############################################################################
#
# Copyright (c) 2019 PX4 Development Team. All rights reserved.
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# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
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# 1. Redistributions of source code must retain the above copyright
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# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with the
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# 3. Neither the name PX4 nor the names of its contributors may be
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############################################################################

# Download and unpack googletest at configure time
configure_file(${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in googletest-download/CMakeLists.txt)
execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" . RESULT_VARIABLE result1 WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download)
execute_process(COMMAND ${CMAKE_COMMAND} --build . RESULT_VARIABLE result2 WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download)
if(result1 OR result2)
	message(FATAL_ERROR "Preparing googletest failed: ${result1} ${result2}")
endif()

# Add googletest, defines gtest and gtest_main targets
add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/googletest-src ${CMAKE_CURRENT_BINARY_DIR}/googletest-build EXCLUDE_FROM_ALL)

# Remove visibility.h from the compile flags for gtest because of poisoned exit()
get_target_property(GTEST_COMPILE_FLAGS gtest COMPILE_OPTIONS)
list(REMOVE_ITEM GTEST_COMPILE_FLAGS "-include")
list(REMOVE_ITEM GTEST_COMPILE_FLAGS "visibility.h")
# Remove float warnings added by PX4 which trigger in gtest-printers.h
list(REMOVE_ITEM GTEST_COMPILE_FLAGS "-Wdouble-promotion")
list(REMOVE_ITEM GTEST_COMPILE_FLAGS "-Wfloat-equal")
set_target_properties(gtest PROPERTIES COMPILE_OPTIONS "${GTEST_COMPILE_FLAGS}")