Build failure: qt6.qtmultimedia mingw hostPlatform

[seanybaggins]

Steps To Reproduce

Steps to reproduce the behavior:

1. build qt6.qtmultimedia for mingw (windows) hostPlatform

nix-build -A 'pkgs.pkgsCross.mingw32.qt6.qtmultimedia'

Build log

error:
       … in the condition of the assert statement

         at /home/sean/nixpkgs-contributing/lib/customisation.nix:263:17:

          262|     in commonAttrs // {
          263|       drvPath = assert condition; drv.drvPath;
             |                 ^
          264|       outPath = assert condition; drv.outPath;

       … while evaluating the attribute 'handled'

         at /home/sean/nixpkgs-contributing/pkgs/stdenv/generic/check-meta.nix:499:7:

          498|       # or, alternatively, just output a warning message.
          499|       handled =
             |       ^
          500|         (

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: Package ‘qtmultimedia-6.6.1’ in /home/sean/nixpkgs-contributing/pkgs/development/libraries/qt-6/qtModule.nix:37 is not available on the requested hostPlatform:
         hostPlatform.config = "i686-w64-mingw32"
         package.meta.platforms = [
           "i686-cygwin"
           "x86_64-cygwin"
           "x86_64-darwin"
           "i686-darwin"
           "aarch64-darwin"
           "armv7a-darwin"
           "i686-freebsd13"
           "x86_64-freebsd13"
           "x86_64-solaris"
           "aarch64-linux"
           "armv5tel-linux"
           "armv6l-linux"
           "armv7a-linux"
           "armv7l-linux"
           "i686-linux"
           "loongarch64-linux"
           "m68k-linux"
           "microblaze-linux"
           "microblazeel-linux"
           "mips-linux"
           "mips64-linux"
           "mips64el-linux"
           "mipsel-linux"
           "powerpc64-linux"
           "powerpc64le-linux"
           "riscv32-linux"
           "riscv64-linux"
           "s390-linux"
           "s390x-linux"
           "x86_64-linux"
           "aarch64-netbsd"
           "armv6l-netbsd"
           "armv7a-netbsd"
           "armv7l-netbsd"
           "i686-netbsd"
           "m68k-netbsd"
           "mipsel-netbsd"
           "powerpc-netbsd"
           "riscv32-netbsd"
           "riscv64-netbsd"
           "x86_64-netbsd"
           "i686-openbsd"
           "x86_64-openbsd"
           "x86_64-redox"
         ]
         package.meta.badPlatforms = [ ]
       , refusing to evaluate.

       a) To temporarily allow packages that are unsupported for this system, you can use an environment variable
          for a single invocation of the nix tools.

            $ export NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1

          Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake,
                then pass `--impure` in order to allow use of environment variables.

       b) For `nixos-rebuild` you can set
         { nixpkgs.config.allowUnsupportedSystem = true; }
       in configuration.nix to override this.

       c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
         { allowUnsupportedSystem = true; }
       to ~/.config/nixpkgs/config.nix.

Additional context

I am slowly adding mingw support for qt6.qtmultimedia. Will reference this issue when I open a PR for a cross build dependency. May open some drafts in a effort to get help from the community.

Here is an image of the dependency tree from msys2.

Notify maintainers

@milahu @NickCao @LunNova

Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
output here

---

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[seanybaggins]

Upstreaming my changes to nixpkgs is taking longer than I expected. Here is the publication of my overlays. Hopefully other members of the community can help me upstream these packages to get qtbase and qtmultimedia cross compiling.
https://github.com/seanybaggins/qt-package-overalys

[seanybaggins]

nix build "github:nixos/nixpkgs/e07f1962864dd6df9944972366cc33888126d590#pkgs.pkgsCross.mingw32.qt6.qtmultimedia"

Builds qt6.qtmultimedia for mingw32. Thank you @Artturin, @bjornfor, @NickCao, @wegank, @SuperSandro2000, @ajs124, @Ericson2314, @alyssais, @L-as, @LunNova, @afh, @delroth, @AndersonTorres, @Mindavi, @vcunat, @jopejoe1, @Atemu, @arthsmn, @symphorien, @superherointj, and anyone else I forgot to mention, for helping with reviews. My experience of contributing to nixpkgs was very positive, and it's thanks to all you incredibly bright and generous people.

Closing as resolved.

[afh]

Thank you for putting in all the hard work, @seanybaggins, very much appreciated! 👏