`Error: Setup: Encountered missing or private dependencies: system-cxx-std-lib ==1.0` when trying to build `double-conversion` about haskell.nix HOT 8 CLOSED

Yes. It's GHC c++ routing library so that the rest of the ecosystem doesn't need to deal with figuring out how to link c++.

I believe this is with ghc961?

from haskell.nix.

It looks like it was with ghc 9.4.5 based on the configure flags.

double-conversion.cabal 2.0.4.2 has:

  if impl(ghc >= 9.4)
    build-depends: system-cxx-std-lib == 1.0

I can't reproduce the issue building the double-conversion library though. For instance with:

nix-build  -E '((import ./. {}).pkgs-unstable.haskell-nix.hackage-package { compiler-nix-name = "ghc945"; name = "double-conversion"; }).components.library'

It looks like somehow the --dependency args in your output are strangly missing --dependency=system-cxx-std-lib=system-cxx-std-lib-1.0. It is also odd that --dependency=exceptions=exceptions-0.10.5 and --dependency=stm=stm-2.5.1.0 are included when they are not needed.

Do you have any modules that change nonReinstallablePkg or bootPkgs?

from haskell.nix.

@hamishmack is right, this is GHC 9.4. We also do specify nonReinstallablePkgs, here's the relevant module for that:

      {
        # https://github.com/input-output-hk/haskell.nix/issues/1809#issuecomment-1358469589
        reinstallableLibGhc = false;
        nonReinstallablePkgs =
          [
            "rts"
            "ghc-heap"
            "ghc-prim"
            "integer-gmp"
            "integer-simple"
            "base"
            "deepseq"
            "array"
            "ghc-boot-th"
            "pretty"
            "template-haskell"
            "ghc-boot"
            "ghc"
            "Win32"
            "array"
            "binary"
            "bytestring"
            "containers"
            "directory"
            "filepath"
            "ghc-boot"
            "ghc-compact"
            "ghc-prim"
            "hpc"
            "mtl"
            "parsec"
            "process"
            "text"
            "time"
            "transformers"
            "unix"
            "xhtml"
            "ghc-bignum"
            # package ghc-9.4.3 is unusable due to missing dependencies:
            # exceptions-0.10.5 stm-2.5.1.0 terminfo-0.4.1.5
            "stm"
            "exceptions"
            "terminfo"
            #
          ];
      }

from haskell.nix.

Ok, it looks like adding "system-cxx-std-lib" to nonReinstallablePkgs was all I needed to do. Shall we close this?

from haskell.nix.

Actually now that reinstallableLibGhc = true is the default, I think we can be more aggressive making nonReinstallablePkgs when it is false include the full set of packages needed by ghc. I think that means adding:

• exceptions (ghc >=9.0.1)
• stm (ghc >=9.0.1)
• system-cxx-std-lib (ghc >=9.4.1)

We have been reluctant to change this in the past because reinstallableLibGhc = false was the default and having these packages pinned to the version that comes with GHC might have been a confusing change for people not building ghc packages (see #1183).

from haskell.nix.

What breaks if you remove that whole module (setting reinstallableLibGhc = false and nonReinstallablePkgs = ...)?

from haskell.nix.

I have merged #1941 so we should not need to include nonReinstallablePkgs now. Just { reinstallableLibGhc = false; } should cause all the packages required by ghc to be included in nonReinstallablePkgs.

from haskell.nix.

Yea, just specifying reinstallableLibGhc = false has sorted it now. Thanks!

from haskell.nix.