cmake: Prevent it from looking for packages in / when cross-compiling for Windows. #25330
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when cross-compiling for Windows.
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@DavidEGrayson, thanks for your PR! By analyzing the history of the files in this pull request, we identified @7c6f434c, @abbradar and @dtzWill to be potential reviewers. |
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Thanks! |
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This pull request is for the staging branch because it will cause a mass rebuild.
I was using the CMake from nixpkgs in my own project (outside of nixpkgs) to cross-compile some software for Windows. That software uses the
find_packagecommand to find Qt5Widgets. CMake was finding the Qt5Widgets package on my build system in/lib/cmakeand trying (unsuccessfully) to use it. Obviously, that goes against the whole point of purity in Nix. This pull request adds a patch that comments out a line that adds/to theCMAKE_SYSTEM_PREFIX_PATH. Thanks!Motivation for this change
Things done
(nix.useSandbox on NixOS,
or option
build-use-sandboxinnix.confon non-NixOS)
nix-shell -p nox --run "nox-review wip"./result/bin/)