Include missing header files which define functions for which gcc has

builtins (e.g., exit, strcmp).

usr.bin/cksum/cksum.c

@@ -53,6 +53,7 @@ static const char rcsid[] =
 #include <err.h>
 #include <fcntl.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 

usr.bin/colcrt/colcrt.c

@@ -47,6 +47,7 @@ static const char rcsid[] =
 
 #include <err.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 /*

usr.bin/comm/comm.c

@@ -53,6 +53,7 @@ static const char rcsid[] =
 #include <limits.h>
 #include <locale.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 

usr.bin/expand/expand.c

@@ -48,6 +48,7 @@ static const char rcsid[] =
 #include <ctype.h>
 #include <err.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 /*

usr.bin/finger/net.c

@@ -51,6 +51,7 @@ static const char rcsid[] =
 #include <netdb.h>
 #include <pwd.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <utmp.h>

usr.bin/getopt/getopt.c

@@ -1,6 +1,7 @@
 /* $FreeBSD$ */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 main(argc, argv)

usr.bin/ipcs/ipcs.c

@@ -40,6 +40,7 @@ static const char rcsid[] =
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 
 #include <sys/types.h>

usr.bin/keylogin/keylogin.c

@@ -40,6 +40,7 @@ static char sccsid[] = "@(#)keylogin.c 1.4 91/03/11 Copyr 1986 Sun Micro";
  * Set secret key on local machine
  */
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <pwd.h>
 #include <unistd.h>

usr.bin/renice/renice.c

@@ -53,6 +53,7 @@ static const char rcsid[] =
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <pwd.h>
 
 int donice __P((int, int, int));

usr.bin/soelim/soelim.c

@@ -47,6 +47,8 @@ static const char rcsid[] =
 
 #include <err.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 /*
  * soelim - a filter to process n/troff input eliminating .so's
  *

usr.bin/tput/tput.c

@@ -51,6 +51,7 @@ static char rcsid[] =
 #include <termcap.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 
 #undef putchar

usr.bin/tty/tty.c

@@ -46,6 +46,7 @@ static const char rcsid[] =
 #endif /* not lint */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 static void usage __P((void));

usr.bin/unifdef/unifdef.c

@@ -64,6 +64,8 @@ static const char rcsid[] =
 #include <ctype.h>
 #include <err.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
 typedef int Reject_level;
 

usr.bin/unvis/unvis.c

@@ -47,6 +47,7 @@ static const char rcsid[] =
 
 #include <err.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 #include <vis.h>
 

usr.bin/uuencode/uuencode.c

@@ -55,6 +55,7 @@ static const char rcsid[] =
 
 #include <err.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 void encode __P((void));

usr.bin/who/who.c

@@ -55,6 +55,7 @@ static const char rcsid[] =
 #include <locale.h>
 #include <pwd.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include <unistd.h>

usr.bin/ypcat/ypcat.c

@@ -38,6 +38,8 @@ static const char rcsid[] =
 #include <ctype.h>
 #include <err.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 
 #include <rpc/rpc.h>

usr.bin/ypmatch/ypmatch.c

@@ -38,6 +38,7 @@ static const char rcsid[] =
 #include <ctype.h>
 #include <err.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>