[gnome-boxes] build-sys: Pass --target-glib to valac

[Christophe Fergeau <teuf src gnome org>]

commit dd20c5d5a150a8c07678f256cf7c2ff1a1bec78b
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Wed Jan 30 15:39:57 2013 +0100

    build-sys: Pass --target-glib to valac
    
    This allows valac to use functions introduced in newer glib versions.
    For example, it prefer g_byte_array_unref (introduced in glib 2.22)
    to g_byte_array_free when --target-glib is higher than 2.22
    
    https://bugzilla.gnome.org/show_bug.cgi?id=681747

 configure.ac    |    1 +
 src/Makefile.am |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 557cd23..e7d1c68 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,6 +44,7 @@ GLIB_GSETTINGS
 CLUTTER_GTK_MIN_VERSION=1.3.2
 CLUTTER_MIN_VERSION=1.11.14
 GLIB_MIN_VERSION=2.32.0
+AC_SUBST(GLIB_MIN_VERSION)
 GOBJECT_INTROSPECTION_MIN_VERSION=0.9.6
 GTK_MIN_VERSION=3.5.5
 GTK_VNC_MIN_VERSION=0.4.4
diff --git a/src/Makefile.am b/src/Makefile.am
index 25373eb..eb1323b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -14,6 +14,7 @@ AM_CPPFLAGS =						\
 
 AM_VALAFLAGS =						\
 	--enable-experimental				\
+	--target-glib= GLIB_MIN_VERSION@		\
 	--vapidir=$(srcdir)/				\
 	--vapidir=$(top_srcdir)/libgd                   \
 	--vapidir=$(top_srcdir)/vapi                    \