nix: default ghc to version 9.6.3

[mgmeier]

Description

This PR adds GHC 9.6.3 via haskell.nix to CI.

[angerman]

I finally found the culprit:

    -- GHC 9.4.5, 9.6.1, and 9.6.2 on Windows do not link against mingwex, but
    -- unix-time implicitly depends on this library due to the use of the
    -- gettimeofday() function, which comes from mingwex on Windows. To avoid
    -- linker errors in the absence of a mingwex dependency (see
    -- https://gitlab.haskell.org/ghc/ghc/-/issues/23533 for an example of
    -- this), we depend on mingwex explicitly here.
    --
    -- Other versions of GHC on Windows already depend on mingwex, so we guard
    -- this behind appropriate conditionals.

from unix-time.

so, now let's see how to resolve this properly.

[angerman]

/nix/store/i7xqxj6xh1hzi06n2vw89i3l3pjk5pbc-x86_64-w64-mingw32-ghc-9.6.2/lib/x86_64-windows-ghc-9.6.2/ghc-prim-0.10.0/HSghc-prim-0.10.0.o: unhandled PEi386 relocation type 14

That failure is a bit more annoying than it should be.

[angerman]

Status update:

• fixed mingwex (Do not try to resolve mingwx; it's part of the libc. input-output-hk/haskell.nix#2032)
• fixed windows relocation issue and wine UNC path issue (Fix Windows and GHC/ucrt. input-output-hk/haskell.nix#2034)

Still two more issue:

• ghc dropped ghci lib support, which I think is somewhat misguided, but now we are left with very slow library loading, to the point where this eventually fails. 🎉
• genprimops is missing and not properly declared as a dependency of lib:ghc 🤦

[angerman]

Turns out we now try to access sincos (a mingwex symbol) from Win32, and of course we haven't loaded that at that point 🤦 That will need an extra symbol. At least we know how to do that.

• lib:ghc was solved for now by not depending on reinstalalble lib:ghc. Not ideal but seems to work.
• the ghci issue seems to rather be limitation in cabal Partially revert #8071 haskell/cabal#9220
• now we also have one more issue in haskell.nix which breaks the build of OpenSSL.

[angerman]

Ok. I think we got most of it, not all of it yet...

[11 of 11] Linking dist/build/trace-dispatcher-examples/trace-dispatcher-examples.exe
/nix/store/fkr9ji0hdzw56y3vk9hhmgzbkhd4v1p8-x86_64-w64-mingw32-binutils-2.35.2/bin/x86_64-w64-mingw32-ld: /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libucrt.a(lib64_libucrt_extra_a-ucrtbase_compat.o):(.text+0x10): multiple definition of `__getmainargs'; /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libmsvcrt.a(libmsvcrt_defs00081.o):(.text+0x0): first defined here
/nix/store/fkr9ji0hdzw56y3vk9hhmgzbkhd4v1p8-x86_64-w64-mingw32-binutils-2.35.2/bin/x86_64-w64-mingw32-ld: /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libucrt.a(lib64_libucrt_extra_a-ucrtbase_compat.o):(.text+0xf0): multiple definition of `_onexit'; /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libmsvcrt.a(libmsvcrt_defs00556.o):(.text+0x0): first defined here
/nix/store/fkr9ji0hdzw56y3vk9hhmgzbkhd4v1p8-x86_64-w64-mingw32-binutils-2.35.2/bin/x86_64-w64-mingw32-ld: /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libucrt.a(lib64_libucrt_extra_a-ucrtbase_compat.o):(.text+0x130): multiple definition of `_amsg_exit'; /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libmsvcrt.a(libmsvcrt_defs00120.o):(.text+0x0): first defined here
/nix/store/fkr9ji0hdzw56y3vk9hhmgzbkhd4v1p8-x86_64-w64-mingw32-binutils-2.35.2/bin/x86_64-w64-mingw32-ld: /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libucrt.a(lib64_libucrt_extra_a-ucrtbase_compat.o):(.text+0x1e0): multiple definition of `_tzset'; /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libmsvcrt.a(libmsvcrt_defs00722.o):(.text+0x0): first defined here
/nix/store/fkr9ji0hdzw56y3vk9hhmgzbkhd4v1p8-x86_64-w64-mingw32-binutils-2.35.2/bin/x86_64-w64-mingw32-ld: /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libucrt.a(lib64_libucrt_extra_a-ucrtbase_compat.o):(.data+0x18): multiple definition of `__imp__amsg_exit'; /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libmsvcrt.a(libmsvcrt_defs00120.o):(.idata$5+0x0): first defined here
/nix/store/fkr9ji0hdzw56y3vk9hhmgzbkhd4v1p8-x86_64-w64-mingw32-binutils-2.35.2/bin/x86_64-w64-mingw32-ld: /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libucrt.a(lib64_libucrt_extra_a-ucrtbase_compat.o):(.data+0x28): multiple definition of `__imp___getmainargs'; /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libmsvcrt.a(libmsvcrt_defs00081.o):(.idata$5+0x0): first defined here
/nix/store/fkr9ji0hdzw56y3vk9hhmgzbkhd4v1p8-x86_64-w64-mingw32-binutils-2.35.2/bin/x86_64-w64-mingw32-ld: /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libucrt.a(lib64_libucrt_extra_a-ucrtbase_compat.o):(.data+0x70): multiple definition of `__imp__onexit'; /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libmsvcrt.a(libmsvcrt_defs00556.o):(.idata$5+0x0): first defined here
collect2: error: ld returned 1 exit status
x86_64-w64-mingw32-ghc: `x86_64-w64-mingw32-cc' failed in phase `Linker'. (Exit code: 1)

sigh.

[angerman]

So that one I also figured out, it's due to unix-compat depending on msvcrt yet, ghc now building against ucrt.
But that has some other fun issue with mingwex as well :( Lots of

Symbol type mismatch.
Symbol _cabs was defined by /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libmingwex.a to be a code symbol.
      yet was defined by /nix/store/jd99w2qxhi9m8p4bmy3mnw31gd9x5ajc-mingw-w64-x86_64-w64-mingw32-10.0.0/lib/libucrt.a to be a data symbol.

(and similar) are now blocking the build.

[angerman]

See also https://gitlab.haskell.org/ghc/ghc/-/issues/22166

[hamishmack]

I've squashed and added a TODO comment related to updating hlint (it is currently using an older version as the only one that builds with GHC 9.6.3 kicks up a lot of lint.