Development/Tutorials/D-Bus/Accessing Interfaces/PkgConfigGetVar.cmake

<syntaxhighlight lang="text">include(UsePkgConfig)

MACRO(PKGCONFIG_GETVAR _package _var _output_variable)

 SET(${_output_variable})

 # if pkg-config has been found
 IF(PKGCONFIG_EXECUTABLE)

   EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --exists RETURN_VALUE _return_VALUE OUTPUT_VARIABLE _pkgconfigDevNull )

   # and if the package of interest also exists for pkg-config, then get the information
   IF(NOT _return_VALUE)

     EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --variable ${_var} OUTPUT_VARIABLE ${_output_variable} )

   ENDIF(NOT _return_VALUE)

 ENDIF(PKGCONFIG_EXECUTABLE)

ENDMACRO(PKGCONFIG_GETVAR _package _var _output_variable)

macro(dbus_add_activation_service _sources)

   PKGCONFIG_GETVAR(dbus-1 session_bus_services_dir _install_dir)
   foreach (_i ${_sources})
       get_filename_component(_service_file ${_i} ABSOLUTE)
       string(REGEX REPLACE "\\.service.*$" ".service" _output_file ${_i})
       set(_target ${CMAKE_CURRENT_BINARY_DIR}/${_output_file})
       configure_file(${_service_file} ${_target})
       install(FILES ${_target} DESTINATION ${_install_dir})
   endforeach (_i ${ARGN})

endmacro(dbus_add_activation_service _sources)