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f61e189ad3
nixpkgs/pkgs/stdenv/darwin
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Randy Eckenrode f61e189ad3
overrideSDK: support all deps attributes 
This is effectively a rewrite of `overrideSDK`. It was required because
`wrapGAppsHook` propagates `depsTargetTarget` with the expectation that
it will effectively be `buildInputs` when the hook is itself used as a
`nativeBuildInput`. This propagates Gtk, which itself propagates the
default Dariwn SDK, making it effectively impossible to override the SDK
when a package depends on Gtk and uses `wrapGAppsHook`.

This rewrite implements the following improvements:

* Cross-compilation should be supported correctly (untested);
* Supports public and private frameworks;
* Supports SDK `libs`;
* Remaps instead of replacing extra (native) build inputs in the stdenv;
* Updates any Darwin framework references in `nix-support`; and
* It updates `xcodebuild` regardless of which input its in.

The implementation avoids recursion for performance reasons. Instead, it
enumerates transitive dependencies and walks the list from the leaf
packages backwards to the parent packages.
2024-03-29 10:03:08 -04:00
..
bootstrap-files stdenv.darwin: bootstrap darwin using updated tools 2024-03-22 13:27:27 +00:00
default.nix darwin.stdenv: drop curl from assertions 2024-03-29 10:00:30 -04:00
make-bootstrap-tools.nix stdenv.darwin: bootstrap darwin using updated tools 2024-03-22 13:27:27 +00:00
override-sdk.nix overrideSDK: support all deps attributes 2024-03-29 10:03:08 -04:00
portable-libsystem.sh darwin.stdenv: only run install_name_tool on files 2023-07-08 20:49:50 -06:00
README.md darwin.stdenv: refactor stdenv definition 2023-07-02 17:56:24 -04:00

README.md

Darwin stdenv design goals

There are two more goals worth calling out explicitly:

  1. The standard environment should build successfully with sandboxing enabled on Darwin. It is fine if a package requires a sandboxProfile to build, but it should not be necessary to disable the sandbox to build the stdenv successfully; and
  2. The output should depend weakly on the bootstrap tools. Historically, Darwin required updating the bootstrap tools prior to updating the version of LLVM used in the standard environment. By not depending on a specific version, the LLVM used on Darwin can be updated simply by bumping the definition of llvmPackages in all-packages.nix.

Updating the stdenv

There are effectively two steps when updating the standard environment:

  1. Update the definition of llvmPackages in all-packages.nix for Darwin to match the value of llvmPackages.latest in all-packages.nix. Timing-wise, this done currently using the spring release of LLVM and once llvmPackages.latest has been updated to match. If the LLVM project has announced a release schedule of patch updates, wait until those are in nixpkgs. Otherwise, the LLVM updates will have to go through staging instead of being merged into master; and
  2. Fix the resulting breakage. Most things break due to additional warnings being turned into errors or additional strictness applied by LLVM. Fixes may come in the form of disabling those new warnings or by fixing the actual source (e.g., with a patch or update upstream). If the fix is trivial (e.g., adding a missing int to an implicit declaration), it is better to fix the problem instead of silencing the warning.