I've been around *nix long enough to remember having done this in the past, and now those neural pathways are gone... I'm searching /usr/local/lib for files that contain img_convert because I'm getting a link error and want to find the library to include which contains that reference.
This command finds the reference, but doesn't print the containing file names:
$ strings /usr/local/lib/* | grep 'img_convert' img_convert img_convert
Of course, I could script this, however I'm sure there's a way to do this from the command line... so any help is appreciated!