allow IOC to mount through different path than build system

src/makeBaseApp/top/configure/CONFIG

@@ -3,3 +3,11 @@ include $(TOP)/configure/CONFIG_APP
 # Add any changes to make definitions here
 
 #CROSS_COMPILER_TARGET_ARCHS = vxWorks-68040
+
+# Use this when your IOC and the host use different paths
+# to access the application. Typically this will be 
+# used with the Microsoft FTP server or with NFS mounts. Use
+# is indicated by failure of the cdCommands script on
+# vxWorks. You must rebuild in the iocBoot directory 
+# before this takes effect.
+#IOCS_APPL_TOP = <the top of the application as seen by the IOC>

src/makeBaseApp/top/configure/RULES.ioc

@@ -2,8 +2,8 @@
 include $(EPICS_BASE)/configure/RULES_DIRS
 buildInstall: cdCommands
 
-cdCommands: Makefile
-	$(PERL) $(TOP)/configure/makeIocCdCommands.pl $(ARCH)
+cdCommands: Makefile $(TOP)/configure/makeIocCdCommands.pl $(TOP)/configure/CONFIG
+	$(PERL) $(TOP)/configure/makeIocCdCommands.pl $(ARCH) $(IOCS_APPL_TOP)
 
 clean:
 	@$(RM) cdCommands

src/makeBaseApp/top/configure/makeIocCdCommands.pl

@@ -6,7 +6,16 @@ use Cwd;
 $cwd  = cwd();
 #hack for sun4
 $cwd =~ s|/tmp_mnt||;
+#hack for win32
+$cwd =~ s|\\|\/|g;
 $arch = $ARGV[0];
+$iocsApplTop = $ARGV[1];
+#remove top parts of current working directory
+#and add ioc's appl top alias (if supplied)
+if ( $iocsApplTop ne "" ) {
+    $cwd =~ s|.*(/iocBoot.*)|$1|;
+    $cwd = $iocsApplTop . $cwd;
+}
 
 unlink("cdCommands");
 open(OUT,">cdCommands") or die "$! opening cdCommands";