https://bugs.winehq.org/show_bug.cgi?id=50436
--- Comment #6 from j-r@online.de --- (In reply to Sveinar Søpler from comment #5)
Hmm.. it could maybe look like a typo in configure perhaps? I would assume so, even tho configure finds the right libraries when it is installed in system folders (by other means i guess... -lFAudio flag and such).
running: pkg-config --cflags faudio produces an error for me aswell, but using pkg-config --cflags FAudio does not.
If pkg-config doesn't work, configure uses -lFAudio by default, therefore everything is fine as long as FAudio is installed in standard include and lib directories.
I think it is not a typo in configure. The upstream FAudio.pc file has only been added recently. It seems that earlier some distributions provided their own pkg-config file and it seems at least some of them used the lowercase variant.