diff -ru cmake-2.6.4.orig/Source/kwsys/ProcessUNIX.c cmake-2.6.4/Source/kwsys/ProcessUNIX.c
--- cmake-2.6.4.orig/Source/kwsys/ProcessUNIX.c	2010-02-17 14:39:20 +0100
+++ cmake-2.6.4/Source/kwsys/ProcessUNIX.c	2010-02-17 15:52:30 +0100
@@ -1018,6 +1018,9 @@
   int numReady = 0;
   int max = -1;
   kwsysProcessTimeNative* timeout = 0;
+#ifdef __INTERIX
+  int is_sig_only = 0;
+#endif
 
   /* Check for any open pipes with data reported ready by the last
      call to select.  According to "man select_tut" we must deal
@@ -1125,9 +1128,65 @@
 
   /* Run select to block until data are available.  Repeat call
      until it is not interrupted.  */
+#ifdef __INTERIX
+  /* hack around broken sh** ... */
+  is_sig_only = 1;
+  for(i=0; i < KWSYSPE_PIPE_COUNT; ++i) {
+	if(cp->PipeReadEnds[i] >= 0) {
+		if(i != KWSYSPE_PIPE_SIGNAL)
+			is_sig_only = 0;
+	} else {
+		if(i == KWSYSPE_PIPE_SIGNAL)
+			is_sig_only = 0;
+	}
+  }
+
+  if(is_sig_only && !timeout) {
+	static kwsysProcessTimeNative _tmp = { 1,0 };
+	timeout = &_tmp;
+  }
+
+  while(1) {
+#endif
+
   while(((numReady = select(max+1, &cp->PipeSet, 0, 0, timeout)) < 0) &&
         (errno == EINTR));
 
+#ifdef __INTERIX
+	if(!is_sig_only)
+		break;
+	
+	if(numReady != 0)
+		break;
+		
+	/* only signal pipe left over, and nothing waiting ...
+	 * we'll just wait() for the process to see whether it still exists.
+	 * if it does, we continue to select, otherwise we return 0. no need
+	 * to modify the PipeSet as the pipe will be set in there anyway then. */
+	for(i=0; i < cp->NumberOfCommands; ++i)
+    {
+    if(cp->ForkPIDs[i])
+      {
+      int result;
+      while(((result = waitpid(cp->ForkPIDs[i],
+                               &cp->CommandExitCodes[i], WNOHANG)) < 0) &&
+            (errno == EINTR));
+      if(result == cp->ForkPIDs[i])
+        {
+			/* uh ... process terminated, SIGCHLD got lost?
+			 * what should i DO here? */
+
+			/* Set the pipe in a signalled state.  */
+			kwsysProcessCleanupDescriptor(&cp->SignalPipe);
+			return 1;
+        }
+      }
+    }
+	/* no process terminated, nothing select()ed. */
+	continue;
+  }
+#endif
+
   /* Check result of select.  */
   if(numReady == 0)
     {
@@ -1215,12 +1274,16 @@
     return 1;
     }
 
+/* errr.... this looks wrong, and is not done for the select() part above.
+ * (the kwsysProcessGetTimeoutLeft part from above is in both code paths).  */
+#if 0
   if((timeoutLength.tv_sec == 0) && (timeoutLength.tv_usec == 0))
     {
     /* Timeout has already expired.  */
     wd->Expired = 1;
     return 1;
     }
+#endif
 
   /* Sleep a little, try again. */
   {