[gn] Remove unneeded MC dep from llvm-tblgen (details)
[gn] Remove unneeded MC dep from llvm-tblgen
Tablegen does not have link time dependencies on MC. Having llvm-tblgen depend on it causes it to be rebuilt in the gn build every time somebody touches any cpp file in llvm/lib/MC* or llvm/lib/DebugInfo/Codeview*. Touching tablegen invalidates most of the rest of the build, and re-running it takes a while. This is is annoying for me when swapping between branches that touch CodeView logic.
This dep was added to LLVMBuild.txt back in 2018, and presumably it was carried over into the gn build.