Gentoo's Bugzilla –
Attachment 854760 Details for
Bug 897858net-dialup/rp-l2tp-0.4-r4 fails to compile (MUSL-CLANG-SYSTEM): cmd-control.c:53:5: error: call to undeclared library function memset with type void (void , int, unsigned long); ISO C99 and later do not support implicit function declarations [-Wimplicit-