ghc-lib-parser 9.12.2 fails to build with ghc-9.8.4 and ghc-lib-parser-9.10.1 fails to build with ghc-9.6.7

[GuillaumedeVolpiano]

Probably related to this https://gitlab.haskell.org/ghc/ghc/-/merge_requests/10568
(patch here https://gitlab.haskell.org/ghc/ghc/-/commit/e421ec3c8fc9688b3f7ee08c0d1baaf1cb7aa750)
Linking /root/github/stylish-haskell/dist-newstyle/build/x86_64-linux/ghc-9.8.4/stylish-haskell-0.14.6.0/t/stylish-haskell-tests/build/stylish-haskell-tests/stylish-haskell-tests /usr/lib/gcc/x86_64-pc-linux-gnu/14/../../../../x86_64-pc-linux-gnu/bin/ld: /usr/lib64/ghc-9.8.4/lib/../lib/x86_64-linux-ghc-9.8.4/rts-1.0.2/libHSrts-1.0.2.a(Globals.o):(.bss+0x0): multiple definition of ghc_unique_counter64'; /root/.local/state/cabal/store/ghc-9.8.4/ghc-lib-parser-9.12.2.20250320-48b5863d60855e9cdc5daef7f57fb49458d3bd0c527dd8950e22b0a76fe73a30/lib/libHSghc-lib-parser-9.12.2.20250320-48b5863d60855e9cdc5daef7f57fb49458d3bd0c527dd8950e22b0a76fe73a30.a(genSym.o):(.bss+0x0): first defined here`

[GuillaumedeVolpiano]

Actually the issue is here. It seems related to this #581

[GuillaumedeVolpiano]

I see this is actually fixed in d4e1bc6#diff-472eaebd24c7e540a4d552d3b13cab6de8eb8d327990ae09778d91f30ae430f1 .

[shayne-fletcher]

i'm not sure you want to close this? i can't reproduce a failure but i don't like the contents of genSym.c in that version of ghc-lib for 9.8.4 -- looks wrong. lmk!

[GuillaumedeVolpiano]

Well, I didn't want to clutter. The issue is that I don't have ghc-9.6.7 on my local machine to test just yet. I assumed that your commit fixed it, but if your happy with it, I'll investigate!

[jhrcek]

@GuillaumedeVolpiano can you try installing ghc 9.6.7 using ghcup (should support installation to gentoo afaik) and test it that way?

[jhrcek]

Indeed, I was able to reproduce the issue locally (getting the same build error when building stylish-haskell with ghc 9.6.7).
Alas I'm not really sure how to test, whether this issue is fixed on ghc-lib's master. It will probably require following instructions in the readme to obtain local checkout of ghc-lib-parser library + using stylish-haskell's cabal.project pointing to that? @shayne-fletcher do you have some suggestions how this could be done? Or alternatively would you be willing to release a new version of ghc-lib-parser with the latest fixes?

[GuillaumedeVolpiano]

OK, sorry for the noob question, but when running

cabal run exe:ghc-lib-build-tool -- --ghc-flavor=ghc-9.12.2

in my ghc-9.8.4 sandbox, I get the following error message…

config.status: creating ghcautoconf.h.autoconf
configure: WARNING: unrecognized options: --with-compiler, --with-cc
| Run DeriveConstants: none => ghc-lib/stage0/rts/build/include/DerivedConstants.h (and 1 more)
Build completed in 52.97s

ghc-lib-gen: Failed when running system command: cabal -v0 path --store-dir

Same thing in my ghc-9.6.6 sandbox.

ghc-9.6.7 sandbox in construction. I'm also creating an Ubuntu container to see what gives there.

[GuillaumedeVolpiano]

Just confirming that I hit the same issue with ghc-9.6.7/ghc-lib-parser-9.10 and ghc-9.8.4/ghc-lib-parser-9.12.2 on clean ubuntu based sandboxes. No such issue with ghc-9.8.4/ghc-lib-parser-9.10.1