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python{39,310,311,312,313}: Allow using cc to resolve dynamic libraries #328943

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merged 1 commit into from
Aug 27, 2024

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rhelmot
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@rhelmot rhelmot commented Jul 21, 2024

Description of changes

This patch hasn't been complete since an alternate case was added to cpython 3.6 which allows using ld(1) to resolve libraries. In addition to this, the stated reason for the patch, to improve startup times by preventing cpython from invoking gcc to resolve libuuid, has not been an issue since that logic was removed in cpython 3.9. Finally, this patch creates a disparity between Linux and other operating systems (I am working on FreeBSD right now) since the ld(1) case is system gated.

Since it no longer accomplishes its stated purpose, is no longer needed, and creates platform disparities, we should remove it.

I've left the half of this patch which prevents /sbin/ldconfig from being invoked, since no nix-compiled program should ever be invoking absolute paths like this.

Things done

  • Built on platform(s)
    • x86_64-linux
    • aarch64-linux
    • x86_64-darwin
    • aarch64-darwin
    • x86_64-freebsd
  • 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/)
  • 24.11 Release Notes (or backporting 23.11 and 24.05 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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This patch hasn't been complete since an alternate case was added to
cpython which allows using ld(1) to resolve libraries. In addition to
this, the stated reason for the patch, to improve startup times by
preventing cpython from invoking gcc to resolve libuuid, has not been an
issue since that logic was removed in cpython 3.9. Finally, this patch
creates a disparity between Linux and other operating systems (I am
working on FreeBSD right now) since the ld(1) case is system gated.

Since it no longer accomplishes its stated purpose, is no longer needed,
and creates platform disparities, we should remove it.

I've left the half of this patch which prevents /sbin/ldconfig from
being invoked, since no nix-compiled program should ever be invoking
absolute paths like this.
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@Ericson2314 Ericson2314 left a comment

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Makes sense to me, but perhaps a Python maintainer should review it

@wegank wegank added the 12.approvals: 1 This PR was reviewed and approved by one reputable person label Aug 4, 2024
@natsukium
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The change looks fine to me.
I'm running python{39,310,311,312,313}.tests on x86_64-linux, aarch64-linux, x86_64-darwin and aarch64-darwin.

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@natsukium natsukium left a comment

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All tests passed. Thanks.

@natsukium natsukium merged commit 7ccd711 into NixOS:staging Aug 27, 2024
33 checks passed
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5 participants