# Download and unpack googletest at configure time
message(STATUS "Getting gtests...")
message(STATUS "** NOTE ** If there's an issue connecting to GitHub, add a proxy to the download link in file flightlib/cmake/gtest_download.cmake.")

configure_file(cmake/gtest_download.cmake ${PROJECT_SOURCE_DIR}/externals/googletest-download/CMakeLists.txt)
execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
  RESULT_VARIABLE result
  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/externals/googletest-download
  OUTPUT_QUIET)
if(result)
  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
endif()
execute_process(COMMAND ${CMAKE_COMMAND} --build .
  RESULT_VARIABLE result
  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/externals/googletest-download
  OUTPUT_QUIET)
if(result)
  message(FATAL_ERROR "Build step for googletest failed: ${result}")
endif()

message(STATUS "gtests downloaded!")

# Prevent overriding the parent project's compiler/linker
# settings on Windows
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)

# Add googletest directly to our build. This defines
# the gtest and gtest_main targets.
add_subdirectory(${PROJECT_SOURCE_DIR}/externals/googletest-src
                 ${PROJECT_SOURCE_DIR}/externals/googletest-build
                 EXCLUDE_FROM_ALL)

# The gtest/gtest_main targets carry header search path
# dependencies automatically when using CMake 2.8.11 or
# later. Otherwise we have to add them here ourselves.
if (CMAKE_VERSION VERSION_LESS 2.8.11)
  include_directories("${gtest_SOURCE_DIR}/include")
endif()