gobject-introspection-1.0.pc causes failures due to libffi dependency

[grimmy]

I'm trying to compile some of my own software that depends gobject-introspection (which was just added), however, it depends on libffi, which is a key-only package, which means no libffi.pc gets linked in /usr/local/lib/pkg-config. Looking for suggestions/fixes.

[jacknagel]

You can add the libffi pkgconfig directory to your PKG_CONFIG_PATH, it should be HOMEBREW_CELLAR/libffi/<version>/lib/pkgconfig

(In Homebrew, this is done automatically when something in a formula's dependency tree is keg-only.)

[jacknagel]

Or more robustly

$(brew --prefix libffi)/lib/pkgconfig

[grimmy]

ah cool that's a lot easier than I thought it'd be :) Any suggestions for how to detect that I'm building against brew installed software?

[grimmy]

I think I've come to a decent solution. Use "which pkg-config" to find it's path, and then see if it's a symlink that's in /usr/local//Cellar. and if so, then add the libffi prefix to PKG_CONFIG_PATH.

Does this sound reasonable?

[jacknagel]

Makes sense.

[grimmy]

Cool, wasn't sure if an environment variable or something got set. If so I'd prefer to use that, but this will work. Thanks again!