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

# 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
<<ghc: 5147183728 bytes, 749 GCs, 27001343/62810440 avg/max bytes residency (18 samples), 150M in use, 0.001 INIT (0.004 elapsed), 2.217 MUT (2.637 elapsed), 1.677 GC (1.738 elapsed) :ghc>>
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