Add "#include <stdlib.h>" (to declatre exit(3)) to example program.

man2/intro.2

@@ -137,6 +137,7 @@ passed by-value or by-pointer (for aggregates like structs).
 .sp
 .nf
 #include <stdio.h>
+#include <stdlib.h>
 #include <errno.h>
 #include <linux/unistd.h>       /* for _syscallX macros/related stuff */
 #include <linux/kernel.h>       /* for struct sysinfo */

man2/select.2

@@ -476,6 +476,7 @@ to a local variable and passing that variable to the system call.
 .SH EXAMPLE
 .nf
 #include <stdio.h>
+#include <stdlib.h>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <unistd.h>

man3/envz_add.3

@@ -120,6 +120,7 @@ Handle with care.
 .sp
 .nf
 #include <stdio.h>
+#include <stdlib.h>
 #include <envz.h>
 
 int

man3/fmtmsg.3

@@ -237,6 +237,7 @@ vpfmt(), lfmt(), and vlfmt()", and will be removed later.
 .SH EXAMPLE
 .nf
 #include <stdio.h>
+#include <stdlib.h>
 #include <fmtmsg.h>
 
 int

man3/getgrent_r.3

@@ -143,6 +143,7 @@ in the stream with all other threads.
 #define _GNU_SOURCE
 #include <grp.h>
 #include <stdio.h>
+#include <stdlib.h>
 #define BUFLEN 4096
 
 int

man3/rtime.3

@@ -82,6 +82,7 @@ The result is the localtime of the computer 'linux'.
 .sp
 .nf
 #include <stdio.h>
+#include <stdlib.h>
 #include <errno.h>
 #include <string.h>
 #include <time.h>

man3/strptime.3

@@ -384,6 +384,7 @@ and
 .sp
 .nf
 #include <stdio.h>
+#include <stdlib.h>
 #include <time.h>
 
 int

man3/wordexp.3

@@ -86,6 +86,7 @@ The output is approximately that of "ls [a-c]*.c".
 .LP
 .nf
 #include <stdio.h>
+#include <stdlib.h>
 #include <wordexp.h>
 
 int