> > Quick question.
> >
> > I am trying to add precompiled headers to a project that
> has been converted to use Cmake.
> >
> > In our library directory, we include all our source and
> build two targets (one static and one dynamic), but setting
> multiple source values only affects the source and not the
> source associated to a particular target. Is there a way to
> get around this issue or something in the works to correct
> this, like an optional target command?
> >
> > Thanks...
> >
> > Code below describing the issue:
> >
> > FUNCTION (ADD_MSVC_PRECOMPILED_HEADERS
> > PrecompiledSource PrecompiledHeader TargetProject)
> > IF (MSVC)
> > # define the location of the precompiled header
> > SET(PrecompiledBinary
> "${CMAKE_CURRENT_BINARY_DIR}/${TargetProject}.pch")
> > # set the target project to use the precompiled binary
> > SET_PROPERTY(TARGET ${TargetProject}
> > APPEND
> > PROPERTY COMPILE_FLAGS
> > "/Yu\"${PrecompiledHeader}\"
> /Fp\"${PrecompiledBinary}\"")
> > # set the source file to compile out the pch
> > SET_PROPERTY(SOURCE ${PrecompiledSource}
> > APPEND
> > PROPERTY COMPILE_FLAGS
> > "/Yc\"${PrecompiledHeader}\"
> /Fp\"${PrecompiledBinary}\"")
> > ENDIF (MSVC)
> > ENDFUNCTION (ADD_MSVC_PRECOMPILED_HEADERS)
> >
> > ADD_LIBRARY(MyLibDynamic SHARED ${SRC})
> ADD_LIBRARY(MyLibStatic STATIC
> > ${SRC})
> >
> > ADD_MSVC_PRECOMPILED_HEADERS(StdAfx.cpp StdAfx.h MyLibDynamic)
> > ADD_MSVC_PRECOMPILED_HEADERS(StdAfx.cpp StdAfx.h MyLibStatic)
> >
> > When MyLibDynamic builds, it builds MyLibStatic.pch but
> tries to find MyLibDynamic.pch.
> > This is because the second function call to setup
> precompiled headers
> > modifies what appears to be a property that is not unique to all
> > targets added at the same directory level of the CMakeLists.
> >
> > Thanks again. . .
>
> You might copy or symlink the concerned sources, one per
> target, and impose the properties on these symlinks, e.g. as follows:
>
> ADD_CUSTOM_COMMAND(
> OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/StdAfxDynamic.cpp
> OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/StdAfxStatic.cpp
> COMMAND ${CMAKE_COMMAND} -E create_symlink
> ${CMAKE_CURRENT_SOURCE_DIR}/StdAfx.cpp
> ${CMAKE_CURRENT_BINARY_DIR}/StdAfxDynamic.cpp
> COMMAND ${CMAKE_COMMAND} -E create_symlink
> ${CMAKE_CURRENT_SOURCE_DIR}/StdAfx.cpp
> ${CMAKE_CURRENT_BINARY_DIR}/StdAfxStatic.cpp
> DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/StdAfx.cpp
> )
>
> ADD_LIBRARY(MyLibDynamic SHARED StdAfxDynamic.cpp ${SRC})
> ADD_LIBRARY(MyLibStatic STATIC StdAfxStatic.cpp ${SRC})
>
> ADD_MSVC_PRECOMPILED_HEADERS(StdAfxDynamic.cpp StdAfx.h
> MyLibDynamic) ADD_MSVC_PRECOMPILED_HEADERS(StdAfxStatic.cpp
> StdAfx.h MyLibStatic)
>
> Of course, SRC mustn't contain StdAfx.cpp anymore for this to work.
>
> 'hope that helps.
>
> Regards,
>
> Michael
Thanks for the reply. While I haven't tested this solution out,
I don't think I would prefer this kind of solution, as I would
hope that CMake would support this option out of the box.
Looks like I'll have to see if there is a ticket for this
kind of change or search the code to see how hard this
can be added to CMake.
Thanks,
Ryan
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