clients: Make poppler-glib optional

Just don't compile the view client.

clients/Makefile.am

@@ -1,10 +1,20 @@
-noinst_PROGRAMS = gears flower screenshot terminal image view dnd smoke resizor
+noinst_PROGRAMS =				\
+	gears					\
+	flower					\
+	screenshot				\
+	terminal				\
+	image					\
+	$(poppler_programs)			\
+	dnd					\
+	smoke					\
+	resizor
+
 noinst_LTLIBRARIES = libtoytoolkit.la
 
 INCLUDES =					\
 	-I$(top_srcdir)/wayland			\
 	-I$(top_builddir)/wayland			\
-	$(CLIENT_CFLAGS) $(POPPLER_CFLAGS)
+	$(CLIENT_CFLAGS)
 
 LDADD = libtoytoolkit.la				\
 	$(top_builddir)/wayland/libwayland-client.la	\
@@ -27,7 +37,6 @@ gears_SOURCES = gears.c
 screenshot_SOURCES = screenshot.c screenshooter-protocol.c
 terminal_SOURCES = terminal.c
 image_SOURCES = image.c
-view_SOURCES = view.c
 dnd_SOURCES = dnd.c
 resizor_SOURCES = resizor.c
 
@@ -40,4 +49,10 @@ CLEANFILES = $(BUILT_SOURCES)
 include $(top_srcdir)/wayland/scanner.mk
 
 terminal_LDADD = $(LDADD) -lutil
+
+if HAVE_POPPLER
+poppler_programs = view
+view_SOURCES = view.c
 view_LDADD = $(LDADD) $(POPPLER_LIBS)
+view_CPPFLAGS = $(POPPLER_CFLAGS)
+endif

configure.ac

@@ -25,7 +25,10 @@ PKG_CHECK_MODULES(FFI, [libffi])
 PKG_CHECK_MODULES(COMPOSITOR,
 		  [egl glesv2 gdk-pixbuf-2.0 libudev >= 136 libdrm >= 2.4.17] xcb-dri2 xcb-xfixes)
 PKG_CHECK_MODULES(CLIENT, [egl gl cairo gdk-pixbuf-2.0 glib-2.0 gobject-2.0 xkbcommon libdrm])
-PKG_CHECK_MODULES(POPPLER, [poppler-glib gdk-2.0])
+PKG_CHECK_MODULES(POPPLER, [poppler-glib gdk-2.0],
+			   [have_poppler=yes], [have_poppler=no])
+AM_CONDITIONAL(HAVE_POPPLER, test "x$have_poppler" = "xyes")
+
 PKG_CHECK_MODULES(CAIRO_GL, [cairo-gl],
 		  [have_cairo_gl=yes], [have_cairo_gl=no])
 AS_IF([test "x$have_cairo_gl" = "xyes"],