Add some random junk to headers to make some things not complain. (You'll get linker errors if you try to use any of it, of course)

waterbox/libc/functions/ctype/isascii.c

@@ -0,0 +1,6 @@
+#include <ctype.h>
+
+int isascii(int c)
+{
+	return (unsigned)c < 128;
+}

waterbox/libc/includes/ctype.h

@@ -93,6 +93,9 @@ int tolower( int c ) _PDCLIB_nothrow;
 */
 int toupper( int c ) _PDCLIB_nothrow;
 
+/* returns true for c in [0, 127] */
+int isascii(int c) _PDCLIB_nothrow;
+
 #ifdef __cplusplus
 }
 #endif

waterbox/libc/includes/locale.h

@@ -78,6 +78,9 @@ struct lconv
 /* Time formats (strftime(), wcsftime()) */
 #define LC_TIME     4
 
+/* not supported! */
+#define LC_MESSAGES 5
+
 /* The category parameter can be any of the LC_* macros to specify if the call
    to setlocale() shall affect the entire locale or only a portion thereof.
    The category locale specifies which locale should be switched to, with "C"
@@ -99,8 +102,9 @@ struct lconv * localeconv( void ) _PDCLIB_nothrow;
 #define LC_MONETARY_MASK (1 << LC_MONETARY)
 #define LC_NUMERIC_MASK  (1 << LC_NUMERIC)
 #define LC_TIME_MASK     (1 << LC_TIME)
+#define LC_MESSAGES_MASK (1 << LC_MESSAGES)
 #define LC_ALL_MASK      (LC_COLLATE_MASK | LC_CTYPE_MASK | LC_MONETARY_MASK | \
-                          LC_NUMERIC_MASK | LC_TIME_MASK)
+                          LC_NUMERIC_MASK | LC_TIME_MASK | LC_MESSAGES_MASK)
 
 
 /* POSIX locale type */

waterbox/libc/includes/wchar.h

@@ -77,9 +77,7 @@ wchar_t * wmemchr( const wchar_t * s, wchar_t c, size_t n );
 size_t wcslen( const wchar_t * s );
 wchar_t * wmemset( wchar_t * s, wchar_t c, size_t n );
 
-#if 0
 size_t wcsftime( wchar_t * _PDCLIB_restrict s, size_t maxsize, const wchar_t * _PDCLIB_restrict format, const struct tm * _PDCLIB_restrict timeptr );
-#endif
 
 /* Wide character I/O */
 int fwprintf( _PDCLIB_file_t * _PDCLIB_restrict stream, const wchar_t * _PDCLIB_restrict format, ... );
@@ -118,11 +116,9 @@ int fputws_unlocked( const wchar_t * ws, _PDCLIB_file_t * stream );
 
 /* Wide character <-> Numeric conversions */
 
-/*
 double wcstod( const wchar_t * _PDCLIB_restrict nptr, wchar_t * * _PDCLIB_restrict endptr );
 float wcstof( const wchar_t * _PDCLIB_restrict nptr, wchar_t * * _PDCLIB_restrict endptr );
 long double wcstold( const wchar_t * _PDCLIB_restrict nptr, wchar_t * * _PDCLIB_restrict endptr );
-*/
 
