build: add Source Link to embed GitHub source mappings in PDBs#40055
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build: add Source Link to embed GitHub source mappings in PDBs#40055
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benhillis
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craigloewen-msft,
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jstarks
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Pull request overview
Adds Source Link support to the Windows CMake build so generated PDBs can map local source paths to GitHub URLs, enabling debuggers to fetch exact source files for a given commit.
Changes:
- Generate a
sourcelink.jsonfile during CMake configure with document mappings toraw.githubusercontent.comfor the currentCOMMIT_HASH. - Pass
/SOURCELINK:<json>to the MSVC linker for DLL and EXE targets.
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When a debugger (Visual Studio, WinDbg, VS Code) loads a PDB and needs to show source, it reads this mapping, substitutes the local build path with the URL, and fetches the exact source file from the server.