I’m trying to update the MacPorts ghc port. The build isn’t getting the TAG_MASK #define for some reason, which breaks the build. The previous release ghc 8.6.5 builds successfully. I’m following the simple build instructions here: https://github.com/ghc/ghc#building--installing https://github.com/ghc/ghc#building--installing # Use prebuilt bootstrap ghc binary export GHC='/opt/local/var/macports/build/_opt_local_ports_lang_ghc/ghc/work/bootstrap/bin/ghc’ ./boot ./configure make -j7 Error:

Creating compiler/stage2/build/Config.hs ...

In file included from compiler/parser/cutils.c:6:0: error:

In file included from includes/Rts.h:191:0: error:

includes/rts/storage/ClosureMacros.h:211:25: error: error: use of undeclared identifier 'TAG_MASK' return (StgWord)p & TAG_MASK; ^ | 211 | return (StgWord)p & TAG_MASK; | ^

…

make[1]: *** [compiler/stage1/build/cbits/genSym.o] Error 1 <> make: *** [all] Error 2

I’m using the macOS native clang: $ which clang /usr/bin/clang $ clang --version Apple clang version 11.0.0 (clang-1100.0.33.16) Target: x86_64-apple-darwin18.7.0 Thread model: posix InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin