[libcxx-commits] [libcxx] [libc++] Fix C++23 standard modules when using with `clang-cl` on Windows (PR #148992)

[A. Jiang via libcxx-commits]

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@@ -14,15 +14,17 @@ export {
 
   using ::timespec _LIBCPP_USING_IF_EXISTS;
   using ::tm _LIBCPP_USING_IF_EXISTS;
-
   using ::asctime _LIBCPP_USING_IF_EXISTS;
   using ::clock _LIBCPP_USING_IF_EXISTS;
+  using ::strftime _LIBCPP_USING_IF_EXISTS;
+
+#ifndef _LIBCPP_ABI_VCRUNTIME
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frederick-vs-ja wrote:

The issue on `<ctime>` these functions is that UCRT incorrectly adds `static` to them, so we can't directly `export` them. At this time we might simply skip `export` for them to make the standard modules buildable. MSVC STL chooses to reimplement them in the `std` namespace as a workaround.

https://github.com/llvm/llvm-project/pull/148992