In configure.ac, these should only be a single = 109: if test "x$host" == "x$build" -a "x$host" == "x$target"; then 2525: if test "x$test_perf_events" == "xyes"; then 2697: if test "x$enable_llvm_version_check" == "xyes"; then results in checking if inter-process shared handles are requested... yes /var/tmp/portage/dev-lang/mono-4.0.3.20/work/mono-4.0.3/configure: 25692: test: xno: unexpected operator checking if big-arrays are to be enabled... no
looks like 4.4.1.0 compiles fine