[stable/21.x][CAS] gmodule support for caching build #11714
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Please test with: @swift-ci please test |
This was referenced Oct 28, 2025
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Please test with following PR: @swift-ci please test |
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Please test with following PR: @swift-ci please test |
Teach clang to encode CASID as splitDwarfFilename for gmodule when clang caching is enabled. This allows the outputs from compiler do not contain paths to the clang module files, thus allows distributed caching without the need of a unified clang module cache directory path.
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Teach dsymutil how to use CAS and how to load clang modules from CAS when building dSYM when gmodule is used.
Teach lldb to load clang modules when gmodule + clang caching is used.
Teach SwiftASTContext to load clang module dependencies from CAS instead of FileSystem.
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gmodule support by switching splitDwarf references to CASIDs of the module/PCH.
Also teach dsymutil to support reading from CAS as a prototype for lldb support.