with gtk{2,3}-ubuntu, still fail to build libdbusmenu-gtk{2,3}

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http://chakra-project.org – Sorry, I finally built libdbusmenu and libdbusmenu-gtk2 under /extra. Though, I'm having problems with libdbusmenu-gtk3 and lib32-json-glib.It seems that libdbusmenu refuses refuses to see libgtk3 under the extra repository even though I set the prefix to be /extra/usr in the PKGBUILD.Also, lib32-json-glib says my C compilier is not working even though the gcc -32 flag is passed in the PKGBUILD. I have never built a lib32 package but isn't the flags set correctly in the CCR package of lib32-json-glib? (HowTos)