The windows MSVC build was broken in r142528. "C:\mono-workspace\mono\msvc\mono.sln" (default target) (1) -> (Libraries\libmono target) -> ..\mono\utils\mono-logger.c(144): error C2065: '__func__' : undeclared identifier ..\mono\utils\mono-logger.c(168): error C2065: '__func__' : undeclared identifier Jonathan