[all-commits] [llvm/llvm-project] 999884: Remove .. from clang resource path when specified ...

[rgal via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 99988429d395e95a8f994c5307371911145d2c1d
      https://github.com/llvm/llvm-project/commit/99988429d395e95a8f994c5307371911145d2c1d
  Author: rgal <russell.gallop at sony.com>
  Date:   2026-09-22 (Tue, 22 Sep 2026)

  Changed paths:
    M clang/lib/Options/OptionUtils.cpp
    A clang/test/Driver/ps4-ps5-resource-path.cpp

  Log Message:
  -----------
  Remove .. from clang resource path when specified with CLANG_RESOURCE_DIR  (#216996)

As discussed here:
https://discourse.llvm.org/t/removing-clang-version-number-from-resource-dir-in-a-distribution/90234

If a distributor wishes to have stable include paths across LLVM
versions, then they can build with `CLANG_RESOURCE_DIR=../lib/clang`.
This results in a slightly untidy include path (E.g.`C:\Program
Files\LLVM\bin\..\lib\clang\include`). This removes the ".." to make it
`C:\Program Files\LLVM\lib\clang\include` in this configuration.

Also added test. This uses "SIE" vendor. Since
https://github.com/llvm/llvm-zorg/commit/eac6791821f5104eb4c2b32f39ef5d20cda535a9,
PS4 and PS5 buildbots use this configuration and define the vendor so
the lack of version number and ".." should be tested on at least these
buildbots.



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