Allow IPC table to be built in a simulation mode that allows the receiver to fill it

src/epics/util/lib/IPCx.pm

@@ -144,7 +144,7 @@ sub frontEndInitCode {
         for ($l = 0; $l < $::ipcxCnt; $l++) {
            if ($::ipcxParts[$l][6] == $i) {
               $found = 1;
- 
+
               if ( ($::ipcxParts[$l][7] =~ /^Ground/) || ($::ipcxParts[$l][7] =~ /\_Ground/) ) {
                  $calcExp .= "ipcInfo[$::ipcxInitDone]\.mode = IRCV;\n";
               }
@@ -570,8 +570,16 @@ $ipcxRcvrCnt = 0;
          $kk = $::ipcxParts[$ii][6];
 
          if ( ($::partInput[$kk][0] =~ /^Ground/) || ($::partInput[$kk][0] =~ /\_Ground/) ) {
-            $ipcxAdd[$ipcxNotFound][1] = 2;
-            $ipcxRcvrCnt++;
+
+             if(defined $ENV{'SIMULATION_BUILD'})
+             {
+                 $ipcxAdd[$ipcxNotFound][1] = 1;
+             }
+             else
+             {
+                $ipcxAdd[$ipcxNotFound][1] = 2;
+                $ipcxRcvrCnt++;
+            }
          }
          else {
             if ($::partOutCnt[$kk] != 0) {