Gentoo's Bugzilla –
Attachment 833587 Details for
Bug 881953app-admin/chrootuid-1.3-r2 fails to compile (CLANG-STRICTER-SYSTEM): chrootuid.c:57:9: error: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Werror,-Wdeprecated-non-prototype]