CMake/AbseilHelpers.cmake - third_party/github/abseil/abseil-cpp - Git at Google

 #
 # Copyright 2017 The Abseil Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #    https://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #

 include(CMakeParseArguments)
 include(AbseilConfigureCopts)
 include(AbseilDll)
 include(AbseilInstallDirs)

 # The IDE folder for Abseil that will be used if Abseil is included in a CMake
 # project that sets
 #    set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 # For example, Visual Studio supports folders.
 set(ABSL_IDE_FOLDER Abseil)

 # absl_cc_library()
 #
 # CMake function to imitate Bazel's cc_library rule.
 #
 # Parameters:
 # NAME: name of target (see Note)
 # HDRS: List of public header files for the library
 # SRCS: List of source files for the library
 # DEPS: List of other libraries to be linked in to the binary targets
 # COPTS: List of private compile options
 # DEFINES: List of public defines
 # LINKOPTS: List of link options
 # PUBLIC: Add this so that this library will be exported under absl::
 # Also in IDE, target will appear in Abseil folder while non PUBLIC will be in Abseil/internal.
 # TESTONLY: When added, this target will only be built if user passes -DABSL_RUN_TESTS=ON to CMake.
 #
 # Note:
 # By default, absl_cc_library will always create a library named absl_${NAME},
 # and alias target absl::${NAME}.  The absl:: form should always be used.
 # This is to reduce namespace pollution.
 #
 # absl_cc_library(
 #   NAME
 #     awesome
 #   HDRS
 #     "a.h"
 #   SRCS
 #     "a.cc"
 # )
 # absl_cc_library(
 #   NAME
 #     fantastic_lib
 #   SRCS
 #     "b.cc"
 #   DEPS
 #     absl::awesome # not "awesome" !
 #   PUBLIC
 # )
 #
 # absl_cc_library(
 #   NAME
 #     main_lib
 #   ...
 #   DEPS
 #     absl::fantastic_lib
 # )
 #
 # TODO: Implement "ALWAYSLINK"
 function(absl_cc_library)
   cmake_parse_arguments(ABSL_CC_LIB
     "DISABLE_INSTALL;PUBLIC;TESTONLY"
     "NAME"
     "HDRS;SRCS;COPTS;DEFINES;LINKOPTS;DEPS"
     ${ARGN}
   )

   if(ABSL_CC_LIB_TESTONLY AND NOT ABSL_RUN_TESTS)
     return()
   endif()

   if(ABSL_ENABLE_INSTALL)
     set(_NAME "${ABSL_CC_LIB_NAME}")
   else()
     set(_NAME "absl_${ABSL_CC_LIB_NAME}")
   endif()

   # Check if this is a header-only library
   # Note that as of February 2019, many popular OS's (for example, Ubuntu
   # 16.04 LTS) only come with cmake 3.5 by default.  For this reason, we can't
   # use list(FILTER...)
   set(ABSL_CC_SRCS "${ABSL_CC_LIB_SRCS}")
   foreach(src_file IN LISTS ABSL_CC_SRCS)
     if(${src_file} MATCHES ".*\\.(h|inc)")
       list(REMOVE_ITEM ABSL_CC_SRCS "${src_file}")
     endif()
   endforeach()

   if("${ABSL_CC_SRCS}" STREQUAL "")
     set(ABSL_CC_LIB_IS_INTERFACE 1)
   else()
     set(ABSL_CC_LIB_IS_INTERFACE 0)
   endif()

   # Determine this build target's relationship to the DLL. It's one of four things:
   # 1. "dll"     -- This target is part of the DLL
   # 2. "dll_dep" -- This target is not part of the DLL, but depends on the DLL.
   #                 Note that we assume any target not in the DLL depends on the
   #                 DLL. This is not a technical necessity but a convenience
   #                 which happens to be true, because nearly every target is
   #                 part of the DLL.
   # 3. "shared"  -- This is a shared library, perhaps on a non-windows platform
   #                 where DLL doesn't make sense.
   # 4. "static"  -- This target does not depend on the DLL and should be built
   #                 statically.
   if (${ABSL_BUILD_DLL})
     absl_internal_dll_contains(TARGET ${_NAME} OUTPUT _in_dll)
     if (${_in_dll})
       # This target should be replaced by the DLL
       set(_build_type "dll")
       set(ABSL_CC_LIB_IS_INTERFACE 1)
     else()
       # Building a DLL, but this target is not part of the DLL
       set(_build_type "dll_dep")
     endif()
   elseif(BUILD_SHARED_LIBS)
     set(_build_type "shared")
   else()
     set(_build_type "static")
   endif()

