[gthumb: 75/129] don't compile jpeg loader if libjpeg is not available

[Paolo Bacchilega <paobac src gnome org>]

commit b8b7233076c80e191fa6e487410c61d9b5fb20d9
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Apr 24 17:29:11 2011 +0200

    don't compile jpeg loader if libjpeg is not available

 extensions/cairo_io/Makefile.am |   16 ++++++++++++----
 extensions/cairo_io/main.c      |    2 ++
 2 files changed, 14 insertions(+), 4 deletions(-)
---
diff --git a/extensions/cairo_io/Makefile.am b/extensions/cairo_io/Makefile.am
index ee2dfb2..283897b 100644
--- a/extensions/cairo_io/Makefile.am
+++ b/extensions/cairo_io/Makefile.am
@@ -2,13 +2,21 @@ extensiondir = $(pkglibdir)/extensions
 extension_LTLIBRARIES = libcairo_io.la
 
 libcairo_io_la_SOURCES = 	\
-	cairo-io-jpeg.c		\
-	cairo-io-jpeg.h		\
 	main.c
 
-libcairo_io_la_CFLAGS = $(GTHUMB_CFLAGS) $(JPEG_CFLAGS) -I$(top_srcdir) -I$(top_builddir)/gthumb 
+if ENABLE_JPEG_TOOLS
+libcairo_io_la_SOURCES +=	\
+	cairo-io-jpeg.c		\
+	cairo-io-jpeg.h
+endif
+
+libcairo_io_la_CFLAGS = $(GTHUMB_CFLAGS) $(JPEG_CFLAGS) -I$(top_srcdir) -I$(top_builddir)/gthumb
 libcairo_io_la_LDFLAGS = $(EXTENSION_LIBTOOL_FLAGS)
-libcairo_io_la_LIBADD = $(GTHUMB_LIBS) $(JPEG_LIBS) ../jpeg_utils/libjpeg_utils.la
+libcairo_io_la_LIBADD = $(GTHUMB_LIBS) $(JPEG_LIBS)
+if ENABLE_JPEG_TOOLS
+libcairo_io_la_LIBADD += ../jpeg_utils/libjpeg_utils.la
+endif
+
 libcairo_io_la_DEPENDENCIES = $(top_builddir)/gthumb/gthumb$(EXEEXT)
 
 extensioninidir = $(extensiondir)
diff --git a/extensions/cairo_io/main.c b/extensions/cairo_io/main.c
index 94abcaf..7f74c92 100644
--- a/extensions/cairo_io/main.c
+++ b/extensions/cairo_io/main.c
@@ -28,10 +28,12 @@
 G_MODULE_EXPORT void
 gthumb_extension_activate (void)
 {
+#ifdef HAVE_LIBJPEG
 	gth_main_register_image_loader_func (_cairo_image_surface_create_from_jpeg,
 					     GTH_IMAGE_FORMAT_CAIRO_SURFACE,
 					     "image/jpeg",
 					     NULL);
+#endif
 }