Gentoo's Bugzilla –
Attachment 841633 Details for
Bug 885523media-sound/audacity-2.4.2-r3 fails to compile (CLANG-STRICTER-SYSTEM): midifile.c:382:11: error: parameter type was not declared, defaults to int; ISO C99 and later do not support implicit int [-Werror,-Wimplicit-int]