   if(NOT ABSL_CC_LIB_IS_INTERFACE)
     if(${_build_type} STREQUAL "dll_dep")
       # This target depends on the DLL. When adding dependencies to this target,
       # any depended-on-target which is contained inside the DLL is replaced
       # with a dependency on the DLL.
       add_library(${_NAME} STATIC "")
       target_sources(${_NAME} PRIVATE ${ABSL_CC_LIB_SRCS} ${ABSL_CC_LIB_HDRS})
       absl_internal_dll_targets(
         DEPS ${ABSL_CC_LIB_DEPS}
         OUTPUT _dll_deps
       )
       target_link_libraries(${_NAME}
         PUBLIC ${_dll_deps}
         PRIVATE
           ${ABSL_CC_LIB_LINKOPTS}
           ${ABSL_DEFAULT_LINKOPTS}
       )

       if (ABSL_CC_LIB_TESTONLY)
         set(_gtest_link_define "GTEST_LINKED_AS_SHARED_LIBRARY=1")
       else()
         set(_gtest_link_define)
       endif()

       target_compile_definitions(${_NAME}
         PUBLIC
           ABSL_CONSUME_DLL
           "${_gtest_link_define}"
       )

     elseif(${_build_type} STREQUAL "static" OR ${_build_type} STREQUAL "shared")
       add_library(${_NAME} "")
       target_sources(${_NAME} PRIVATE ${ABSL_CC_LIB_SRCS} ${ABSL_CC_LIB_HDRS})
       target_link_libraries(${_NAME}
       PUBLIC ${ABSL_CC_LIB_DEPS}
       PRIVATE
         ${ABSL_CC_LIB_LINKOPTS}
         ${ABSL_DEFAULT_LINKOPTS}
       )
     else()
       message(FATAL_ERROR "Invalid build type: ${_build_type}")
     endif()

     # Linker language can be inferred from sources, but in the case of DLLs we
     # don't have any .cc files so it would be ambiguous. We could set it
     # explicitly only in the case of DLLs but, because "CXX" is always the
     # correct linker language for static or for shared libraries, we set it
     # unconditionally.
     set_property(TARGET ${_NAME} PROPERTY LINKER_LANGUAGE "CXX")

     target_include_directories(${_NAME}
       PUBLIC
         "$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>"
         $<INSTALL_INTERFACE:${ABSL_INSTALL_INCLUDEDIR}>
     )
     target_compile_options(${_NAME}
       PRIVATE ${ABSL_CC_LIB_COPTS})
     target_compile_definitions(${_NAME} PUBLIC ${ABSL_CC_LIB_DEFINES})

     # Add all Abseil targets to a a folder in the IDE for organization.
     if(ABSL_CC_LIB_PUBLIC)
       set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER})
     elseif(ABSL_CC_LIB_TESTONLY)
       set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/test)
     else()
       set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/internal)
     endif()

     # INTERFACE libraries can't have the CXX_STANDARD property set
     set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${ABSL_CXX_STANDARD})
     set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)

     # When being installed, we lose the absl_ prefix.  We want to put it back
     # to have properly named lib files.  This is a no-op when we are not being
     # installed.
     if(ABSL_ENABLE_INSTALL)
       set_target_properties(${_NAME} PROPERTIES
         OUTPUT_NAME "absl_${_NAME}"
       )
     endif()
   else()
     # Generating header-only library
     add_library(${_NAME} INTERFACE)
     target_include_directories(${_NAME}
       INTERFACE
         "$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>"
         $<INSTALL_INTERFACE:${ABSL_INSTALL_INCLUDEDIR}>
       )

     if (${_build_type} STREQUAL "dll")
         set(ABSL_CC_LIB_DEPS abseil_dll)
     endif()

     target_link_libraries(${_NAME}
       INTERFACE
         ${ABSL_CC_LIB_DEPS}
         ${ABSL_CC_LIB_LINKOPTS}
         ${ABSL_DEFAULT_LINKOPTS}
     )
     target_compile_definitions(${_NAME} INTERFACE ${ABSL_CC_LIB_DEFINES})
   endif()

