[Cmake] Two (related) questions

[Andy Cedilnik]

Hi Geoffrey,

There are two good sources to figure that out in VTK (if you have
source):
1. vtktiff (VTK/Utilities/tiff)
   uses ADD_CUSTOM_COMMAND to run a binary that is being created by
   build process and generate a source code that is then used in 
   the rest of the build

ADD_CUSTOM_COMMAND(
      SOURCE ${EXECUTABLE_OUTPUT_PATH}/mkg3states
      COMMAND ${EXECUTABLE_OUTPUT_PATH}/mkg3states
      ARGS -c const ${VTKTIFF_BINARY_DIR}/tif_fax3sm.c
      TARGET mkg3states
      OUTPUTS ${VTKTIFF_BINARY_DIR}/tif_fax3sm.c)

2. VTKJava (VTK/Wrapping/Java)
   uses it to build java classes even though CMake does not support that
   directly:

  ADD_CUSTOM_COMMAND(SOURCE VTKJava
                     COMMAND ${JAVA_COMPILE} 
		     ARGS ${VTK_BINARY_DIR}/java/vtk/vtk*.java
                     TARGET VTKJava
		     OUTPUTS ${VTK_BINARY_DIR}/java/vtk/vtkObject.class)
  ADD_CUSTOM_COMMAND(SOURCE VTKJava
	             COMMAND ${CMAKE_COMMAND}
                     ARGS -E chdir 
                            ${VTK_BINARY_DIR}/java ${JAVA_ARCHIVE}
                            -cvf ${LIBRARY_OUTPUT_PATH}/vtk.jar
                            vtk
		       TARGET VTKJava
		       OUTPUTS ${LIBRARY_OUTPUT_PATH}/vtk.jar)

So, in general, what this is:

 SOURCE - something that will be build to trigger this command
 COMMAND - command that will be executed
 ARGS - arguments for command
 TARGET - target which the command will be part of 
 OUTPUTS - what the command generates

				Andy

On Tue, 2002-08-27 at 10:09, Geoffrey Cross wrote:
> 
> 
> > For the renaming problem, you can use a custom command to copy the
> > shared library after it is built to a new name.
> 
> How does this ADD_CUSTOM_COMMAND thing work?  The documentation baffles
> me... :).