disable STL wchar_t functions (but keep the C headers)

Author: ZERICO2005

src/libcxx/header_test.cpp

@@ -171,10 +171,11 @@
 #include <variant>
 #include <vector>
 #include <version>
-#if !defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
+// We can still provide some of the functions in <wchar.h> without issues
+#if 1 || !defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
 #  include <wchar.h>
 #endif
-#if !defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
+#if 1 || !defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
 #  include <wctype.h>
 #endif
 

src/libcxx/include/__config_site

@@ -27,7 +27,7 @@
 #define _LIBCPP_HAS_NO_RANDOM_DEVICE
 #define _LIBCPP_HAS_NO_LOCALIZATION
 #define _LIBCPP_HAS_NO_UNICODE
-// #define _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#define _LIBCPP_HAS_NO_WIDE_CHARACTERS
 #define _LIBCPP_HAS_NO_STD_MODULES
 #define _LIBCPP_HAS_NO_TIME_ZONE_DATABASE
 // #define _LIBCPP_INSTRUMENTED_WITH_ASAN

src/libcxx/include/wchar.h

@@ -108,10 +108,12 @@ size_t wcsrtombs(char* restrict dst, const wchar_t** restrict src, size_t len,
 #  include <__config>
 #  include <stddef.h>
 
+#ifndef _EZ80
 #  if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
 #    error                                                                                                             \
         "The <wchar.h> header is not supported since libc++ has been configured with LIBCXX_ENABLE_WIDE_CHARACTERS disabled"
 #  endif
+#endif // _EZ80
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #    pragma GCC system_header

src/libcxx/include/wctype.h

@@ -46,10 +46,12 @@ wctrans_t wctrans(const char* property);
 
 #include <__config>
 
+#ifndef _EZ80
 #if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
 #  error                                                                                                               \
       "The <wctype.h> header is not supported since libc++ has been configured with LIBCXX_ENABLE_WIDE_CHARACTERS disabled"
 #endif
+#endif // _EZ80
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header