   # TODO currently we don't install googletest alongside abseil sources, so
   # installed abseil can't be tested.
   if(NOT ABSL_CC_LIB_TESTONLY AND ABSL_ENABLE_INSTALL)
     install(TARGETS ${_NAME} EXPORT ${PROJECT_NAME}Targets
           RUNTIME DESTINATION ${ABSL_INSTALL_BINDIR}
           LIBRARY DESTINATION ${ABSL_INSTALL_LIBDIR}
           ARCHIVE DESTINATION ${ABSL_INSTALL_LIBDIR}
     )
   endif()

     add_library(absl::${ABSL_CC_LIB_NAME} ALIAS ${_NAME})
 endfunction()

 # absl_cc_test()
 #
 # CMake function to imitate Bazel's cc_test rule.
 #
 # Parameters:
 # NAME: name of target (see Usage below)
 # SRCS: List of source files for the binary
 # DEPS: List of other libraries to be linked in to the binary targets
 # COPTS: List of private compile options
 # DEFINES: List of public defines
 # LINKOPTS: List of link options
 #
 # Note:
 # By default, absl_cc_test will always create a binary named absl_${NAME}.
 # This will also add it to ctest list as absl_${NAME}.
 #
 # Usage:
 # absl_cc_library(
 #   NAME
 #     awesome
 #   HDRS
 #     "a.h"
 #   SRCS
 #     "a.cc"
 #   PUBLIC
 # )
 #
 # absl_cc_test(
 #   NAME
 #     awesome_test
 #   SRCS
 #     "awesome_test.cc"
 #   DEPS
 #     absl::awesome
 #     gmock
 #     gtest_main
 # )
 function(absl_cc_test)
   if(NOT ABSL_RUN_TESTS)
     return()
   endif()

   cmake_parse_arguments(ABSL_CC_TEST
     ""
     "NAME"
     "SRCS;COPTS;DEFINES;LINKOPTS;DEPS"
     ${ARGN}
   )

   set(_NAME "absl_${ABSL_CC_TEST_NAME}")

   add_executable(${_NAME} "")
   target_sources(${_NAME} PRIVATE ${ABSL_CC_TEST_SRCS})
   target_include_directories(${_NAME}
     PUBLIC ${ABSL_COMMON_INCLUDE_DIRS}
     PRIVATE ${GMOCK_INCLUDE_DIRS} ${GTEST_INCLUDE_DIRS}
   )

   if (${ABSL_BUILD_DLL})
     target_compile_definitions(${_NAME}
       PUBLIC
         ${ABSL_CC_TEST_DEFINES}
         ABSL_CONSUME_DLL
         GTEST_LINKED_AS_SHARED_LIBRARY=1
     )

     # Replace dependencies on targets inside the DLL with abseil_dll itself.
     absl_internal_dll_targets(
       DEPS ${ABSL_CC_TEST_DEPS}
       OUTPUT ABSL_CC_TEST_DEPS
     )
   else()
     target_compile_definitions(${_NAME}
       PUBLIC
         ${ABSL_CC_TEST_DEFINES}
     )
   endif()
   target_compile_options(${_NAME}
     PRIVATE ${ABSL_CC_TEST_COPTS}
   )

   target_link_libraries(${_NAME}
     PUBLIC ${ABSL_CC_TEST_DEPS}
     PRIVATE ${ABSL_CC_TEST_LINKOPTS}
   )
   # Add all Abseil targets to a folder in the IDE for organization.
   set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/test)

   set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${ABSL_CXX_STANDARD})
   set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)

   add_test(NAME ${_NAME} COMMAND ${_NAME})
 endfunction()


 function(check_target my_target)
   if(NOT TARGET ${my_target})
     message(FATAL_ERROR " ABSL: compiling absl requires a ${my_target} CMake target in your project,
                    see CMake/README.md for more details")
   endif(NOT TARGET ${my_target})
 endfunction()
	#
	# Copyright 2017 The Abseil Authors.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# https://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	#

	include(CMakeParseArguments)
	include(AbseilConfigureCopts)
	include(AbseilDll)
	include(AbseilInstallDirs)

