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[Linux] (Cherry Pick) Merge pull request #64312 from gwynne/patch-2 #64633

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merged 1 commit into from
Mar 30, 2023

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@al45tair al45tair commented Mar 27, 2023

Add the remaining toolchain-distributed runtime libs to autolink-extract. Cherry-pick of #64312.

Add the remaining toolchain-distributed runtime libs to autolink-extract
@al45tair al45tair requested a review from a team as a code owner March 27, 2023 08:36
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@swift-ci Please smoke test

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@swift-ci Please test

@al45tair al45tair merged commit ba6bed1 into swiftlang:release/5.9 Mar 30, 2023
@AnthonyLatsis AnthonyLatsis added the 🍒 release cherry pick Flag: Release branch cherry picks label May 3, 2023
MaxDesiatov added a commit that referenced this pull request Jun 1, 2023
[5.8] CMake: fix missing `SWIFT_CONCURRENCY_GLOBAL_EXECUTOR`

Explanation: Resolves issues with static linking on Linux
Risk: Medium, affects Linux builds and top-level CMake declarations.
Original PRs: #65795 and #64312 for `main`, #65824 and #64633 for `release/5.9`
Reviewed by: @al45tair @drexin @etcwilde 
Resolves: some of the issues reported in #65097, also resolves #58380
Tests: Added in swiftlang/swift-integration-tests#118

`SWIFT_CONCURRENCY_GLOBAL_EXECUTOR` is defined in `stdlib/cmake/modules/StdlibOptions.cmake`, which is not included during the first pass of evaluation of the root `CMakeLists.txt`. It is available on subsequent evaluations after the value is stored in CMake cache. This led to subtle bugs, where `usr/lib/swift_static/linux/static-stdlib-args.lnk` didn't contain certain flags on clean toolchain builds, but did contain them in incremental builds.

Not having these autolinking flags in toolchain builds leads to errors when statically linking executables on Linux.

Additionally, since our trivial lit tests previously didn't link Dispatch statically, they didn't expose a bug where `%import-static-libdispatch` substitution had a missing value. To fix that I had to update `lit.cfg` and clean up some of the related path computations to infer a correct substitution value.
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