recent problems with JFX ant script

[Pete Brunet]

I ran into two new problems building JFX on Win 7 this week:

1) I had to unset lowercase tmp and temp.  Apparently there is a new
problem with having duplicates, TMP/tmp and TEMP/temp.  This may be
related to http://www.cmake.org/Bug/print_bug_page.php?bug_id=13131

The failure appeared as:

launcher-win:
     [echo] STARTING: C:\Program Files (x86)\Microsoft Visual Studio
10.0\Common7\IDE\devenv.com native/windows
     [echo] C:\Program Files (x86)\Microsoft Visual Studio
10.0\Common7\IDE\devenv.com /build Release|Win32 IconSwap.vcxproj
     [exec]
     [exec] Microsoft (R) Visual Studio Version 10.0.30319.1.
     [exec] Copyright (coffee) Microsoft Corp. All rights reserved.
     [exec] 1>------ Build started: Project: IconSwap, Configuration:
Release Win32 ------
     [exec] 1>C:\Program Files
(x86)\MSBuild\Microsoft.Cpp\v4.0\Platforms\Win32\Microsoft.Cpp.Win32.Targets(147,5):
error MSB6001: Invalid command line switch for "CL.exe". Item has
already been added. Key in dictionary: 'tmp'  Key being added: 'TMP'
     [exec] ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0
skipped ===

2) DEVENVDIR somehow gets unset.  I had to rerun vsvars.sh to fix it. 

This failure appeared as:

needs-devenv:
     [echo] Using
C:\Users\Pete\JavaFX\controls-RT-26343\jfx\rt-closed\glass\glass-mat-lib-windows\${windows.vs.DEVENVCMD}.

BUILD FAILED

Both of these showed up when building on Windows 7 which I haven't done
in a while.  I was just rerunning the ant script over and over after
source code changes.  I use ant -Dhudson.jfx.job.name=8.0-controls-scrum
sdk-no-docs

Since the problem is intermittent I supposed these could be related to
the combination of cygwin/Norton360.  I'll disable Norton auto-protect
for a while to see if that helps, but wanted to let others know of this
in case it's helpful.

Pete