From b25e9c675cf560b8b037dc855c6b3b1d09957867 Mon Sep 17 00:00:00 2001
From: Martin Jansa <Martin.Jansa@gmail.com>
Date: Wed, 9 Jul 2014 14:23:41 +0200
Subject: [PATCH 3/9] configure: Allow to disable demos which require GLEW or
 GLU

* in some systems without X11 support we don't have GLEW, but
  mesa-demos are still useful

Upstream-Status: Pending

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
---
 configure.ac                  | 49 ++++++++++++++++++++---------
 src/Makefile.am               | 14 ++++++---
 src/demos/Makefile.am         | 73 ++++++++++++++++++++++++-------------------
 src/egl/Makefile.am           |  8 +++--
 src/egl/opengles1/Makefile.am | 44 +++++++++++++++-----------
 src/egl/opengles2/Makefile.am | 33 ++++++++++---------
 6 files changed, 135 insertions(+), 86 deletions(-)

diff --git a/configure.ac b/configure.ac
index 9445424..bc4c8d1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,25 +93,44 @@ AC_EGREP_HEADER([glutInitContextProfile],
 		[AC_DEFINE(HAVE_FREEGLUT)],
 		[])
 
-dnl Check for GLEW
-PKG_CHECK_MODULES(GLEW, [glew >= 1.5.4])
-DEMO_CFLAGS="$DEMO_CFLAGS $GLEW_CFLAGS"
-DEMO_LIBS="$DEMO_LIBS $GLEW_LIBS"
+AC_ARG_ENABLE([glew],
+    [AS_HELP_STRING([--enable-glew],
+        [build demos which require glew @<:@default=yes@:>@])],
+    [enable_glew="$enableval"],
+    [enable_glew=yes]
+)
+
+if test "x$enable_glew" = xyes; then
+    dnl Check for GLEW
+    PKG_CHECK_MODULES(GLEW, [glew >= 1.5.4], [glew_enabled=yes], [glew_enabled=no])
+    DEMO_CFLAGS="$DEMO_CFLAGS $GLEW_CFLAGS"
+    DEMO_LIBS="$DEMO_LIBS $GLEW_LIBS"
+fi
 
 # LIBS was set by AC_CHECK_LIB above
 LIBS=""
 
-PKG_CHECK_MODULES(GLU, [glu], [],
-		  [AC_CHECK_HEADER([GL/glu.h],
-				   [],
-		  		   AC_MSG_ERROR([GLU not found]))
-		   AC_CHECK_LIB([GLU],
-				[gluBeginCurve],
-				[GLU_LIBS=-lGLU],
-				AC_MSG_ERROR([GLU required])) ])
+AC_ARG_ENABLE([glu],
+    [AS_HELP_STRING([--enable-glu],
+        [build demos which require glu @<:@default=yes@:>@])],
+    [enable_glu="$enableval"],
+    [enable_glu=yes]
+)
 
-DEMO_CFLAGS="$DEMO_CFLAGS $GLU_CFLAGS"
-DEMO_LIBS="$DEMO_LIBS $GLU_LIBS"
+if test "x$enable_glu" = xyes; then
+    PKG_CHECK_MODULES(GLU, [glu], [glu_enabled=yes],
+                     [AC_CHECK_HEADER([GL/glu.h],
+                                      [],
+                                      AC_MSG_ERROR([GLU not found]))
+                      AC_CHECK_LIB([GLU],
+                                   [gluBeginCurve],
+                                   [GLU_LIBS=-lGLU
+				    glu_enabled=yes],
+                                   AC_MSG_ERROR([GLU required])) ])
+
+    DEMO_CFLAGS="$DEMO_CFLAGS $GLU_CFLAGS"
+    DEMO_LIBS="$DEMO_LIBS $GLU_LIBS"
+fi
 
 AC_ARG_ENABLE([egl],
     [AS_HELP_STRING([--enable-egl],
@@ -304,6 +323,8 @@ AC_SUBST([WAYLAND_CFLAGS])
 AC_SUBST([WAYLAND_LIBS])
 
 
+AM_CONDITIONAL(HAVE_GLU, test "x$glu_enabled" = "xyes")
+AM_CONDITIONAL(HAVE_GLEW, test "x$glew_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/Makefile.am b/src/Makefile.am
index 1647d64..754c47c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -23,14 +23,18 @@
 #    Eric Anholt <eric@anholt.net>
 
