My VS2010 on every build always recreate all .moc files and associated .cpp files. Problem was in incredibuild clausule during compilation of my Qt libraries.
<AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Rem;axApplication\axAppException\dialogUnhandledException.ui;%(AdditionalInputs)</AdditionalInputs>
<Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Rem IncrediBuild_AllowRemote 
if errorlevel 1 goto VCEnd
 Rem IncrediBuild_OutputFile ..\GeneratedFiles\ui_dialogUnhandledException.h 
if errorlevel 1 goto VCEnd
 Q:\ExternalLibraries\qt-git-32bit\bin\uic.exe axApplication\axAppException\dialogUnhandledException.ui -o ..\GeneratedFiles\ui_dialogUnhandledException.h</Command>
<Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">UIC axApplication\axAppException\dialogUnhandledException.ui</Message>
<Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">..\GeneratedFiles\ui_dialogUnhandledException.h;%(Outputs)</Outputs>
instead of
<AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Q:\ExternalLibraries\qt-4.8.2-32bit\bin\uic.exe;axApplication\axAppException\dialogUnhandledException.ui;%(AdditionalInputs)</AdditionalInputs>
<Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Q:\ExternalLibraries\qt-4.8.2-32bit\bin\uic.exe axApplication\axAppException\dialogUnhandledException.ui -o ..\GeneratedFiles\ui_dialogUnhandledException.h</Command>
<Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">UIC axApplication\axAppException\dialogUnhandledException.ui</Message>
<Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">..\GeneratedFiles\ui_dialogUnhandledException.h;%(Outputs)</Outputs>
Although qmake added all these incredibuild defines to my VS project, Incredibuild still doesn’t compile it in parallel so it was totally useless. The most simply way is edit incredibuild_xge.prf and turn-off it.
mkspecs\features\incredibuild_xge.prf
contains(TEMPLATE, "XXXvc.*") {
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