Created attachment 284645 [details] Build log Package dev-libs/libsigc++ doesn't build without sys-devel/m4. The error is: configure: error: The GNU M4 macro processor is required for building libsigc++. Please, add a sys-devel/m4 as dependency of dev-libs/libsigc++.
*** This bug has been marked as a duplicate of bug 377897 ***