 long int wcstol( const wchar_t * _PDCLIB_restrict nptr, wchar_t * * _PDCLIB_restrict endptr, int base );
 long long int wcstoll( const wchar_t * _PDCLIB_restrict nptr, wchar_t * * _PDCLIB_restrict endptr, int base );
@@ -137,7 +133,9 @@ size_t mbrlen( const char * _PDCLIB_restrict s, size_t n, mbstate_t * _PDCLIB_re
 size_t mbrtowc( wchar_t * _PDCLIB_restrict pwc, const char * _PDCLIB_restrict s, size_t n, mbstate_t * _PDCLIB_restrict ps );
 size_t wcrtomb( char * _PDCLIB_restrict s, wchar_t wc, mbstate_t * _PDCLIB_restrict ps );
 size_t mbsrtowcs( wchar_t * _PDCLIB_restrict dst, const char * * _PDCLIB_restrict src, size_t len, mbstate_t * _PDCLIB_restrict ps );
+size_t mbsnrtowcs( wchar_t * _PDCLIB_restrict dst, const char * * _PDCLIB_restrict src, size_t nms, size_t len, mbstate_t * _PDCLIB_restrict ps ); // NYI
 size_t wcsrtombs( char * _PDCLIB_restrict dst, const wchar_t * * _PDCLIB_restrict src, size_t len, mbstate_t * _PDCLIB_restrict ps );
+size_t wcsnrtombs( char * _PDCLIB_restrict dst, const wchar_t * * _PDCLIB_restrict src, size_t nwc, size_t len, mbstate_t * _PDCLIB_restrict ps ); // NYI
 
 #ifdef __cplusplus
 }

waterbox/libc/internals/_PDCLIB_config.h

@@ -306,7 +306,7 @@ typedef char * _PDCLIB_va_list;
 /* Locale --------------------------------------------------------------------*/
 
 /* Locale method. See _PDCLIB_locale.h */
-/* #define _PDCLIB_LOCALE_METHOD _PDCLIB_LOCALE_METHOD_TSS */
+#define _PDCLIB_LOCALE_METHOD _PDCLIB_LOCALE_METHOD_FAKE
 
 /* wchar_t encoding */
 #define _PDCLIB_WCHAR_ENCODING _PDCLIB_WCHAR_ENCODING_UCS4

waterbox/libc/internals/_PDCLIB_int.h

@@ -306,6 +306,9 @@ extern char _PDCLIB_Xdigits[];
 /* -------------------------------------------------------------------------- */
 
 #if _PDCLIB_C_VERSION >= 2011
+#ifdef __cplusplus
+#define _Static_assert static_assert
+#endif
 _Static_assert( sizeof( short ) == _PDCLIB_SHRT_BYTES, "_PDCLIB_SHRT_BYTES incorrectly defined, check _PDCLIB_config.h" );
 _Static_assert( sizeof( int ) == _PDCLIB_INT_BYTES, "_PDCLIB_INT_BYTES incorrectly defined, check _PDCLIB_config.h" );
 _Static_assert( sizeof( long ) == _PDCLIB_LONG_BYTES, "_PDCLIB_LONG_BYTES incorrectly defined, check _PDCLIB_config.h" );
@@ -365,7 +368,7 @@ typedef struct lconv              _PDCLIB_lconv_t;
 _PDCLIB_size_t _PDCLIB_mb_cur_max( void );
 
 /* wide-character EOF */
-#define _PDCLIB_WEOF ((wint_t) -1
+#define _PDCLIB_WEOF ((wint_t) -1)
 
 /* -------------------------------------------------------------------------- */
 /* stdio                                                                      */

waterbox/libc/internals/_PDCLIB_locale.h

@@ -16,6 +16,7 @@
 
 #define _PDCLIB_LOCALE_METHOD_TSS           't'
 #define _PDCLIB_LOCALE_METHOD_THREAD_LOCAL  'T'
+#define _PDCLIB_LOCALE_METHOD_FAKE 'F'
 
 #if !defined(_PDCLIB_LOCALE_METHOD)
     /* If undefined, no POSIX per thread locales */
@@ -50,6 +51,20 @@
     {
         _PDCLIB_locale_tls = l;
     }
+#elif _PDCLIB_LOCALE_METHOD == _PDCLIB_LOCALE_METHOD_FAKE
+	extern locale_t _PDCLIB_locale_fake;
+    static inline locale_t _PDCLIB_threadlocale( void )
+    {
+        locale_t l = _PDCLIB_locale_fake;
+        if(l == NULL)
+            l = &_PDCLIB_global_locale;
+        return l;
+    }
+
+    static inline void _PDCLIB_setthreadlocale( locale_t l )
+    {
+        _PDCLIB_locale_fake = l;
+    }
 #else
     #error Locale TSS method unspecified
 #endif