For what it's worth, there's a "shortcut" to save a few keystrokes: --test-compiler=stage1

But this broke at some point in the past few months, as documented in #17528. I am however working on a patch to make this work.

On 09/12/2019 23:23, Ben Gamari wrote:
Simon Peyton Jones via ghc-devs <ghc-devs@haskell.org> writes:


Apparently 'sh validate' now uses Hadrian.
This has broken one of my workflows:

  *   build the stage1 compiler
  *   cd testsuite/tests
  *   make stage=1

That is, run the testsuite with the stage-1 compile.  (This often produces a small test case for a compiler crash, much easier than debugging GHC compiling itself.)
How do I do this?

I suspect (but have not tested) that you can accomplish this with

    hadrian/build.cabal.sh --flavor=validate --build-root=_buildvalidate  --test-compiler=_buildvalidate/stage0/bin/ghc

Although I'll admit  this is far from convenient. If you weren't using
the `validate` script this would just be

    hadrian/build.cabal.sh --test-compiler=_build/stage0/bin/ghc

Cheers,

- Ben


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