CTK/CMake/Testing/SuperBuildTest/TheExternals/TheExternal_LibA.cmake

#
# LibA
#

superbuild_include_once()

set(proj LibA)

set(${proj}_DEPENDENCIES "")

superbuild_include_dependencies(PROJECT_VAR proj)

if(${CMAKE_PROJECT_NAME}_USE_SYSTEM_${proj})
  message(FATAL_ERROR "Enabling ${CMAKE_PROJECT_NAME}_USE_SYSTEM_${proj} is not supported !")
endif()

mark_as_superbuild(
  VARS ${CMAKE_PROJECT_NAME}_USE_SYSTEM_${proj}:BOOL
  LABELS "USE_SYSTEM"
  )

# Sanity checks
if(DEFINED LibA_DIR AND NOT EXISTS ${LibA_DIR})
  message(FATAL_ERROR "LibA_DIR variable is defined but corresponds to non-existing directory")
endif()

if(NOT DEFINED LibA_DIR AND NOT ${CMAKE_PROJECT_NAME}_USE_SYSTEM_${proj})

  ExternalProject_Add(${proj}
    ${${proj}_EXTERNAL_PROJECT_ARGS}
    SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/${proj}
    BINARY_DIR ${proj}-build
    DOWNLOAD_COMMAND ""
    BUILD_COMMAND ""
    INSTALL_COMMAND ""
    DEPENDS
      ${${proj}_DEPENDENCIES}
    )
  set(LibA_DIR ${CMAKE_BINARY_DIR}/${proj}-build)

else()
  superbuild_add_empty_external_project(${proj} "${${proj}_DEPENDENCIES}")
endif()

mark_as_superbuild(
  VARS LibA_DIR:PATH
  LABELS "FIND_PACKAGE"
  )