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

>From ec17a7a75911547b4567bb16fca72042abd105ff Mon Sep 17 00:00:00 2001
From: Louis Dionne <ldionn...@gmail.com>
Date: Thu, 25 Jul 2024 12:16:48 -0500
Subject: [PATCH] [libc++] Add missing xlocale.h include on Apple and FreeBSD
 (#99689)

The `<locale>` header uses `strtoll_l` and friends which are defined in
`<xlocale.h>` on these platforms. While this works via transitive
includes when modules are disabled, this doesn't work anymore if the
platforms are modularized properly.

(cherry picked from commit a55df237375e98cfc2520d5eb1a23b302ef02ba0)
---
 libcxx/include/locale | 4 ++++
 1 file changed, 4 insertions(+)

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

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