Created attachment 3773 update check for pkg-config Hey, Steve Langasek, in a multi-arch effort for Debian and Ubuntu, discovered an issue in xfce4-dev-tools. The downstream bug is at http://bugs.debian.org/632502 but basically it's a matter of calling AC_PATH_TOOL() instead of AC_PATH_PROG(). As the patch in the downstream bug is a double diff I'm attaching the single patch here for convenience. It takes a different road, using PKG_PROG_PKG_CONFIG() to detect the correct pkg-config. Feel free to ping me (or reply to the debian bug and Steve Langasek) if you need anything.
Pushed a fix in f2eb2c2 to use the macro. To avoid the clueless undefined warning if pkg-config is not installed, the whole thing is in a m4_ifdef and some better warnings we used to have.