Re: [CMake] Pre-Compiled Headers

ML Thu, 20 Aug 2009 14:38:13 -0700


John,


Awesome, thanks for both of the e-mails.

-Jason

On Aug 20, 2009, at 2:29 PM, John Drescher wrote:

On Thu, Aug 20, 2009 at 5:25 PM, ML<mailingli...@mailnewsrss.com>wrote:

Hi All,

I need to use a pre-compiled header.

I think that I recall that CMake is not yet equipped to handle this.

I found thought a Google search that SET_SOURCE_FILES_PROPERTIESmight be

the way to go.

Has anyone implemented PCH and have an example, advice, etc?


I do this for my Visual Studio builds with a macro.

#########################################################################################

macro( LA_PCH_SUPPORT ProjectName )
if (MSVC)
      if (USE_MSVC_PCH)

              set_source_files_properties(${ProjectName}PCH.cxx
                      PROPERTIES
                      COMPILE_FLAGS "/Yc${ProjectName}PCH.h"
                      )
              foreach( src_file ${${ProjectName}_SRCS} )
                      set_source_files_properties(
                              ${src_file}
                              PROPERTIES
                              COMPILE_FLAGS "/Yu${ProjectName}PCH.h"
                              )
              endforeach( src_file ${${ProjectName}_SRCS} )

              list(APPEND ${ProjectName}_SRCS ${ProjectName}PCH.cxx)
              list(APPEND ${ProjectName}_EXT_HDRS ${ProjectName}PCH.h)

      endif(USE_MSVC_PCH)
endif (MSVC)
endmacro (LA_PCH_SUPPORT)


Then its usage in a project named laGUI

SET( laGUI_SRCS
      ./src/laMultiViewFrameMgr.cxx
      ./src/VTK2dWidget.cpp
      ./src/laCentralWidget.cxx
      ./src/laImageSliceView.cxx
      ./src/laWLWidget.cxx
      ./src/laTableWidget.cxx
      ./src/laPipelineWidget.cxx
      ./src/ImageSliceViewer.cxx
      ./src/InteractorObserver.cxx
      ./src/laVTKInteractorStyleImage2D.cxx
      ./src/laVTKCommandImage2D.cxx
      ./src/la2DView.cxx
      ./src/la3DView.cxx
)

SET( laGUI_EXT_HDRS
      ./Include/InteractorObserver.h
      ./Include/laVTKInteractorStyleImage2D.h
      ./Include/laVTKCommandImage2D.h
)

SET( laGUI_MOC_HDRS
      ./Include/ImageSliceViewer.h
      ./Include/laMultiViewFrameMgr.h
      ./Include/VTK2dWidget.h
      ./Include/laCentralWidget.h
      ./Include/laImageSliceView.h
      ./Include/laWLWidget.h
      ./Include/laTableWidget.h
      ./Include/laPipelineWidget.h
      ./Include/la2DView.h
      ./Include/la3DView.h
)

#Add precompiled header support
LA_PCH_SUPPORT(laGUI)


Then externally create

laGUIPCH.cxx
laGUIPCH.h

in the same folder as the CMakeLists.txt file for the project.

John


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