--- a/addcr.c
+++ b/addcr.c
@@ -1,7 +1,7 @@
 #include "buffer.h"
 #include "exit.h"
 
-main()
+int main()
 {
   register int n;
   register char *x;
--- a/argv0.c
+++ b/argv0.c
@@ -1,7 +1,7 @@
 #include "pathexec.h"
 #include "strerr.h"
 
-main(int argc,char **argv,char **envp)
+int main(int argc,char **argv,char **envp)
 {
   if (argc < 3)
     strerr_die1x(100,"argv0: usage: argv0 realname program [ arg ... ]");
--- a/auto-str.c
+++ b/auto-str.c
@@ -11,7 +11,7 @@ void puts(char *s)
   if (buffer_puts(&b,s) == -1) _exit(111);
 }
 
-main(int argc,char **argv)
+int main(int argc,char **argv)
 {
   char *name;
   char *value;
--- a/chkshsgr.c
+++ b/chkshsgr.c
@@ -1,7 +1,7 @@
 #include <grp.h>
 #include "exit.h"
 
-main()
+int main()
 {
   gid_t x[4];
 
--- a/delcr.c
+++ b/delcr.c
@@ -1,7 +1,7 @@
 #include "buffer.h"
 #include "exit.h"
 
-main()
+int main()
 {
   register int n;
   register char *x;
--- a/fixcrio.c
+++ b/fixcrio.c
@@ -127,7 +127,7 @@ void doit(int fdleft,int fdright)
   _exit(0);
 }
 
-main(int argc,char **argv,char **envp)
+int main(int argc,char **argv,char **envp)
 {
   int piin[2];
   int piout[2];
--- a/install.c
+++ b/install.c
@@ -138,7 +138,7 @@ int mode;
     strerr_die6sys(111,FATAL,"unable to chmod .../",subdir,"/",file,": ");
 }
 
-main()
+int main()
 {
   fdsourcedir = open_read(".");
   if (fdsourcedir == -1)
--- a/instcheck.c
+++ b/instcheck.c
@@ -101,7 +101,7 @@ int mode;
   perm("",home,"/",file,S_IFREG,uid,gid,mode);
 }
 
-main()
+int main()
 {
   hier();
   _exit(0);
--- a/mconnect-io.c
+++ b/mconnect-io.c
@@ -19,7 +19,7 @@ ssize_t myread(int fd,char *buf,int len)
   return read(fd,buf,len);
 }
 
-main()
+int main()
 {
   int pid;
   int wstat;
--- a/rblsmtpd.c
+++ b/rblsmtpd.c
@@ -191,7 +191,7 @@ void rblsmtpd(void)
   _exit(0);
 }
 
-main(int argc,char **argv,char **envp)
+int main(int argc,char **argv,char **envp)
 {
   int flagwantdefaultrbl = 1;
   char *x;
--- a/rblspp.c
+++ b/rblspp.c
@@ -165,7 +165,7 @@ void rblspp(void)
   _exit(0);
 }
 
-main(int argc,char **argv,char **envp)
+int main(int argc,char **argv,char **envp)
 {
   char *x;
   int opt;
--- a/recordio.c
+++ b/recordio.c
@@ -142,7 +142,7 @@ void doit(int fdleft,int fdright) /* copy 0 -> fdleft, copy fdright -> 1 */
   _exit(0);
 }
 
-main(int argc,char **argv,char **envp)
+int main(int argc,char **argv,char **envp)
 {
   int piin[2];
   int piout[2];
--- a/tcpclient.c
+++ b/tcpclient.c
@@ -70,7 +70,7 @@ char ipstr[IP6_FMT];
 
 char seed[128];
 
-main(int argc,char **argv)
+int main(int argc,char **argv)
 {
   int fakev4=0;
   unsigned long u;
--- a/tcprules.c
+++ b/tcprules.c
@@ -90,7 +90,7 @@ void doaddressdata(void)
   if (cdb_make_add(&c,address.s,address.len,data.s,data.len) == -1) die_write();
 }
 
-main(int argc,char **argv)
+int main(int argc,char **argv)
 {
   int colon;
   char *x;
--- a/tcprulescheck.c
+++ b/tcprulescheck.c
@@ -34,7 +34,7 @@ void found(char *data,unsigned int datalen)
   _exit(0);
 }
 
-main(int argc,char **argv)
+int main(int argc,char **argv)
 {
   char *fnrules;
   int fd;
--- a/tcpserver.c
+++ b/tcpserver.c
@@ -323,7 +323,7 @@ void sigchld()
   }
 }
 
-main(int argc,char **argv)
+int main(int argc,char **argv)
 {
   char *hostname;
   char *portname;
--- a/trycpp.c
+++ b/trycpp.c
@@ -1,4 +1,4 @@
-main()
+int main()
 {
 #ifdef NeXT
   printf("nextstep\n"); exit(0);
--- a/trylsock.c
+++ b/trylsock.c
@@ -1,4 +1,4 @@
-main()
+int main()
 {
   ;
 }
--- a/trypoll.c
+++ b/trypoll.c
@@ -2,7 +2,7 @@
 #include <fcntl.h>
 #include <poll.h>
 
-main()
+int main()
 {
   struct pollfd x;
 
--- a/trysgact.c
+++ b/trysgact.c
@@ -1,6 +1,6 @@
 #include <signal.h>
 
-main()
+int main()
 {
   struct sigaction sa;
   sa.sa_handler = 0;
--- a/trysgprm.c
+++ b/trysgprm.c
@@ -1,6 +1,6 @@
 #include <signal.h>
 
-main()
+int main()
 {
   sigset_t ss;
  
--- a/tryshsgr.c
+++ b/tryshsgr.c
@@ -1,4 +1,4 @@
-main()
+int main()
 {
   short x[4];
  
--- a/tryvfork.c
+++ b/tryvfork.c
@@ -1,4 +1,4 @@
-main()
+int main()
 {
   vfork();
 }
--- a/trywaitp.c
+++ b/trywaitp.c
@@ -1,7 +1,7 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
-main()
+int main()
 {
   waitpid(0,0,0);
 }
--- a/x86cpuid.c
+++ b/x86cpuid.c
@@ -5,7 +5,7 @@ void nope()
   exit(1);
 }
 
-main()
+int main()
 {
   unsigned long x[4];
   unsigned long y[4];