From bb0ffae7164d296d32da24fa5499534de259169a Mon Sep 17 00:00:00 2001
From: Spenser Gilliland <spenser@gillilanding.com>
Date: Sat, 24 Feb 2018 11:36:17 +0100
Subject: [PATCH] demos: makes opengl an optional component

Signed-off-by: Spenser Gilliland <spenser@gillilanding.com>
[Romain: convert to git patch, rebase on 8.4.0]
Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 configure.ac               | 12 +++++++++++-
 src/egl/opengl/Makefile.am |  2 ++
 src/util/Makefile.am       |  2 ++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 0b5e9a76..24298c44 100644
--- a/configure.ac
+++ b/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], [], [
@@ -112,6 +120,8 @@ 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=auto@:>@])],
@@ -302,7 +312,7 @@ 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")
diff --git a/src/egl/opengl/Makefile.am b/src/egl/opengl/Makefile.am
index 6d184ff6..219ab850 100644
--- a/src/egl/opengl/Makefile.am
+++ b/src/egl/opengl/Makefile.am
@@ -56,6 +56,7 @@ endif
 endif
 
 if HAVE_EGL
+if HAVE_GL
 bin_PROGRAMS = \
 	eglinfo
 noinst_PROGRAMS = \
@@ -64,6 +65,7 @@ noinst_PROGRAMS = \
 	$(EGL_X11_DEMOS) \
 	$(EGL_WL_DEMOS)
 endif
+endif
 
 egltri_x11_SOURCES = egltri.c
 eglgears_x11_SOURCES = eglgears.c
diff --git a/src/util/Makefile.am b/src/util/Makefile.am
index 759a293a..012b9c75 100644
--- a/src/util/Makefile.am
+++ b/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 += \
-- 
2.14.3