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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [Win] CMake seems to build all generated files every time"
   href="https://bugs.webkit.org/show_bug.cgi?id=155872#c1">Comment # 1</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [Win] CMake seems to build all generated files every time"
   href="https://bugs.webkit.org/show_bug.cgi?id=155872">bug 155872</a>
              from <span class="vcard"><a class="email" href="mailto:bfulgham&#64;webkit.org" title="Brent Fulgham &lt;bfulgham&#64;webkit.org&gt;"> <span class="fn">Brent Fulgham</span></a>
</span></b>
        <pre>The bottleneck seems to be that Visual Studio waits for each invocation of the &quot;Custom Build Step&quot; to complete:

setlocal
cd C:\Projects\WebKit\OpenSource\Source\WebCore
if %errorlevel% neq 0 goto :cmEnd
C:
if %errorlevel% neq 0 goto :cmEnd
C:\cygwin\bin\perl.exe -IC:/Projects/WebKit/OpenSource/Source/WebCore/bindings/scripts C:/Projects/WebKit/OpenSource/Source/WebCore/bindings/scripts/generate-bindings.pl --defines &quot;LANGUAGE_JAVASCRIPT=1 &quot; ... endless stuff

if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal &amp; call :cmErrorLevel %errorlevel% &amp; goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd</pre>
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