From 65f29a73448564ad120168fbfd7f4e76ef63f4f6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Fri, 2 Oct 2026 04:16:43 +0200
Subject: [PATCH] libcxx: fix OpenBSD build failure due to missing
 __get_locale_encoding()

https://github.com/llvm/llvm-project/pull/228306
---
 lib/libcxx/include/__locale_dir/support/openbsd.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/libcxx/include/__locale_dir/support/openbsd.h b/lib/libcxx/include/__locale_dir/support/openbsd.h
index 0ec5b12f2ebdde33772c303d0390d9f9dfa053f5..1fcae994b3aaef3e012397412b3ed8a5f49817fa 100644
--- a/lib/libcxx/include/__locale_dir/support/openbsd.h
+++ b/lib/libcxx/include/__locale_dir/support/openbsd.h
@@ -24,6 +24,9 @@
 #  include <wchar.h>
 #  include <wctype.h>
 #endif
+#if defined(_LIBCPP_BUILDING_LIBRARY)
+#  include <langinfo.h>
+#endif
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -74,6 +77,10 @@ inline __lconv_t* __localeconv(__locale_t& __loc) {
   __locale_guard __current(__loc);
   return ::localeconv();
 }
+
+inline _LIBCPP_HIDE_FROM_ABI const char* __get_locale_encoding(__locale_t __loc) {
+    return ::nl_langinfo_l(CODESET, __loc);
+}
 #endif // _LIBCPP_BUILDING_LIBRARY
 
 //
-- 
2.54.0