Created attachment 1927442 [details] tgif-c99.patch Building tgif with a strict(er) C99 compiler currently fails because the source uses old-style function definitions, but does not specify the types of all parameters in some cases. Old-style function definitions are still part of C99, but these implicit ints are not. Implicit int will likely become an error in the default language mode in a future GCC release. Filing this here for tracking purposes, upstream doesn't seem to have a bug tracker.