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cxxopts: set C++ std to 17 to fix building with icu4c-76.1 #384606

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Fixes a build failure in cxxopts-3.2.1 caused by incompatibility with icu4c-76.1, which requires at least C++14 due to its use of std::u16string_view. The default C++ standard was C++11, leading to compilation errors.
Closes #384561

Things done

  • Built on platform(s)
    • x86_64-linux
    • aarch64-linux
    • x86_64-darwin
    • aarch64-darwin
  • For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
    • sandbox = relaxed
    • sandbox = true
  • Tested, as applicable:
  • Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
  • Tested basic functionality of all binary files (usually in ./result/bin/)
  • 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
    • (Package updates) Added a release notes entry if the change is major or breaking
    • (Module updates) Added a release notes entry if the change is significant
    • (Module addition) Added a release notes entry if adding a new NixOS module
  • Fits CONTRIBUTING.md.

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@3ulalia
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3ulalia commented Feb 23, 2025

format checks 😭 otherwise should be fine

@NixOSInfra NixOSInfra added the 12. first-time contribution This PR is the author's first one; please be gentle! label Feb 23, 2025
@builtbyvys
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yep, completely forgot to run that before PR'ing lol

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Build failure: cxxopts-3.2.1
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