Gentoo's Bugzilla –
Attachment 851058 Details for
Bug 894344app-benchmarks/stress-ng-0.15.03 fails to compile (MUSL-CLANG-SYSTEM): core-shim.c:1942:9: error: call to undeclared function clock_adjtime; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]