[CMake] Custom command behavior

[Alexander Broekhuis]

Hi all,

When using a custom command in a macro I see some strange behavior.

The following setup is used:
I have a macro, called "bundle", in this macro a custom command is added.
This command uses a library as target, and executes cpack with a
configuration. I use cpack to create a zip file inside my project with the
library and additional resources.

This macro is used with the name of a library. When running the library
target (make {lib-name}), the command is executed for all usages of the
macro, instead of only for the given target. If I change it to a custom
target, and add that target to the library target using add_dependencies it
is all ok, but a custom target is always out-of-date, which is something I
would like to prevent.

If I run the cpack command myself it is only executed once (as expected).

What am I doing wrong here?

TiA!

ps: The macro I use:
------------------------
macro(bundle)
 PARSE_ARGUMENTS(BUNDLE "FILES;DIRECTORIES" "" ${ARGN})
  LIST(GET BUNDLE_DEFAULT_ARGS 0 BUNDLE_NAME)
  SET(__bundleConfig
${CMAKE_CURRENT_BINARY_DIR}/CPackConfig-${BUNDLE_NAME}-bundle.cmake)
  CONFIGURE_FILE(${PROJECT_SOURCE_DIR}/cmake/CPackConfig.in
${__bundleConfig} @ONLY)

  ADD_CUSTOM_COMMAND(TARGET ${BUNDLE_NAME}
    POST_BUILD
    WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/bundles

    # This is an echo of the command. Running this myself on the command
line works as expected
    COMMAND echo ${BUNDLE_NAME} ${CPACK_COMMAND} --config
"${__bundleConfig}"

    # This is executed for each macro call I did
    COMMAND ${CPACK_COMMAND} --config "${__bundleConfig}"
  )
endmacro(bundle)
------------------------
--
Met vriendelijke groet,

Alexander Broekhuis
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