I'm not sure what was the compatibility problem before that commit,
but ghc at least builds now on both x86 Linux platforms
(and this commit doesn't cause a rebuild on x86_64-linux).
The name of the GHC derivation must match the name and version tuple GHC
uses to identify itself, because the withPackages wrapper uses that name
to construct installation library paths etc., and those paths must match
those constructed by the compiler. If we add another tag to the name
that GHC itself doesn't use, then the paths assumed to exist by the
wrapper are wrong.
The compiler should not expect to have dynamic versions of all libraries
available, because that configuration doesn't play along nicely with statically
linked libraries.
Fixes https://github.com/NixOS/nixpkgs/issues/6399.
These versions have been removed:
- 6.4.2-binary.nix
- 6.4.2.nix
- 6.6.1.nix
- 6.8.2.nix
- 6.8.3.nix
- 6.10.1-binary.nix
- 6.10.1.nix
- 6.10.2.nix
- 6.10.3.nix
- 6.11.nix
- 6.12.1-binary.nix
- 6.12.1.nix
- 6.12.2.nix
- 7.0.1.nix
- 7.0.2.nix
- 7.0.3.nix
- 7.2.1.nix
- 7.4.1.nix
- 7.6.1.nix
- 7.6.2.nix
- 7.8.3-binary.nix
As a rule of thumb, we keep the latest version in every major release. If
someone feels up to the task of fixing versions 6.4.x, 6.6.x, and 6.8.x, then
please don't hesitate to revive those builds.
Fixes https://github.com/NixOS/nixpkgs/issues/5630.
Originally, I thought that I can commit a "clean" patch -- even if it
triggers re-builds -- because those re-builds were triggered by the
ncurses patch to GHC anyway . That patch had to be reverted, though, so
now I'm rewriting this patch to avoid re-builds on Linux.
What a mess. :-(
I thought that [1] could be fixed by ensuring that ncurses is available in the
environment (because ghc exports it as a propagateBuildInput), and indeed that
change fixed *some* build failures we've had before. However, the same error
still occurs with other packages, like hledger [2] and Agda [3]. Frankly, I
have no idea why those packages fail and others don't. But clearly the fix was
inadequate, so I'm reverting commit a8076c76.
[1] https://github.com/NixOS/nixpkgs/issues/5616
[2] http://hydra.cryp.to/build/372451/nixlog/1/raw
[2] http://hydra.cryp.to/build/373161/nixlog/1/raw
Hydra generates a GHC closure for Darwin that for no apparent reason
contains an ancient, broken Haddock binary -- probably because of an
impurity in the build system. That bug makes those GHC binaries
unusable: <https://github.com/NixOS/nixpkgs/issues/2689>.
rts/StgCRun.c: In function 'StgRunIsImplementedInAssembler':
rts/StgCRun.c:208:1:
error: frame pointer required, but reserved
StgRunIsImplementedInAssembler(void)
^
In file included from includes/Stg.h:230:0:
0,
from rts/StgCRun.c:70:
includes/stg/Regs.h:323:20:
note: for 'Sp'
GLOBAL_REG_DECL(P_,Sp,REG_Sp)
^
includes/stg/Regs.h:174:54:
note: in definition of macro 'GLOBAL_REG_DECL'
#define GLOBAL_REG_DECL(type,name,reg) register type name REG(reg);
^
In this case, we also need to specify compilation flags to mark stacks as
non-executable, otherwise PaX will not allow ghc or binaries built by ghc
to run. This is what gentoo-hardened does as well.
It sucks, I know, but GHC just doesn't compile reliably when built with
some -j<n> option. :-( We have build errors because of apparent race
conditions all over the place on Hydra. This causes so much trouble for
users that it's not worth keeping this option enabled, IMHO.
1) The wrapper erroneously used the ghc-pkg flag "--package-db" instead of
"--global-package-db". The result was that packages installed locally in
~/.ghc and ~/.cabal were invisible to GHC. This has been fixed.
2) The wrapper now deals gracefully with an empty package set: if no package
is requested to be included in the wrapped environment, the wrapper just
installs a pristine GHC.
3) Correctly configure the "docdir" path returned by ghc-paths.
4) Added some comments that describe the idea behind our ghc-paths patches and
gives users same sample shell code that can be used to import our special
environment variables into the currently running shell, so that programs
outside of the wrapped environment can use them, too.
The ghcWithPackage expression now has an argument 'ignoreCollisions' that
allows users to disable the path collision check like so:
(pkgs.haskellPackages.ghcWithPackages (pkgs: with pkgs; [ haskellPlatform ])).override { ignoreCollisions = true; };
See d64917ad17
for a long and detailed discussion of why these path collisions may occur.
Haskell packages -- i.e. packages built by our Cabal builder -- invariably have
the attributes 'pname' and 'version'. We use the absence of these attributes to
recognize non-Haskell packages and filter them from the closed package set
generated by closePropagation. We do this so that the generated Haskell
environment won't contain paths like "/lib/libz.a", which are part of the
closure but have nothing to do with Haskell.
The previous scheme used the attribute 'ghc' to accomplish the same thing, but
unfortunately other packages to contain a 'ghc' attribute, too, like the
old-style ghc-wrapper. Including the ghc-wrapper in this environment is
pointless, obviously. The new approach filters the ghc-wrapper successfully.
