--- common/configure.orig	2008-10-14 08:28:36.000000000 -0500
+++ common/configure	2022-03-09 06:46:43.000000000 -0600
@@ -925,6 +925,7 @@
   cat > conftest.$ac_ext <<EOF
 #line 927 "configure"
 #include "confdefs.h"
+#include <stdlib.h>
 $ac_declaration
 int main() {
 exit (42);
--- common/network/TcpSocket.cxx.orig	2008-10-16 10:16:20.000000000 -0500
+++ common/network/TcpSocket.cxx	2013-12-18 17:50:54.000000000 -0600
@@ -24,6 +24,7 @@
 #else
 #define errorNumber errno
 #define closesocket close
+#include <stdlib.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>
--- unix/configure.orig	2008-10-14 08:28:36.000000000 -0500
+++ unix/configure	2022-03-09 06:46:36.000000000 -0600
@@ -929,6 +929,7 @@
   cat > conftest.$ac_ext <<EOF
 #line 931 "configure"
 #include "confdefs.h"
+#include <stdlib.h>
 $ac_declaration
 int main() {
 exit (42);
--- unix/tx/TXImage.cxx.orig	2008-10-16 10:16:21.000000000 -0500
+++ unix/tx/TXImage.cxx	2013-12-18 17:52:06.000000000 -0600
@@ -20,6 +20,7 @@
 //
 
 
+#include <stdlib.h>
 #include <stdio.h>
 #include <strings.h>
 #include <sys/types.h>
--- unix/x0vncserver/Image.cxx.orig	2008-10-16 10:16:21.000000000 -0500
+++ unix/x0vncserver/Image.cxx	2013-12-18 17:53:56.000000000 -0600
@@ -20,6 +20,7 @@
 //
 
 
+#include <stdlib.h>
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/ipc.h>