mocinclude.opt problem building on Windows using cmd line.

Hi,

I'm trying to move all my builds from using Visual Studio to building with CMD line scripts and MSBUILD. For some projects, everything is fine. For bigger projects, the MOC step gives the error

moc: Cannot open options file specified with a @

I generate the Visual Studio project using

  set PATH=%PATH%;C:\Qt\6.5.3\msvc2019_64\bin

  qmake -tp vc FIRdesignerM.pro

and the resulting vcxproj file opens and compiles fine in Visual Studio 2022, but when compiling the vcxproj at the command line using

  msbuild /property:Configuration=Release

the UI files MOC ok, but when it gets to the header files, MOC reports

  moc: Cannot open options file specified with a @

For these files, the vcxproj file has 

C:\Qt\6.5.3\msvc2019_64\bin\moc.exe  -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_DEPRECATED_WARNINGS -DAPP_VERSION="4.0.10" -DV_SPACING_1=5 -DV_SPACING_2=5 -D_WINDOWS_ASIO_ -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DNDEBUG -DQT_NO_DEBUG -DQT_WEBENGINEWIDGETS_LIB -DQT_PRINTSUPPORT_LIB -DQT_WIDGETS_LIB -DQT_WEBENGINECORE_LIB -DQT_QUICK_LIB -DQT_OPENGL_LIB -DQT_SVG_LIB -DQT_MULTIMEDIA_LIB -DQT_GUI_LIB -DQT_QMLMODELS_LIB -DQT_WEBCHANNEL_LIB -DQT_QML_LIB -DQT_WEBSOCKETS_LIB -DQT_NETWORK_LIB -DQT_QMLINTEGRATION_LIB -DQT_POSITIONING_LIB -DQT_CORE5COMPAT_LIB -DQT_CORE_LIB --compiler-flavor=msvc --include C:/code_p4_home/FIRdesignerM_2/Release4.0.10/release/moc_predefs.h @release/mocinclude.opt audio\audiocontrol.h -o release\moc_audiocontrol.cpp

What I've found is that mocinclude.opt is in the project directly, but is not in the 'release' subdirectory. So when scripting the build, I have to copy mocinclude.opt into release\mocinclude.opt before running MSBUILD.

Like I said, this problem doesn't show up when compiling the vcxproj file using visual studio,

One solution I suggest is that the qmake step should create the release directory and copy the mocinclude.opt file into it; ready for when the build starts. Alternatively, have qmake set the locations (in the vcxproj) to use the project directory, and NOT release or debug subdirectories.