CMakeLists.txt: Fix double build

Author: hosiet

CMakeLists.txt

@@ -73,31 +73,25 @@ foreach (MANDIR ${MANDIR_LIST})
  "bash" "-c" "'cat;${CURRENT_MAN_PAGE}|${APPEND_COLOPHON_COMMAND}|opencc;-c;s2twp.json;>;${PROCESS_OUTPUT_ZHTW}'")
 
  if (ENABLE_ZHCN)
- add_custom_target(man_zhcn_${MAN_PAGE_NAME}_dir
- COMMAND ${CMAKE_COMMAND} -E make_directory
- ${MAN_PAGE_PREPAREDIR_ZHCN}
- OUTPUT ${MAN_PAGE_PREPAREDIR_ZHCN}
+ add_custom_command(OUTPUT ${PROCESS_OUTPUT_ZHCN}
+ COMMAND ${CMAKE_COMMAND} -E make_directory ${MAN_PAGE_PREPAREDIR_ZHCN}
+ COMMAND ${PROCESS_COMMAND_ZHCN}
  )
  add_custom_target(man_zhcn_${MAN_PAGE_NAME}_build
- COMMAND ${PROCESS_COMMAND_ZHCN}
- OUTPUT ${PROCESS_OUTPUT_ZHCN}
+ DEPENDS ${PROCESS_OUTPUT_ZHCN}
  )
  add_dependencies(man man_zhcn_${MAN_PAGE_NAME}_build)
- add_dependencies(man_zhcn_${MAN_PAGE_NAME}_build man_zhcn_${MAN_PAGE_NAME}_dir)
  cmake_print_variables(PROCESS_COMMAND_ZHCN)
  endif (ENABLE_ZHCN)
  if (ENABLE_ZHTW)
- add_custom_target(man_zhtw_${MAN_PAGE_NAME}_dir
- COMMAND ${CMAKE_COMMAND} -E make_directory
- ${MAN_PAGE_PREPAREDIR_ZHTW}
- OUTPUT ${MAN_PAGE_PREPAREDIR_ZHTW}
+ add_custom_command(OUTPUT ${PROCESS_OUTPUT_ZHTW}
+ COMMAND ${CMAKE_COMMAND} -E make_directory ${MAN_PAGE_PREPAREDIR_ZHTW}
+ COMMAND ${PROCESS_COMMAND_ZHTW}
  )
  add_custom_target(man_zhtw_${MAN_PAGE_NAME}_build
- COMMAND ${PROCESS_COMMAND_ZHTW}
- OUTPUT ${PROCESS_OUTPUT_ZHTW}
+ DEPENDS ${PROCESS_OUTPUT_ZHTW}
  )
  add_dependencies(man man_zhtw_${MAN_PAGE_NAME}_build)
- add_dependencies(man_zhtw_${MAN_PAGE_NAME}_build man_zhtw_${MAN_PAGE_NAME}_dir)
  endif (ENABLE_ZHTW)
 
  endforeach ()