cc_toolchain: prefix include directories with %workspace%
#438
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Today the
built_in_includes_directores
that are exported by this toolchain, appear to be incorrect. For example, when usingtoolchains_llvm
locally with clang 18.1.8 one of the includes paths is:This path does not exist, it's incorrectly prefixed with
external/llvm_toolchain/
. This is because when populating the list ofbuilt_in_includes_directories
Bazel will resolve the included directory based on these rules. Specifically the rule we're hitting today, and the cause of the invalid prefixing is:This PR changes the includes paths to be prefixed with
%workspace%
so instead no prefix is added.