+if HAVE_GLEW
+UTIL = util
+endif
+
 SUBDIRS = \
-	util \
+	$(UTIL) \
 	data \
 	demos \
 	egl \
 	fp \
 	fpglsl \
 	glsl \
-        gs \
+	gs \
 	objviewer \
 	osdemos \
 	perf \
@@ -40,8 +39,12 @@ SUBDIRS = \
 	slang \
 	tests \
 	tools \
-	trivial \
-	vp \
-	vpglsl \
 	wgl \
 	xdemos
+
+if HAVE_GLEW
+SUBDIRS += \
+	vp \
+	vpglsl \
+	trivial
+endif
diff --git a/src/demos/Makefile.am b/src/demos/Makefile.am
index 41603fa..ab1e3ab 100644
--- a/src/demos/Makefile.am
+++ b/src/demos/Makefile.am
@@ -30,91 +30,100 @@ AM_LDFLAGS = \
 	$(DEMO_LIBS) \
 	$(GLUT_LIBS)
 
+bin_PROGRAMS =
+
 if HAVE_GLUT
-bin_PROGRAMS = \
+if HAVE_GLEW
+bin_PROGRAMS += \
 	arbfplight \
 	arbfslight \
 	arbocclude \
 	arbocclude2 \
-	bounce \
-	clearspd \
 	copypix \
 	cubemap \
 	cuberender \
 	dinoshade \
-	dissolve \
-	drawpix \
 	engine \
 	fbo_firecube \
 	fbotexture \
-	fire \
 	fogcoord \
 	fplight \
 	fslight \
+	gloss \
+	isosurf \
+	multiarb \
+	paltex \
+	pointblast \
+	projtex \
+	shadowtex \
+	spriteblast \
+	stex3d \
+	textures \
+	vao_demo \
+	winpos
+
+copypix_LDADD = ../util/libutil.la
+cubemap_LDADD = ../util/libutil.la
+cuberender_LDADD = ../util/libutil.la
+engine_LDADD = ../util/libutil.la
+fbo_firecube_LDADD = ../util/libutil.la
+gloss_LDADD = ../util/libutil.la
+isosurf_LDADD = ../util/libutil.la
+multiarb_LDADD = ../util/libutil.la
+projtex_LDADD = ../util/libutil.la
+textures_LDADD = ../util/libutil.la
+winpos_LDADD = ../util/libutil.la
+endif
+
+if HAVE_GLU
+bin_PROGRAMS += \
+	bounce \
+	clearspd \
+	dissolve \
+	drawpix \
+	fire \
 	gamma \
 	gearbox \
 	gears \
 	geartrain \
 	glinfo \
-	gloss \
 	gltestperf \
 	ipers \
-	isosurf \
 	lodbias \
 	morph3d \
-	multiarb \
-	paltex \
 	pixeltest \
-	pointblast \
-	projtex \
 	ray \
 	readpix \
 	reflect \
 	renormal \
-	shadowtex \
 	singlebuffer \
 	spectex \
-	spriteblast \
-	stex3d \
 	teapot \
 	terrain \
 	tessdemo \
 	texcyl \
 	texenv \
-	textures \
 	trispd \
 	tunnel2 \
-	tunnel \
-	vao_demo \
-	winpos
-endif
+	tunnel
 
 tunnel_SOURCES = \
 	tunnel.c \
 	tunneldat.h
 
-copypix_LDADD = ../util/libutil.la
-cubemap_LDADD = ../util/libutil.la
-cuberender_LDADD = ../util/libutil.la
-drawpix_LDADD = ../util/libutil.la
 dissolve_LDADD = ../util/libutil.la
-engine_LDADD = ../util/libutil.la
-fbo_firecube_LDADD = ../util/libutil.la
+drawpix_LDADD = ../util/libutil.la
 fire_LDADD = ../util/libutil.la
-gloss_LDADD = ../util/libutil.la
 ipers_LDADD = ../util/libutil.la
-isosurf_LDADD = ../util/libutil.la
 lodbias_LDADD = ../util/libutil.la
-multiarb_LDADD = ../util/libutil.la
-projtex_LDADD = ../util/libutil.la
 readpix_LDADD = ../util/libutil.la
 reflect_LDADD = ../util/libutil.la
 teapot_LDADD = ../util/libutil.la
 texcyl_LDADD = ../util/libutil.la
-textures_LDADD = ../util/libutil.la
 tunnel_LDADD = ../util/libutil.la
 tunnel2_LDADD = ../util/libutil.la
-winpos_LDADD = ../util/libutil.la
+endif
+endif
 
 EXTRA_DIST = \
 	README
diff --git a/src/egl/Makefile.am b/src/egl/Makefile.am
index d64a49e..4fe1ca8 100644
--- a/src/egl/Makefile.am
+++ b/src/egl/Makefile.am
@@ -24,8 +24,12 @@
 
