Request: change to ghc-7.10.3 settings

[alanz]

On ubuntu 16.10 and up, and debian testing, there is a linker problem under some circumstances:

https://ghc.haskell.org/trac/ghc/ticket/12147

This can be sorted out by changing the settings file for GHC 7.10.3 to

 ("C compiler flags", "-fno-PIE -fno-stack-protector -Wa,-mrelax-relocations=no"),

[borsboom]

Is there a set of GHC bindist ./configure options or environment variables that will achieve that?

[alanz]

I have not idea. I just edited the file directly, after some discussion on IRC in #ghc

[borsboom]

Stack should already be setting some no-pie options on Ubuntu 16.10 with GHC 7.10.3: https://github.com/fpco/stackage-content/blob/master/stack/stack-setup-2.yaml#L210

[alanz]

its not the no-pie, its the -Wa,-mrelax-relocations=no that is needed in this case.

[alanz]

In addition to the existing no-pie

[borsboom]

@alanz Do you think those should be applied to all no-pie distros, or is this Ubuntu 16.10/debian testing specific? I try to avoid adding more platform variations unless necessary as each one increases the maintenance and testing burden.

[alanz]

I would imagine so. The original thread discussing this noted it on Arch Linux and Ubuntu, and I hit it on Debian testing. It is the underlying binutils or whatever that are used everywhere.

See the whole thread at DanielG/ghc-mod#762 (comment)

[borsboom]

Can you try making a local copy of stack-setup-2.yaml, adjusting the configure options for the linux..-nopie variants as you see fit, and then use stack setup --stack-setup-yaml=<<PATH-TO-LOCAL-FILE>> to test it? You should move your current ~/.stack/programs out of the way first. If that works, please open a PR against the fpco/stackage-content repo with the changes.

[alanz]

I am travelling at the moment with bad connectivity. I will do this when I get back, early next week.

[decentral1se]

Any updates @alanz?

[mpilgrem]

I am closing this issue given the passage of time and because the master branch version of Stack does not support LTS < 12.0.