[llvm-branch-commits] [libcxx] release/19.x: [libc++] Add missing xlocale.h include on Apple and FreeBSD (#99689) (PR #100604)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libcxx

Author: None (llvmbot)

<details>
<summary>Changes</summary>

Backport a55df237375e98cfc2520d5eb1a23b302ef02ba0

Requested by: @<!-- -->ldionne

---
Full diff: https://github.com/llvm/llvm-project/pull/100604.diff


1 Files Affected:

- (modified) libcxx/include/locale (+4) 


``````````diff
diff --git a/libcxx/include/locale b/libcxx/include/locale
index dbec23a2c936d..573910a85bef5 100644
--- a/libcxx/include/locale
+++ b/libcxx/include/locale
@@ -232,6 +232,10 @@ template <class charT> class messages_byname;
 #    include <__locale_dir/locale_base_api/bsd_locale_fallbacks.h>
 #  endif
 
+#  if defined(__APPLE__) || defined(__FreeBSD__)
+#    include <xlocale.h>
+#  endif
+
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #    pragma GCC system_header
 #  endif

``````````

</details>


https://github.com/llvm/llvm-project/pull/100604