	# The IDE folder for Abseil that will be used if Abseil is included in a CMake
	# project that sets
	# set_property(GLOBAL PROPERTY USE_FOLDERS ON)
	# For example, Visual Studio supports folders.
	set(ABSL_IDE_FOLDER Abseil)

	# absl_cc_library()
	#
	# CMake function to imitate Bazel's cc_library rule.
	#
	# Parameters:
	# NAME: name of target (see Note)
	# HDRS: List of public header files for the library
	# SRCS: List of source files for the library
	# DEPS: List of other libraries to be linked in to the binary targets
	# COPTS: List of private compile options
	# DEFINES: List of public defines
	# LINKOPTS: List of link options
	# PUBLIC: Add this so that this library will be exported under absl::
	# Also in IDE, target will appear in Abseil folder while non PUBLIC will be in Abseil/internal.
	# TESTONLY: When added, this target will only be built if user passes -DABSL_RUN_TESTS=ON to CMake.
	#
	# Note:
	# By default, absl_cc_library will always create a library named absl_${NAME},
	# and alias target absl::${NAME}. The absl:: form should always be used.
	# This is to reduce namespace pollution.
	#
	# absl_cc_library(
	# NAME
	# awesome
	# HDRS
	# "a.h"
	# SRCS
	# "a.cc"
	# )
	# absl_cc_library(
	# NAME
	# fantastic_lib
	# SRCS
	# "b.cc"
	# DEPS
	# absl::awesome # not "awesome" !
	# PUBLIC
	# )
	#
	# absl_cc_library(
	# NAME
	# main_lib
	# ...
	# DEPS
	# absl::fantastic_lib
	# )
	#
	# TODO: Implement "ALWAYSLINK"
	function(absl_cc_library)
	cmake_parse_arguments(ABSL_CC_LIB
	"DISABLE_INSTALL;PUBLIC;TESTONLY"
	"NAME"
	"HDRS;SRCS;COPTS;DEFINES;LINKOPTS;DEPS"
	${ARGN}
	)

	if(ABSL_CC_LIB_TESTONLY AND NOT ABSL_RUN_TESTS)
	return()
	endif()

	if(ABSL_ENABLE_INSTALL)
	set(_NAME "${ABSL_CC_LIB_NAME}")
	else()
	set(_NAME "absl_${ABSL_CC_LIB_NAME}")
	endif()

	# Check if this is a header-only library
	# Note that as of February 2019, many popular OS's (for example, Ubuntu
	# 16.04 LTS) only come with cmake 3.5 by default. For this reason, we can't
	# use list(FILTER...)
	set(ABSL_CC_SRCS "${ABSL_CC_LIB_SRCS}")
	foreach(src_file IN LISTS ABSL_CC_SRCS)
	if(${src_file} MATCHES ".*\\.(h\|inc)")
	list(REMOVE_ITEM ABSL_CC_SRCS "${src_file}")
	endif()
	endforeach()

	if("${ABSL_CC_SRCS}" STREQUAL "")
	set(ABSL_CC_LIB_IS_INTERFACE 1)
	else()
	set(ABSL_CC_LIB_IS_INTERFACE 0)
	endif()

	# Determine this build target's relationship to the DLL. It's one of four things:
	# 1. "dll" -- This target is part of the DLL
	# 2. "dll_dep" -- This target is not part of the DLL, but depends on the DLL.
	# Note that we assume any target not in the DLL depends on the
	# DLL. This is not a technical necessity but a convenience
	# which happens to be true, because nearly every target is
	# part of the DLL.
	# 3. "shared" -- This is a shared library, perhaps on a non-windows platform
	# where DLL doesn't make sense.
	# 4. "static" -- This target does not depend on the DLL and should be built
	# statically.
	if (${ABSL_BUILD_DLL})
	absl_internal_dll_contains(TARGET ${_NAME} OUTPUT _in_dll)
	if (${_in_dll})
	# This target should be replaced by the DLL
	set(_build_type "dll")
	set(ABSL_CC_LIB_IS_INTERFACE 1)
	else()
	# Building a DLL, but this target is not part of the DLL
	set(_build_type "dll_dep")
	endif()
	elseif(BUILD_SHARED_LIBS)
	set(_build_type "shared")
	else()
	set(_build_type "static")
	endif()

