Build GHC with cabal-install and a Makefile

[hsyl20]

Note that we need a patched cabal: https://github.com/hsyl20/cabal/tree/hsyl20/per-file-extra-source-options

• Build ghc-stage1
• Generate valid non-cross stage1 settings (reusing stage0's settings for the most part)
• Build boot libraries with stage1: ghc-prim, ghc-internal, base
• Build ghc-stage2
• Build a bindist
• For every host/arch we want to build a compiler for:
  • generate valid stage2 settings for the target (using ghc-toolchain?)
  • use ghc-stage2 with these settings to build root libraries
  • use ghc-stage2 with these settings to build iserv
  • (optional) use ghc-stage2 with these settings to cross-build a GHC
• run the testsuite on CI

[hsyl20]

Current status: it builds some ghc program in _build/stage0/bin/ghc. It seems to be linked with the wrong ghc-boot because it reports a GHC version of 9.8.2 (my bootstrap GHC).

[hsyl20]

Ah, I need to pass some environment variable to ghc-boot's Setup.hs

[angerman]

Thank you @hsyl20 this looks like a great start!

[hsyl20]

Now it seems like cabal doesn't like empty package databases:

Error: [Cabal-9076]
failed to parse output of 'ghc-pkg dump'

Edit: that was my mistake (a debug statement in ghc-pkg...). Now it works.

[andreabedini]

Effectively we want to completely disable the solver. We can add
active-respositories: :none to cabal.project and remove the source constraints.

[hsyl20]

Effectively we want to completely disable the solver. We can add active-respositories: :none to cabal.project and remove the source constraints.

I've disabled it for stage1 where we start fresh to build boot libraries.

[hsyl20]

I get the same failure as on CI:

/bin/sh: 1: -E: not found
Build.hs: readCreateProcess: $CC -E -undef -traditional -P -x c /home/runner/work/ghc/ghc/_build/stage1/src/libraries/ghc/GHC/Builtin/primops.txt.pp (exit 127): failed
make: *** [Makefile:9: all] Error 1

Is $CC supposed to be set by default?

[hsyl20]

We should perhaps use cc instead?

[angerman]

I get the same failure as on CI:

/bin/sh: 1: -E: not found
Build.hs: readCreateProcess: $CC -E -undef -traditional -P -x c /home/runner/work/ghc/ghc/_build/stage1/src/libraries/ghc/GHC/Builtin/primops.txt.pp (exit 127): failed
make: *** [Makefile:9: all] Error 1

Is $CC supposed to be set by default?

I did set it in CI. CC=gcc, CXX=g++

We should perhaps use cc instead?

worth a try.

[hsyl20]

Unexpected failures in the testsuite should be all addressed. Now I need to address unexpected passes

[hsyl20]

Two unexpected passes left: TEST="frontend01 test-phase-hooks-plugin"

The weird thing is that they don't pass locally... I'll try to debug this.

[hsyl20]

Two unexpected passes left: TEST="frontend01 test-phase-hooks-plugin"

The weird thing is that they don't pass locally... I'll try to debug this.

"Fixed" by nuking ~/.cabal/store/ghc-9.13-inplace again... I've opened #29 to track this

[hsyl20]

Last test is now fixed.