Remove unused variables and function declarations. Add missing headers.

lib/libc/gen/ttyname.c

@@ -53,7 +53,6 @@ __FBSDID("$FreeBSD$");
 #include "libc_private.h"
 
 static char buf[sizeof(_PATH_DEV) + MAXNAMLEN];
-static char *oldttyname(int, struct stat *);
 static char *ttyname_threaded(int fd);
 static char *ttyname_unthreaded(int fd);
 
@@ -76,10 +75,8 @@ ttyname(int fd)
 char *
 ttyname_r(int fd, char *buf, size_t len)
 {
-	struct stat	dsb;
 	struct stat	sb;
 	char		*rval;
-	int		minlen;
 
 	rval = NULL;
 

lib/libc/locale/srune.c

@@ -29,6 +29,7 @@ __FBSDID("$FreeBSD$");
 
 #include <limits.h>
 #include <rune.h>
+#include <string.h>
 #include <wchar.h>
 
 /*

lib/libc/locale/wcstold.c

@@ -38,9 +38,9 @@ long double
 wcstold(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
 {
 	long double val;
-	char *buf, *end, *p;
+	char *buf, *end;
 	const wchar_t *wcp;
-	size_t clen, len;
+	size_t len;
 
 	while (iswspace(*nptr))
 		nptr++;

lib/libc/posix1e/mac.c

@@ -44,6 +44,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #include <sys/mac.h>
 
@@ -182,7 +183,7 @@ mac_init_internal(int ignore_errors)
 		return (0);
 
 	while (fgets(line, LINE_MAX, file)) {
-		char *arg, *comment, *parse, *statement;
+		char *comment, *parse, *statement;
 
 		if (line[strlen(line)-1] == '\n')
 			line[strlen(line)-1] = '\0';

lib/libc/stdio/vfwprintf.c

@@ -166,8 +166,7 @@ __xfputwc(wchar_t wc, FILE *fp)
 	char buf[MB_LEN_MAX];
 	struct __suio uio;
 	struct __siov iov;
-	size_t i, len;
+	size_t len;
-	int ret;
 
 	if ((fp->_flags & __SSTR) == 0)
 		return (__fputwc(wc, fp));