GitLab

The splitter is an evil Perl script that processes assembler code.
Its job can be done better by the linker's --gc-sections flag. GHC
passes this flag to the linker whenever -split-sections is passed on
the command line.

This is based on @DemiMarie's D2768.

Fixes Trac #11315
Fixes Trac #9832
Fixes Trac #8964
Fixes Trac #8685
Fixes Trac #8629

Summary: I'm currently trying to make `hadrian` work as a build system
on FreeBSD (https://ghc.haskell.org/trac/ghc/ticket/15860).
I'm still having some issues with `libgmp` but one can get a working
`ghc` using `--integer-simple` and this patch.

Reviewers: bgamari, erikd, alpmestan

Reviewed By: alpmestan

Subscribers: rwbarton, carter

Differential Revision: https://phabricator.haskell.org/D5335

Summary:
GHC 8.6.1 is out, so now GHC's support window only extends
back to GHC 8.4. This means we can delete gobs of code that were
only used for GHC 8.2 support. Hooray!

Test Plan: ./validate

Reviewers: bgamari, Phyx, erikd

Reviewed By: bgamari, Phyx

Subscribers: rwbarton, erikd, carter

Differential Revision: https://phabricator.haskell.org/D5192

Summary:
This completes the work started in D4227 by using just 'getExecutablePath'
in ghc and ghc-pkg when building with base >= 4.11.0.

On the long term, we will be able to simply kill the existing code that
follows (or not) symlinks and just get this behaviour for free from
getExecutable. For now we however have to require base >= 4.11.0 to be able
to just use getExecutablePath under Windows, and use the current code when
building with an older base.

Original code by @alpmestan commandeering since patch has been stale
and bug remains open.

Test Plan: Validate

Reviewers: angerman, bgamari, erikd, alpmestan

Reviewed By: bgamari

Subscribers: carter, rwbarton, thomie

GHC Trac Issues: #14483

Differential Revision: https://phabricator.haskell.org/D4229

This change was previously part of
[D4904](https://phabricator.haskell.org/D4904), but is being split off
to aid in getting this reviewed and merged.

* The compiler code is built with `NoImplicitPrelude`, but GHCi's
  modules are incompatible with it. So, this adds the pragma to all GHCi
  modules that didn't have it, and adds imports of Prelude.

* In order to run GHC within itself, a `call of 'initGCStatistics`
  needed to be skipped. This uses CPP to skip it when
  `-DGHC_LOADED_INTO_GHCI` is set.

* There is an environment variable workaround suggested by Ben Gamari
  [1], where `_GHC_TOP_DIR` can be used to specify GHC's top dir if `-B`
  isn't provided.  This can be used to solve a problem where the GHC being
  run within GHCi attempts to look in `inplace/lib/lib/` instead of
  `inplace/lib/`.

[1]: https://phabricator.haskell.org/D4904#135438

Reviewers: goldfire, bgamari, erikd, alpmestan

Reviewed By: alpmestan

Subscribers: alpmestan, lelf, rwbarton, thomie, carter

Differential Revision: https://phabricator.haskell.org/D4986

Summary:
This patch affects several files that affect how we detect mingw and perl
on Windows. The initial motivation is:

    https://github.com/snowleopard/hadrian/issues/564

where, with Hadrian building relocatable (non-inplace) GHCs, the current
detection mechanism falls short by e.g only trying $topdir/../mingw. But
in Hadrian, for reasons given in that issue, we would need to store e.g mingw
under $topdir/../../mingw except for binary distributions, where we want
to follow the existing structure, in which case $topdir/../mingw is correct. So
we need to support both, which is what this patch hopefully implements.

Test Plan: ./validate

Reviewers: Phyx, hvr, bgamari, erikd

Reviewed By: Phyx

Subscribers: snowleopard, thomie, carter

Differential Revision: https://phabricator.haskell.org/D4598

GHC 8.4.1 is out, so now GHC's support window only extends
back to GHC 8.2. This means we can delete gobs of code that were
only used for GHC 8.0 support. Hooray!

Test Plan: ./validate

Reviewers: bgamari, erikd, dfeuer

Reviewed By: bgamari, dfeuer

Subscribers: alexbiehl, dfeuer, rwbarton, thomie, carter

Differential Revision: https://phabricator.haskell.org/D4492

On Windows GHC enforces currently that the real executable is named
ghc.exe/ghc-stage[123].exe.

I don't see a good reason why this is neccessary.
This patch removes this restriction and fixes #14652

Test Plan: ci

Reviewers: bgamari, Phyx

Reviewed By: Phyx

Subscribers: Phyx, rwbarton, thomie, carter

GHC Trac Issues: #14652

Differential Revision: https://phabricator.haskell.org/D4296

Test Plan: Validate on Linux and Windows

Reviewers: erikd

Subscribers: rwbarton, thomie

Differential Revision: https://phabricator.haskell.org/D4225