patch from Hans-Christian Egtvedt to silence some spurious signed warnings

libc/stdio/_scanf.c

@@ -731,7 +731,7 @@ void attribute_hidden __init_scan_cookie(register struct scan_cookie *sc,
 	sc->decpt = __UCLIBC_CURLOCALE_DATA.decimal_point;
 	sc->decpt_len = __UCLIBC_CURLOCALE_DATA.decimal_point_len;
 #else  /* __UCLIBC_HAS_LOCALE__ */
-	sc->fake_decpt = sc->decpt = decpt_str;
+	sc->fake_decpt = sc->decpt = (unsigned char *) decpt_str;
 	sc->decpt_len = 1;
 #endif /* __UCLIBC_HAS_LOCALE__ */
 #ifdef __UCLIBC_HAS_WCHAR__
@@ -2087,7 +2087,7 @@ int attribute_hidden __psfs_do_numeric(psfs_t *psfs, struct scan_cookie *sc)
 			}
 			++psfs->cnt;
 			_store_inttype(psfs->cur_ptr, psfs->dataargtype,
-						   (uintmax_t) STRTOUIM(buf, NULL, base, 1-usflag));
+						   (uintmax_t) STRTOUIM((char *) buf, NULL, base, 1-usflag));
 		}
 		return 0;
 	}
@@ -2101,7 +2101,7 @@ int attribute_hidden __psfs_do_numeric(psfs_t *psfs, struct scan_cookie *sc)
 	p = sc->fake_decpt;
 	do {
 		if (!*p) {
-			strcpy(b, sc->decpt);
+			strcpy((char *) b, (char *) sc->decpt);
 			b += sc->decpt_len;
 			break;
 		}
@@ -2236,7 +2236,7 @@ int attribute_hidden __psfs_do_numeric(psfs_t *psfs, struct scan_cookie *sc)
 	{
 		__fpmax_t x;
 		char *e;
-		x = __strtofpmax(buf, &e, exp_adjust);
+		x = __strtofpmax((char *) buf, &e, exp_adjust);
 		assert(!*e);
 		if (psfs->store) {
 			if (psfs->dataargtype & PA_FLAG_LONG_LONG) {

libc/stdio/_vfprintf.c

@@ -1427,7 +1427,7 @@ static size_t _charpad(FILE * __restrict stream, int padchar, size_t numpad)
 	FMT_TYPE pad[1];
 
 	*pad = padchar;
-	while (todo && (OUTNSTR(stream, pad, 1) == 1)) {
+	while (todo && (OUTNSTR(stream, (const unsigned char *) pad, 1) == 1)) {
 		--todo;
 	}
 
@@ -1831,7 +1831,7 @@ static int _do_one_spec(FILE * __restrict stream,
 			}
 		}
 #else  /* __UCLIBC_HAS_WCHAR__ */
-		if (_outnstr(stream, s, slen) != slen) {
+		if (_outnstr(stream, (const unsigned char *) s, slen) != slen) {
 			return -1;
 		}
 #endif /* __UCLIBC_HAS_WCHAR__ */
@@ -1886,7 +1886,7 @@ int VFPRINTF (FILE * __restrict stream,
 	{
 		count = -1;
 	} else if (_PPFS_init(&ppfs, format) < 0) {	/* Bad format string. */
-		OUTNSTR(stream, (const FMT_TYPE *) ppfs.fmtpos,
+		OUTNSTR(stream, (const unsigned char *) ppfs.fmtpos,
 				STRLEN((const FMT_TYPE *)(ppfs.fmtpos)));
 #if defined(L_vfprintf) && !defined(NDEBUG)
 		fprintf(stderr,"\nIMbS: \"%s\"\n\n", format);
@@ -1901,7 +1901,7 @@ int VFPRINTF (FILE * __restrict stream,
 			}
 
 			if (format-s) {		/* output any literal text in format string */
-				if ( (r = OUTNSTR(stream, s, format-s)) != (format-s)) {
+				if ( (r = OUTNSTR(stream, (const unsigned char *) s, format-s)) != (format-s)) {
 					count = -1;
 					break;
 				}

libc/stdio/vsnprintf.c

@@ -55,8 +55,8 @@ int vsnprintf(char *__restrict buf, size_t size,
 
 	/* Set these last since __bufputc initialization depends on
 	 * __user_locking and only gets set if user locking is on. */
-	f.__bufstart = buf;
-	f.__bufend = buf + size;
+	f.__bufstart = (unsigned char *) buf;
+	f.__bufend = (unsigned char *) buf + size;
 	__STDIO_STREAM_INIT_BUFREAD_BUFPOS(&f);
 	__STDIO_STREAM_DISABLE_GETC(&f);
 	__STDIO_STREAM_ENABLE_PUTC(&f);