Andrew Ross wrote:
> On Tue, Mar 03, 2009 at 01:19:45PM +0000, Alban Rochel wrote:
>> Dear all,
>>
>> I am currently working on the delivery of various Qt-based drivers for
>> plplot, based on our own version of these drivers in our QSAS software.
>>
>> Unfortunately, none of us in the team has knowledge in cmake, and
>> although I've managed to do most of what I wanted, I'm still stuck on
>> one point, and I would appreciate some help.
>>
>> The Qt library somehow extends the C++ language by adding keywords in
>> the class declarations (in my case in qt.h). A qt.moc file has to be
>> generated from this file using the Qt moc software, converting the Qt
>> keywords to C++ implementations.
>>
>> Thus, before compiling my qt.cpp implementation, I have to produce a
>> qt.moc file from qt.h. The QT4_GENERATE_MOC macro is supposed to do
>> that, but I haven't found exactly where to put this call.
>>
>> I've added it in drivers-finish.cmake, as follows:
>> elseif(DRIVER STREQUAL "qt")
>> FIND_PACKAGE(Qt4)
>> INCLUDE(${QT_USE_FILE})
>> QT4_GENERATE_MOC(qt.h qt.moc)
>> set(${DRIVER}_SOURCE
>> ${CMAKE_SOURCE_DIR}/drivers/${DRIVER}.cpp
>> ${${DRIVER}_SOURCE}
>> But the qt.moc file is nowhere to be found. Maybe it should rather go
>> somewhere in drivers/CMakeLists.txt? Or cmake/modules/qt.cmake?
>>
>> Any information would be welcome. Of course feel free to ask me for any
>> detail I would have omitted.
>
> Alban,
>
> I've not used the cmake qt support, but from what you have said I assume
> that qt.h is an include file supplied by you for the qt driver. Is this in
> the drivers directory? If so then I suspect your QT4_GENERATE_MOC command
> wants to go in drivers/CMakeLists.txt.
>
> Generally the CMakeLists.txt command contains the instructions for building
> the targets in that directory. In this case running moc on the header file
> is part of the build processess, like compiling the source, so should go
> there.
>
> Files in the cmake/modules directory are cmake files which are used in
> configuring plplot, testing for available compilers / headers / libraries
> etc. What you probably need is a new file in cmake/modules/ which checks for
> the qt libraries and sets the cmake configuration variables accordingly.
> You can probably base it on one of the existing drivers. The code in
> drivers/CMakeLists.txt will then actually do the building of the qt
> driver based on these configuration variables.
>
> If you can get something which works, then Alan or I would be happy to tidy
> it up into plplot "style" such as it is or help with the cmake support.
>
> Thanks
>
> Andrew
Andrew,
Thanks for your quick answer, I'll try and put it in
drivers/CMakeLists.txt and see how this works.
Alban
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