more header fixes, minor warning fix

include/wchar.h

@@ -10,12 +10,19 @@ extern "C" {
 #define __NEED_size_t
 #define __NEED_wchar_t
 #define __NEED_wint_t
+
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
 #define __NEED_wctype_t
+#endif
 
 #include <bits/alltypes.h>
 
 #undef NULL
+#ifdef __cplusplus
+#define NULL 0
+#else
 #define NULL ((void*)0)
+#endif
 
 #undef WCHAR_MIN
 #undef WCHAR_MAX
@@ -74,9 +81,6 @@ size_t mbrlen (const char *, size_t, mbstate_t *);
 size_t mbsrtowcs (wchar_t *, const char **, size_t, mbstate_t *);
 size_t wcsrtombs (char *, const wchar_t **, size_t, mbstate_t *);
 
-int wcwidth (wchar_t);
-int wcswidth (const wchar_t *, size_t);
-
 float wcstof (const wchar_t *, wchar_t **);
 double wcstod (const wchar_t *, wchar_t **);
 long double wcstold (const wchar_t *, wchar_t **);
@@ -126,6 +130,9 @@ size_t wcsftime (wchar_t *, size_t, const wchar_t *, const struct tm *);
 
 #undef iswdigit
 
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+int wcwidth (wchar_t);
+int wcswidth (const wchar_t *, size_t);
 int       iswalnum(wint_t);
 int       iswalpha(wint_t);
 int       iswblank(wint_t);
@@ -142,8 +149,9 @@ int       iswctype(wint_t, wctype_t);
 wint_t    towlower(wint_t);
 wint_t    towupper(wint_t);
 wctype_t  wctype(const char *);
-
+#undef iswdigit
 #define iswdigit(a) ((unsigned)(a)-'0' < 10)
+#endif
 
 #ifdef __cplusplus
 }

include/wctype.h

@@ -35,6 +35,7 @@ wint_t    towupper(wint_t);
 wctrans_t wctrans(const char *);
 wctype_t  wctype(const char *);
 
+#undef iswdigit
 #define iswdigit(a) ((unsigned)((a)-L'0') < 10)
 
 #ifdef __cplusplus

src/ctype/wcwidth.c

 #include <inttypes.h>
 #include <wchar.h>
+#include <wctype.h>
 
 #define R(a,b,w) { (b), (w)/2, (b)-(a) }
 

src/stdlib/strtoimax.c

@@ -4,7 +4,7 @@
 
 intmax_t strtoimax(const char *s1, char **p, int base)
 {
-	const unsigned char *s = s1;
+	const unsigned char *s = (const void *)s1;
 	int sign = 0;
 	uintmax_t x;
 
@@ -15,7 +15,7 @@ intmax_t strtoimax(const char *s1, char **p, int base)
 	if (*s == '-') sign = *s++;
 	else if (*s == '+') s++;
 
-	x = strtoumax(s, p, base);
+	x = strtoumax((const void *)s, p, base);
 	if (x > INTMAX_MAX) {
 		if (!sign || -x != INTMAX_MIN)
 			errno = ERANGE;

src/stdlib/wcstoimax.c

 #include <wchar.h>
+#include <wctype.h>
 #include <inttypes.h>
 #include <errno.h>
 

src/stdlib/wcstoumax.c

 #include <wchar.h>
+#include <wctype.h>
 #include <stdlib.h>
 #include <inttypes.h>
 #include <errno.h>