[Stdlib][Build] Fix the standard library build for fully static Linux. #73488
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Use the new `SWIFT_SDK_<sdk>_STATIC_LINKING_SUPPORTED` and `_STATIC_ONLY` flags instead of hardcoding support for Linux and WASI. Also, use the `_LIB_SUBDIR` variable rather than lowercasing the SDK. rdar://123504757
This is really just about setting appropriate defaults (such as making sure that the static Linux triple causes us to use lld). rdar://123506306
We only need this for WASI and Glibc. rdar://123506306
The backtracer and its build system need a couple of changes to make them work with the new fully-static Linux support. rdar://123507656
Mostly this just means adding `Musl` as a module dependency of various things and making sure that we build things for `swift_static` even if `SWIFT_BUILD_STATIC_STDLIB` isn't enabled. There's also a slight difference in the declaration of `memcmp()`; musl's declaration is more like the one we have on Darwin. rdar://123508245
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@swift-ci Please test |
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Explanation: This updates the standard library build to support the new static Linux SDK. |
DougGregor
approved these changes
May 7, 2024
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Mostly this just means adding
Muslas a module dependency of various things and making sure that we build things forswift_staticeven ifSWIFT_BUILD_STATIC_STDLIBisn't enabled.There's also a slight difference in the declaration of
memcmp(); musl's declaration is more like the one we have on Darwin.rdar://123508245