gtest.cmake

########################### GTEST
# Enable ExternalProject CMake module
INCLUDE(ExternalProject)

# Set default ExternalProject root directory
SET_DIRECTORY_PROPERTIES(PROPERTIES EP_PREFIX ${CMAKE_BINARY_DIR}/3rdparty)

# Add gtest
# http://stackoverflow.com/questions/9689183/cmake-googletest
ExternalProject_Add(
    googletest
    URL https://googletest.googlecode.com/files/gtest-1.7.0.zip
    # TIMEOUT 10
    # # Force separate output paths for debug and release builds to allow easy
    # # identification of correct lib in subsequent TARGET_LINK_LIBRARIES commands
    CMAKE_ARGS -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY_DEBUG:PATH=Debug
               -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY_RELEASE:PATH=Release
               -Dgtest_force_shared_crt=ON
    # Disable install step
    INSTALL_COMMAND ""
    # Wrap download, configure and build steps in a script to log output
    LOG_DOWNLOAD ON
    LOG_CONFIGURE ON
    LOG_BUILD ON)

# Specify include dir
ExternalProject_Get_Property(googletest source_dir)
set(GTEST_INCLUDE_DIR ${source_dir}/include)

# Library
ExternalProject_Get_Property(googletest binary_dir)

set(GTEST_LIBRARIES gtest)
add_library(${GTEST_LIBRARIES} UNKNOWN IMPORTED)
set_property(TARGET ${GTEST_LIBRARIES} PROPERTY 
					IMPORTED_LOCATION_DEBUG "${binary_dir}/Debug/${CMAKE_FIND_LIBRARY_PREFIXES}${GTEST_LIBRARIES}${CMAKE_FIND_LIBRARY_SUFFIXES}")
set_property(TARGET ${GTEST_LIBRARIES} PROPERTY
					IMPORTED_LOCATION_RELEASE "${binary_dir}/Release/${CMAKE_FIND_LIBRARY_PREFIXES}${GTEST_LIBRARIES}${CMAKE_FIND_LIBRARY_SUFFIXES}")
add_dependencies(${GTEST_LIBRARIES} googletest)
					
set(GTEST_MAIN_LIBRARIES gtest_main)
add_library(${GTEST_MAIN_LIBRARIES} UNKNOWN IMPORTED)
set_property(TARGET ${GTEST_MAIN_LIBRARIES} PROPERTY 
					IMPORTED_LOCATION_DEBUG "${binary_dir}/Debug/${CMAKE_FIND_LIBRARY_PREFIXES}${GTEST_MAIN_LIBRARIES}${CMAKE_FIND_LIBRARY_SUFFIXES}")
set_property(TARGET ${GTEST_MAIN_LIBRARIES} PROPERTY 					
					IMPORTED_LOCATION_RELEASE "${binary_dir}/Release/${CMAKE_FIND_LIBRARY_PREFIXES}${GTEST_MAIN_LIBRARIES}${CMAKE_FIND_LIBRARY_SUFFIXES}")					
add_dependencies(${GTEST_MAIN_LIBRARIES} googletest)

set(GTEST_BOTH_LIBRARIES ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES})

Tried this because it looked really clean but am getting:

Manually-specified variables were not used by the project:
    CMAKE_ARCHIVE_OUTPUT_DIRECTORY_DEBUG
    CMAKE_ARCHIVE_OUTPUT_DIRECTORY_RELEASE

From the gtest build using cmake 3.3.2. Any ideas?