+ 0x3e, 0x00, 0x00, 0xf8, 0x0c, 0x00,
+ };
+
+-
++#ifdef EGL_MESA_screen_surface
+ static void Init(void)
+ {
+
+@@ -551,11 +551,13 @@ write_ppm(const char *filename, const GL
+ fclose(f);
+ }
+ }
++#endif
+
+ int
+ main(int argc, char *argv[])
+ {
+ int maj, min;
++#ifdef EGL_MESA_screen_surface
+ EGLContext ctx;
+ EGLSurface screen_surf;
+ EGLConfig configs[10];
+@@ -566,6 +568,7 @@ main(int argc, char *argv[])
+ const GLubyte *bitmap;
+ EGLint screenAttribs[32];
+ EGLint i;
++#endif
+
+ EGLDisplay d = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+ assert(d);
+@@ -583,6 +586,7 @@ main(int argc, char *argv[])
+ exit(1);
+ }
+
++#ifdef EGL_MESA_screen_surface
+ eglGetConfigs(d, configs, 10, &numConfigs);
+ eglGetScreensMESA(d, &screen, 1, &count);
+ eglGetModesMESA(d, screen, &mode, 1, &count);
+@@ -642,6 +646,7 @@ main(int argc, char *argv[])
+ eglDestroySurface(d, screen_surf);
+ eglDestroyContext(d, ctx);
+ eglTerminate(d);
++#endif
+
+ return 0;
+ }
--- /dev/null
+This patches makes opengl an optional component.
+
+Signed-off-by: Spenser Gilliland <spenser@gillilanding.com>
+---
+Index: mesa3d-demos-8.1.0/configure.ac
+===================================================================
+--- mesa3d-demos-8.1.0.orig/configure.ac
++++ mesa3d-demos-8.1.0/configure.ac
+@@ -51,6 +51,14 @@ m4_ifndef([PKG_PROG_PKG_CONFIG],
+ ACLOCAL="aclocal -I/other/macro/dir" before running autoreconf.])])
+ PKG_PROG_PKG_CONFIG()
+
++AC_ARG_ENABLE([gl],
++ [AS_HELP_STRING([--enable-gl],
++ [enable GL library @<:@default=no@:>@])],
++ [gl_enabled="$enableval"],
++ [gl_enabled=auto])
++
++if test "x$gl_enabled" != "xno"; then
++
+ dnl Get the pkg-config definitions for libGL. We include a fallback
+ dnl path for GL implementation that don't provide a .pc file
+ PKG_CHECK_MODULES(GL, [gl], [], [
+@@ -103,6 +111,8 @@ PKG_CHECK_MODULES(GLU, [glu], [],
+ DEMO_CFLAGS="$DEMO_CFLAGS $GLU_CFLAGS"
+ DEMO_LIBS="$DEMO_LIBS $GLU_LIBS"
+
++fi
++
+ AC_ARG_ENABLE([egl],
+ [AS_HELP_STRING([--enable-egl],
+ [enable EGL library @<:@default=no@:>@])],
+@@ -287,7 +297,7 @@ AC_SUBST([MESA_GLAPI])
+ AC_SUBST([WAYLAND_CFLAGS])
+ AC_SUBST([WAYLAND_LIBS])
+
+-
++AM_CONDITIONAL(HAVE_GL, test "x$gl_enabled" = "xyes")
+ AM_CONDITIONAL(HAVE_EGL, test "x$egl_enabled" = "xyes")
+ AM_CONDITIONAL(HAVE_GLESV1, test "x$glesv1_enabled" = "xyes")
+ AM_CONDITIONAL(HAVE_GLESV2, test "x$glesv2_enabled" = "xyes")
+Index: mesa3d-demos-8.1.0/src/egl/opengl/Makefile.am
+===================================================================
