Add RAW support using LibRaw

meson.build

@@ -1,18 +1,22 @@
 project('fastiv', 'c', default_options : ['c_std=gnu99'], version : '0.1.0')
 
+# TODO(p): consider whether libraw_r would be appropriate
+libraw = dependency('libraw', required : get_option('libraw'))
+dependencies = [
+	dependency('gtk+-3.0'),
+	dependency('libturbojpeg'),
+	libraw,
+]
+
 conf = configuration_data()
 conf.set_quoted('PROJECT_NAME', meson.project_name())
 conf.set_quoted('PROJECT_VERSION', meson.project_version())
+conf.set('HAVE_LIBRAW', libraw.found())
 configure_file(
 	output : 'config.h',
 	configuration : conf,
 )
 
-dependencies = [
-	dependency('gtk+-3.0'),
-	dependency('libturbojpeg'),
-]
-
 # TODO(p): we need to create and install a .desktop file
 executable('fastiv', 'fastiv.c', 'fastiv-view.c',
 	install : true,