From: Roger Mason It isn't clear from your message how you are building ghc. I have ghc-8.4.3 installed from the port on FreeBSD 11.1 and it works without issue.

These two lines:

...

/usr/local/lib/ghc-8.4.2/rts/libHSrts.a(RTS.o): In function `StackOverflowHook': /home/ben/bin-dist-8.4.2-FreeBSD/ghc/rts/hooks/StackOverflow.c:16:0: error:

refer to 8.4.2, which looks a bit fishy to me.

It was a standard port build using portsnap and make && make install. Clean install of the ports tree using a fresh ghc to bootstrap worked correctly - I think the ports tree was very broken. -Sumit