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Add support for implicit include directories to rule-based toolchains
Reorients the `cc_toolchain.cxx_builtin_include_directories` attribute so it is expressed as an attribute on `cc_args` and `cc_tool` to signify that the tools or arguments imply include directories that Bazel's include path checker should allowlist. This moves the allowlist to the source of truth that implies these directories.
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PiperOrigin-RevId: 671393376
Change-Id: Ide8cae548783726835168adcd3f705028a1f4308
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Create a cc_directory_tool rule.
This should allow for easy definition of tools from the sysroot. For example:
cc_directory_tool(
name = "clang",
directory = "@sysroot//:sysroot",
executable = "usr/bin/clang",
)
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PiperOrigin-RevId: 639947945
Change-Id: I4c211eb9c0b5fdc6457d9d32ef9250b5384a4ef3
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Make toolchains use directory markers instead of strings.
You now refer to this instead of a string containing the repo mapped path.
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PiperOrigin-RevId: 639946886
Change-Id: I409be7b7002252b06562a2982a2568e79811877d
Implement cc_args.
Also change cc_flag_set / cc_flag_group to cc_args / cc_arg_group. This is to lean into the idea that this is roughly equivalent to ctx.actions.args()
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PiperOrigin-RevId: 608804069
Change-Id: I74ea883b14219f904aaafc4eab902b96a1fb3e3d
