use pkg-config to look up the glib include path for itools compilation.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@34304 20353a03-c40f-0410-a6d1-a30d3c3de9de

buildout/software-profiles/erp5-2.12.cfg

@@ -43,7 +43,7 @@ on_update = False
 # execution
 cmds =
     cd ${itools-download:destination}
-    ${python2.6:executable} setup.py install_lib -d ${itools:lib}
+    env CFLAGS="$(pkg-config glib-2.0 --cflags-only-I)" ${python2.6:executable} setup.py install_lib -d ${itools:lib}
 
 uninstall_cmds =
     cd ${itools-download:destination}