libproxy Cmake is looking for gmcs but that no longer exists as of mono-4.0.3.20 (see bug 558064). probably export CSC early in src_configure would do the trick, i.e.: --- libproxy-0.4.11-r2.ebuild.orig 2015-08-31 11:19:05.926445751 -0700 +++ libproxy-0.4.11-r2.ebuild 2015-08-31 11:22:52.920963433 -0700 @@ -52,6 +52,7 @@ src_configure() { [[ ${CHOST} == *-solaris* ]] && append-libs -lsocket -lnsl use python && python_setup + use mono && export CSC=$( which mcs ) multilib-minimal_src_configure } but somebody with older mono (and/or more mono knowledge than I) should confirm this.
*** This bug has been marked as a duplicate of bug 549734 ***