+--- mesa3d-demos-8.1.0.orig/src/egl/opengl/Makefile.am
++++ mesa3d-demos-8.1.0/src/egl/opengl/Makefile.am
+@@ -50,6 +50,7 @@ endif
+ endif
+
+ if HAVE_EGL
++if HAVE_GL
+ noinst_PROGRAMS = \
+ demo1 \
+ demo2 \
+@@ -61,6 +62,7 @@ noinst_PROGRAMS = \
+ $(EGL_DRM_DEMOS) \
+ $(EGL_X11_DEMOS)
+ endif
++endif
+
+ egltri_screen_SOURCES = egltri.c
+ eglgears_screen_SOURCES = eglgears.c
+Index: mesa3d-demos-8.1.0/src/util/Makefile.am
+===================================================================
+--- mesa3d-demos-8.1.0.orig/src/util/Makefile.am
++++ mesa3d-demos-8.1.0/src/util/Makefile.am
+@@ -27,7 +27,9 @@ AM_CFLAGS = \
+ AM_LDFLAGS = \
+ $(DEMO_LIBS)
+
++if HAVE_GL
+ noinst_LTLIBRARIES = libutil.la
++endif
+
+ if HAVE_GLUT
+ AM_CFLAGS += \
--- /dev/null
+################################################################################
+#
+# mesa3d-demos
+#
+################################################################################
+
+MESA3D_DEMOS_VERSION = 8.2.0
+MESA3D_DEMOS_SOURCE = mesa-demos-$(MESA3D_DEMOS_VERSION).tar.bz2
+MESA3D_DEMOS_SITE = ftp://ftp.freedesktop.org/pub/mesa/demos/$(MESA3D_DEMOS_VERSION)
+MESA3D_DEMOS_AUTORECONF = YES
+MESA3D_DEMOS_DEPENDENCIES = host-pkgconf
+MESA3D_DEMOS_LICENSE = MIT
+
+ifeq ($(BR2_PACKAGE_HAS_LIBGL),y)
+MESA3D_DEMOS_DEPENDENCIES += libgl libglew libglu
+MESA3D_DEMOS_CONF_OPTS += --enable-gl
+else
+MESA3D_DEMOS_CONF_OPTS += --disable-gl
+endif
+
+ifeq ($(BR2_PACKAGE_HAS_LIBEGL),y)
+MESA3D_DEMOS_DEPENDENCIES += libegl
+MESA3D_DEMOS_CONF_OPTS += --enable-egl
+else
+MESA3D_DEMOS_CONF_OPTS += --disable-egl
+endif
+
+ifeq ($(BR2_PACKAGE_HAS_LIBGLES),y)
+MESA3D_DEMOS_DEPENDENCIES += libgles
+MESA3D_DEMOS_CONF_OPTS += --enable-gles1 --enable-gles2
+else
+MESA3D_DEMOS_CONF_OPTS += --disable-gles1 --disable-gles2
+endif
+
+ifeq ($(BR2_PACKAGE_HAS_LIBOPENVG),y)
+MESA3D_DEMOS_DEPENDENCIES += libopenvg
+MESA3D_DEMOS_CONF_OPTS += --enable-vg
+else
+MESA3D_DEMOS_CONF_OPTS += --disable-vg
+endif
+
+ifeq ($(BR2_PACKAGE_MESA3D_OPENGL_EGL),y)
+MESA3D_DEMOS_DEPENDENCIES += mesa3d
+MESA3D_DEMOS_CONF_OPTS += --enable-gbm
+else
+MESA3D_DEMOS_CONF_OPTS += --disable-gbm
+endif
+
+ifeq ($(BR2_PACKAGE_FREETYPE),y)
+MESA3D_DEMOS_DEPENDENCIES += freetype
+MESA3D_DEMOS_CONF_OPTS += --enable-freetype2
+else
+MESA3D_DEMOS_CONF_OPTS += --disable-freetype2
+endif
+
+ifeq ($(BR2_PACKAGE_WAYLAND),y)
+MESA3D_DEMOS_DEPENDENCIES += wayland
+MESA3D_DEMOS_CONF_OPTS += --enable-wayland
+else
+MESA3D_DEMOS_CONF_OPTS += --disable-wayland
+endif
+
+$(eval $(autotools-package))
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