GHC HEAD now needs extra tools to build libffi?

[Ben Gamari]

Sylvain Henry <sylvain at haskus.fr> writes:

> I don't know if it helps, but upgrading my ArchLinux installation 
> yesterday broke my builds because of linker issues with stack. I now 
> have to specify "ghc-build: nopie" in stack.yaml file. (cf 
> https://github.com/commercialhaskell/stack/issues/2712)
>
> Could your error be related to PIE too?
>
Note that this (Trac #12759) was worked around in GHC 8.0.2 via a
autoconf check. Consequently, upgrading the your C toolchain may
require that you reinstall GHC.

Cheers,

- Ben
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