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| author | Peter Simons <simons@cryp.to> | 2014-08-16 17:42:11 +0200 |
|---|---|---|
| committer | Peter Simons <simons@cryp.to> | 2014-11-07 23:22:27 +0100 |
| commit | 44273088ad7980092ee18df2b116fcdea8911777 (patch) | |
| tree | e1efe15c285306dfbb38072f1d80b5e0f1931773 /pkgs/build-support/cabal | |
| parent | 1a8b7b6a12b066537a0cd8eeb5933fab2b8bc6f5 (diff) | |
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cabal: enable multi-threaded builds with GHC 7.8.x or later for executables
Multi-threaded builds exacerbate the non-determinism in ghc package ids, which is a serious problem for libraries. Packages that define only executables, however, should be safe to build with parallelism enabled.
Diffstat (limited to 'pkgs/build-support/cabal')
| -rw-r--r-- | pkgs/build-support/cabal/default.nix | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/pkgs/build-support/cabal/default.nix b/pkgs/build-support/cabal/default.nix index e9a8a50774c..467b0d155e7 100644 --- a/pkgs/build-support/cabal/default.nix +++ b/pkgs/build-support/cabal/default.nix @@ -217,6 +217,9 @@ assert !enableStaticLibraries -> versionOlder "7.7" ghc.version; ${optionalString (self.enableSharedExecutables && self.stdenv.isDarwin) '' configureFlags+=" --ghc-option=-optl=-Wl,-headerpad_max_install_names" ''} + ${optionalString (versionOlder "7.8" ghc.version && !self.isLibrary) '' + configureFlags+=" --ghc-option=-j$NIX_BUILD_CORES" + ''} echo "configure flags: $extraConfigureFlags $configureFlags" ./Setup configure --verbose --prefix="$out" --libdir='$prefix/lib/$compiler' \ |