[llvm-branch-commits] [libcxx] [llvm] [libc++][C++03] Use `__cxx03/` headers in C++03 mode (PR #109002)

[Louis Dionne via llvm-branch-commits]

================
@@ -0,0 +1,2 @@
+set(LIBCXX_TEST_PARAMS "std=c++03;test-cxx03-headers=True" CACHE STRING "")
----------------
ldionne wrote:

I would probably name this new param `use-frozen-cxx03-headers`. That tells what the setting does a bit more explicitly.

https://github.com/llvm/llvm-project/pull/109002