[Bug 21174] cmd does not support /a arithmetic expression evaluation

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=21174





--- Comment #3 from Dan Kegel <dank at kegel.com>  2010-01-22 12:25:34 ---
And woot!  Looks like gyp uses this:
http://gyp.googlecode.com/svn/trunk/pylib/gyp/generator/msvs.py
And the chromium build on wine fails without it:

To reproduce: use 
 
http://code.google.com/p/winezeug/source/browse/trunk/testsuites/chromium/build.sh
and do
 sh build.sh build webcore_bindings_sources
...
Running
"c:\chromium\src\third_party\WebKit\WebCore\WebCore.gyp\..\..\..\..\third_party\cygwin\setup_env.bat"
&& set CYGWIN=nontsec&& set /a
NUMBER_OF_PROCESSORS_PLUS_1=%NUMBER_OF_PROCESSORS%+1&& ... && bash -c "\"make\"
\"OutDir=`cygpath -m \"${OUTDIR}\"`\" \"IntDir=`cygpath -m \"${INTDIR}\"`\"
\"-j\" \"${NUMBER_OF_PROCESSORS_PLUS_1}\" \"-f\"
\"webcore_bindings_sources_rules.mk\""
make: the `-j' option requires a positive integral argument

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