Gentoo's Bugzilla –
Attachment 844747 Details for
Bug 888003[guru] sys-cluster/clusteringsuite-2.6.9-r3 fails to compile (CLANG-STRICTER-SYSTEM): kalign2_alignment_types.c:56:3: error: call to undeclared function show_percentage_progress; ISO C99 and later do not support implicit function declarations [-Werror,-W