Gentoo's Bugzilla –
Attachment 911941 Details for
Bug 944990dev-libs/libowfat-0.33-r1 fails to compile: buffer.h:40:65: error: initialization of ssize_t ()(void) {aka long int ()(void)} from incompatible pointer type ssize_t ()(int, char , size_t) {aka long int ()(int, char , long unsigned int)} [-Wincompatible-p