(Not really) funny observation, that page and hadrian/doc/README.md have about the same, but slightly different information. I don't know which one to believe!

- Oleg

Could you add this insight to the wiki somewhere, so we can find it later? https://gitlab.haskell.org/ghc/ghc/-/wikis/building/hadrian seems like the right place.

Thanks!

Richard

On May 26, 2021, at 7:47 AM, Matthew Pickering <matthewtpickering@gmail.com> wrote:

Hi,

I am now using a new flavour combination which is proving *very* nice
as a compromise between fast recompiles and passing tests.

My normal build command is now:

./hadrian/build --flavour=default+no_profiled_libs+omit_pragmas --freeze1 -j

This has the effect of

* base libraries are compiled with optimisation
* Profiling libraries are not built
* Stage 1 compiler is compiled with -O + -fomit-interface-pragmas, so
recompilation behaviour is much better.

The end result is a nearly clean testsuite run (I think there are two
failures) but much faster iterations when modifying `compiler/*`.

Cheers,

Matt
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