# ~~~
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# Copyright (c) 2018 Valve Corporation
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# Copyright (c) 2018 LunarG, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ~~~
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# Add your optional dependencies in this "external" directory.
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# googletest is an optional external dependency for this repo.
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if(BUILD_TESTS)
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# Attempt to enable googletest if available.
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# Suppress all warnings from external projects (i.e.: in this directory's scope).
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if(CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
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set_property(DIRECTORY APPEND PROPERTY COMPILE_OPTIONS "-w")
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endif()
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if(TARGET gtest_main)
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# Already enabled as a target (perhaps by a project enclosing this one)
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message(STATUS "Vulkan-ValidationLayers/external: " "googletest already configured - using it")
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elseif(IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/googletest")
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# The googletest directory exists, so enable it as a target.
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message(STATUS "Vulkan-ValidationLayers/external: " "googletest found - configuring it for tests")
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set(BUILD_GTEST ON CACHE BOOL "Builds the googletest subproject")
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set(BUILD_GMOCK OFF CACHE BOOL "Builds the googlemock subproject")
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set(gtest_force_shared_crt ON CACHE BOOL "Link gtest runtimes dynamically")
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set(BUILD_SHARED_LIBS ON CACHE BOOL "Build shared libraries")
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# EXCLUDE_FROM_ALL keeps the install target from installing GTEST files.
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add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/googletest" EXCLUDE_FROM_ALL)
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else()
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message(SEND_ERROR "Vulkan-ValidationLayers/external: " "Google Test was not found. "
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"Provide Google Test in external/googletest or set BUILD_TESTS=OFF")
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endif()
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endif()
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