[libcxx-commits] [libcxx] [AIX] cxx_std_23 is currently not a known feature to ibm-clang (PR #66952)

[David Tenty via libcxx-commits]

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@@ -81,7 +81,9 @@ add_library(               cxx-benchmarks-flags INTERFACE)
 # requesting `cxx_std_23` results in an error -- somehow CMake fails to
 # translate the `c++23` flag into `c++latest`, and the highest numbered C++
 # version that MSVC flags support is C++20.
-if (MSVC)
+# ibm-clang does not recognize the cxx_std_32 flag, so use this as a temporary
+# workaround on AIX as well.
+if (MSVC OR ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
   add_compile_options(/std:c++latest)
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daltenty wrote:

You probably want to specify a gcc/clang version of this flag in this case, otherwise it seems like we'll pass the msvc style version.

https://github.com/llvm/llvm-project/pull/66952