How to run the testsuite with an out of tree compiler?

Matthew Pickering matthewtpickering at
Sat Feb 1 09:41:10 UTC 2020

I am trying to run `ghcide` on GHC's tests.

The documentation says that I should pass `--test-compiler=..` to
hadrian in order to do this. When I do this however it starts trying
to configure a bunch of packages and starting to build stuff.

I don't want hadrian to build anything, I just want it to use my
patched version of GHC when running certain tests!

How can I achieve this?



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