 SUBDIRS = \
 	eglut \
-	opengl \
-	openvg \
 	opengles1 \
 	opengles2 \
 	oes_vg
+
+if HAVE_GLU
+SUBDIRS += \
+	opengl \
+	openvg
+endif
diff --git a/src/egl/opengles1/Makefile.am b/src/egl/opengles1/Makefile.am
index 7a9828d..3455e75 100644
--- a/src/egl/opengles1/Makefile.am
+++ b/src/egl/opengles1/Makefile.am
@@ -36,28 +36,43 @@ AM_LDFLAGS = \
 	$(EGL_LIBS) \
 	-lm
 
+noinst_PROGRAMS =
+
 if HAVE_EGL
 if HAVE_GLESV1
-noinst_PROGRAMS = \
-	bindtex \
-	clear \
+noinst_PROGRAMS += \
 	drawtex_screen \
+	gears_screen \
+	torus_screen \
+	tri_screen
+
+drawtex_screen_SOURCES = drawtex.c
+gears_screen_SOURCES = gears.c
+torus_screen_SOURCES = torus.c
+tri_screen_SOURCES = tri.c
+
+drawtex_screen_LDADD = ../eglut/libeglut_screen.la
+gears_screen_LDADD = ../eglut/libeglut_screen.la
+torus_screen_LDADD = ../eglut/libeglut_screen.la
+tri_screen_LDADD = ../eglut/libeglut_screen.la
+
+if HAVE_X11
+noinst_PROGRAMS += \
+	clear
+
+bin_PROGRAMS = \
+	bindtex \
 	drawtex_x11 \
 	eglfbdev \
 	es1_info \
-	gears_screen \
 	gears_x11 \
 	msaa \
 	pbuffer\
 	render_tex \
 	texture_from_pixmap \
-	torus_screen \
 	torus_x11 \
-	tri_screen \
 	tri_x11 \
 	two_win
-endif
-endif
 
 bindtex_LDADD = $(X11_LIBS)
 es1_info_LDADD = $(X11_LIBS)
@@ -71,22 +86,15 @@ two_win_LDADD = $(X11_LIBS)
 clear_LDADD = ../eglut/libeglut_x11.la $(EGL_LIBS) $(X11_LIBS)
 clear_LDFLAGS =
 
-drawtex_screen_SOURCES = drawtex.c
-gears_screen_SOURCES = gears.c
-torus_screen_SOURCES = torus.c
-tri_screen_SOURCES = tri.c
-
 drawtex_x11_SOURCES = drawtex.c
 gears_x11_SOURCES = gears.c
 torus_x11_SOURCES = torus.c
 tri_x11_SOURCES = tri.c
 
-drawtex_screen_LDADD = ../eglut/libeglut_screen.la
-gears_screen_LDADD = ../eglut/libeglut_screen.la
-torus_screen_LDADD = ../eglut/libeglut_screen.la
-tri_screen_LDADD = ../eglut/libeglut_screen.la
-
 drawtex_x11_LDADD = ../eglut/libeglut_x11.la
 gears_x11_LDADD = ../eglut/libeglut_x11.la
 torus_x11_LDADD = ../eglut/libeglut_x11.la
 tri_x11_LDADD = ../eglut/libeglut_x11.la
+endif
+endif
+endif
diff --git a/src/egl/opengles2/Makefile.am b/src/egl/opengles2/Makefile.am
index 41c1b80..74af460 100644
--- a/src/egl/opengles2/Makefile.am
+++ b/src/egl/opengles2/Makefile.am
@@ -36,26 +36,29 @@ AM_LDFLAGS = \
 if HAVE_EGL
 if HAVE_GLESV2
 bin_PROGRAMS = \
-	es2_info \
-	es2gears_screen \
-	es2gears_x11 \
-	es2tri
+	es2gears_screen
+
+es2gears_screen_SOURCES = es2gears.c
+es2gears_screen_LDADD = ../eglut/libeglut_screen.la
+
 if HAVE_WAYLAND
 bin_PROGRAMS += es2gears_wayland
-endif
-endif
-endif
 
-es2_info_LDADD = $(X11_LIBS)
-es2tri_LDADD = $(X11_LIBS)
+es2gears_wayland_SOURCES = es2gears.c
+es2gears_wayland_LDADD = ../eglut/libeglut_wayland.la
+endif
 
-es2gears_screen_SOURCES = es2gears.c
+if HAVE_X11
+bin_PROGRAMS += \
+	es2tri \
+	es2_info \
+	es2gears_x11
 
+es2_info_LDADD = $(X11_LIBS)
 es2gears_x11_SOURCES = es2gears.c
-
-es2gears_screen_LDADD = ../eglut/libeglut_screen.la
-
 es2gears_x11_LDADD = ../eglut/libeglut_x11.la
+es2tri_LDADD = $(X11_LIBS)
+endif
+endif
+endif
 
-es2gears_wayland_SOURCES = es2gears.c
-es2gears_wayland_LDADD = ../eglut/libeglut_wayland.la
-- 
2.0.0