[PATCH] D143075: BareMetal ToolChain multilib layering

[Michael Platings via Phabricator via cfe-commits]

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This enables layering baremetal multilibs on top of each other.
For example a multilib containing only a no-exceptions libc++ could be
layered on top of a multilib containing C libs. This avoids the need
to duplicate the C library for every libc++ variant.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D143075

Files:
  clang/lib/Driver/ToolChains/BareMetal.cpp
  clang/lib/Driver/ToolChains/BareMetal.h
  clang/test/Driver/Inputs/baremetal_multilib/multilib.yaml
  clang/test/Driver/baremetal-multilib.cpp

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