From 53d69adcafd2eca83790bdb18437ed36e0fbd970 Mon Sep 17 00:00:00 2001
From: Thibault Saunier <tsaunier@gnome.org>
Date: Fri, 26 Aug 2016 20:06:22 -0300
Subject: [PATCH] meson: Add support for building GIR when used as subproject

Add allow project to us it as subproject too
---
 meson.build                       |  1 +
 validate/gst/validate/meson.build | 24 ++++++++++++++++++------
 2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/meson.build b/meson.build
index 251c4ed..a3bd25a 100644
--- a/meson.build
+++ b/meson.build
@@ -44,6 +44,7 @@ mathlib = cc.find_library('m', required : false)
 
 gst_c_args = ['-DHAVE_CONFIG_H', '-DGST_USE_UNSTABLE_API']
 
+gir_init_section = [ '--add-init-section=extern void gst_init(gint*,gchar**); gst_init(NULL,NULL);' ]
 gir = find_program('g-ir-scanner', required : false)
 build_gir = gir.found() and not meson.is_cross_build() and not get_option('disable-introspection')
 gnome = import('gnome')
diff --git a/validate/gst/validate/meson.build b/validate/gst/validate/meson.build
index d729986..c617d25 100644
--- a/validate/gst/validate/meson.build
+++ b/validate/gst/validate/meson.build
@@ -48,15 +48,24 @@ gstvalidate = shared_library('gstvalidate',
     dependencies : [gst_dep, glib_dep, gio_dep, gmodule_dep,
                     gst_pbutils_dep, mathlib])
 
+validate_gen_sources = []
 if build_gir
-    gnome.generate_gir(gstvalidate,
-            include_directories : include_directories('..'),
+    gst_validate_gir_extra_args = gir_init_section + [ '--c-include=gst/validate/validate.h' ]
+    if meson.is_subproject()
+      # FIXME: There must be a better way to do this
+      # Need to pass the include path to find gst/gst.h and gst/gstenumtypes.h (built)
+      gst_validate_gir_extra_args += ['--cflags-begin',
+	  '-I' + meson.current_source_dir() + '/../../',
+	  '-I' + meson.current_build_dir() + '/../../',
+	  '--cflags-end']
+    endif
+    validate_gen_sources = [gnome.generate_gir(gstvalidate,
             sources : gstvalidate_sources,
             nsversion : '1.0',
             namespace : 'GstValidate',
             symbol_prefix : 'gst_',
             identifier_prefix : 'Gst',
-            export_packages : 'gstvalidate-' + apiversion,
+            export_packages : 'gst-validate-' + apiversion,
             includes : ['GObject-2.0',
                         'GLib-2.0',
                         'Gio-2.0',
@@ -64,11 +73,14 @@ if build_gir
                         'GstVideo-' + apiversion,
                         'Gst-' + apiversion,
                         'GstPbutils-' + apiversion],
-            install : true
-    )
+            install : true,
+            dependencies : [gst_dep, glib_dep, gio_dep, gst_pbutils_dep],
+    )]
 endif
 
 validate_dep = declare_dependency(link_with : gstvalidate,
   include_directories : [inc_dirs],
   dependencies : [gst_dep, glib_dep, gio_dep, gmodule_dep,
-                  gst_pbutils_dep, mathlib])
+                  gst_pbutils_dep, mathlib],
+  sources : validate_gen_sources
+)
-- 
2.7.4