[5.6][build] Allow cross-compiling build-script products for non-Darwin hosts too #40525
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@gottesmm, can we can get this in before the 5.6 release? |
…sts too To that end, move the --cross-compile-deps-path flag from build-script-impl to a publicly documented build-script flag and use it for build-script products' library dependencies too. Generate a SPM destination JSON file that can be used both for cross-compiling these build-script products and by users for their own Swift packages. Also, add a native_toolchain_path() method, that uses a prebuilt toolchain if available, and pass an install prefix in to swift-driver and sourcekit-lsp.
…e new host_install_destdir()
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Closing since I was told only regressions or bugfixes wIll be accepted into the release branch after the release shipped, though I did submit this months prior. |
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Cherrypick of #36917
Explanation: This pull consists of a handful of
build-scriptchanges that enable cross-compiling later Pythonbuild-scriptproducts like SPM and swift-driver for non-Darwin hosts, just as is currently possible when cross-compiling the toolchain for macOS arm64, including generating a cross-compilation destination JSON config file to use with SPM for Android. Most of the pull is scoped to non-Darwin cross-compilation or specifically to Android, with the exception of some install prefix refactoring, because cross-compilation for non-Darwin hosts installs the toolchains separately under a directory named for each host.Scope: Since this is only build-related and mostly for non-Darwin cross-compilation, most is not even run on the CI, with the exception of the install prefix refactoring.
SR Issue: None
Risk: Almost none, only the simple install prefix changes even affect the normal host builds.
Testing: I've been using earlier versions of this pull for a while to cross-compile the toolchain for Android and recently added it to my Android CI so I can cross-compile SPM for Android with every trunk snapshot.
Reviewer: @gottesmm