Intree gmp builds using Hadrian use system gmp headers

[Carter Schonwald]

If folks can reproduce this issue on other platforms than OS X , id greatly
appreciate it. If only to confirm that it’s as reproducible as I believe it
is.

I should mention that at least on OS X, it’s slightly easier to trigger the
issue / stumble across it with gcc rather than clang (on OS X, clang was
picking up the o stalled system headers but gcc was failing. Without
installed headers both fail for me. )

On Mon, Jan 27, 2020 at 10:37 PM Carter Schonwald <
carter.schonwald at gmail.com> wrote:

> Hey all,
> For those using Hadrian for platforms where intree gmp config is
> important, some sleuthing I’ve done over the past half  seems to indicate
> that currently it’s not correct via Hadrian, but only via make.
>
> https://gitlab.haskell.org/ghc/ghc/issues/17756
> I’m able to reproduce this on multiple OS X machines (though it took me a
> while to read apart that is Hadrian specific.)
>
> Punchline : at the moment, Hadrian intree gmp builds succeed because gmp
> headers in default include search paths of gcc/clang get picked up. In a
> properly isolated environment / one without the offending header leakage,
> I’m able at least on OS X to get Hadrian with intree gmp to consistently
> fail.
>
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