From 1eb90b9a4e8fa2fbaea71c813b38080b28f66c69 Mon Sep 17 00:00:00 2001
From: Mark de Wever <koraq@xs4all.nl>
Date: Thu, 17 Aug 2023 18:54:22 +0200
Subject: [PATCH] [libc++] Fixes disabling wide character.

While testing the std module with -DLIBCXX_ENABLE_WIDE_CHARACTERS=OFF
the build failed. These functions are not exported from the module since
they use wchar_t. Disable them in the headers too.

Reviewed By: #libc, philnik

Differential Revision: https://reviews.llvm.org/D158199
---
 libcxx/include/cstdlib | 2 ++
 libcxx/include/iosfwd  | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/libcxx/include/cstdlib b/libcxx/include/cstdlib
index ab2c159c7259..9bf0ea3f73b1 100644
--- a/libcxx/include/cstdlib
+++ b/libcxx/include/cstdlib
@@ -136,10 +136,12 @@ using ::div _LIBCPP_USING_IF_EXISTS;
 using ::ldiv _LIBCPP_USING_IF_EXISTS;
 using ::lldiv _LIBCPP_USING_IF_EXISTS;
 using ::mblen _LIBCPP_USING_IF_EXISTS;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 using ::mbtowc _LIBCPP_USING_IF_EXISTS;
 using ::wctomb _LIBCPP_USING_IF_EXISTS;
 using ::mbstowcs _LIBCPP_USING_IF_EXISTS;
 using ::wcstombs _LIBCPP_USING_IF_EXISTS;
+#endif
 #if !defined(_LIBCPP_CXX03_LANG)
 using ::at_quick_exit _LIBCPP_USING_IF_EXISTS;
 using ::quick_exit _LIBCPP_USING_IF_EXISTS;
diff --git a/libcxx/include/iosfwd b/libcxx/include/iosfwd
index ea1a8c0ec372..dbbf7fdaf6de 100644
--- a/libcxx/include/iosfwd
+++ b/libcxx/include/iosfwd
@@ -121,7 +121,9 @@ template <class _CharT, class _Traits = char_traits<_CharT> >
 
 template <class _State>             class _LIBCPP_TEMPLATE_VIS fpos;
 typedef fpos<mbstate_t>    streampos;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 typedef fpos<mbstate_t>    wstreampos;
+#endif
 #ifndef _LIBCPP_HAS_NO_CHAR8_T
 typedef fpos<mbstate_t>    u8streampos;
 #endif