	if(NOT ABSL_CC_LIB_IS_INTERFACE)
	if(${_build_type} STREQUAL "dll_dep")
	# This target depends on the DLL. When adding dependencies to this target,
	# any depended-on-target which is contained inside the DLL is replaced
	# with a dependency on the DLL.
	add_library(${_NAME} STATIC "")
	target_sources(${_NAME} PRIVATE ${ABSL_CC_LIB_SRCS} ${ABSL_CC_LIB_HDRS})
	absl_internal_dll_targets(
	DEPS ${ABSL_CC_LIB_DEPS}
	OUTPUT _dll_deps
	)
	target_link_libraries(${_NAME}
	PUBLIC ${_dll_deps}
	PRIVATE
	${ABSL_CC_LIB_LINKOPTS}
	${ABSL_DEFAULT_LINKOPTS}
	)

	if (ABSL_CC_LIB_TESTONLY)
	set(_gtest_link_define "GTEST_LINKED_AS_SHARED_LIBRARY=1")
	else()
	set(_gtest_link_define)
	endif()

	target_compile_definitions(${_NAME}
	PUBLIC
	ABSL_CONSUME_DLL
	"${_gtest_link_define}"
	)

	elseif(${_build_type} STREQUAL "static" OR ${_build_type} STREQUAL "shared")
	add_library(${_NAME} "")
	target_sources(${_NAME} PRIVATE ${ABSL_CC_LIB_SRCS} ${ABSL_CC_LIB_HDRS})
	target_link_libraries(${_NAME}
	PUBLIC ${ABSL_CC_LIB_DEPS}
	PRIVATE
	${ABSL_CC_LIB_LINKOPTS}
	${ABSL_DEFAULT_LINKOPTS}
	)
	else()
	message(FATAL_ERROR "Invalid build type: ${_build_type}")
	endif()

	# Linker language can be inferred from sources, but in the case of DLLs we
	# don't have any .cc files so it would be ambiguous. We could set it
	# explicitly only in the case of DLLs but, because "CXX" is always the
	# correct linker language for static or for shared libraries, we set it
	# unconditionally.
	set_property(TARGET ${_NAME} PROPERTY LINKER_LANGUAGE "CXX")

	target_include_directories(${_NAME}
	PUBLIC
	"$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>"
	$<INSTALL_INTERFACE:${ABSL_INSTALL_INCLUDEDIR}>
	)
	target_compile_options(${_NAME}
	PRIVATE ${ABSL_CC_LIB_COPTS})
	target_compile_definitions(${_NAME} PUBLIC ${ABSL_CC_LIB_DEFINES})

	# Add all Abseil targets to a a folder in the IDE for organization.
	if(ABSL_CC_LIB_PUBLIC)
	set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER})
	elseif(ABSL_CC_LIB_TESTONLY)
	set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/test)
	else()
	set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/internal)
	endif()

	# INTERFACE libraries can't have the CXX_STANDARD property set
	set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${ABSL_CXX_STANDARD})
	set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)

	# When being installed, we lose the absl_ prefix. We want to put it back
	# to have properly named lib files. This is a no-op when we are not being
	# installed.
	if(ABSL_ENABLE_INSTALL)
	set_target_properties(${_NAME} PROPERTIES
	OUTPUT_NAME "absl_${_NAME}"
	)
	endif()
	else()
	# Generating header-only library
	add_library(${_NAME} INTERFACE)
	target_include_directories(${_NAME}
	INTERFACE
	"$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>"
	$<INSTALL_INTERFACE:${ABSL_INSTALL_INCLUDEDIR}>
	)

	if (${_build_type} STREQUAL "dll")
	set(ABSL_CC_LIB_DEPS abseil_dll)
	endif()

	target_link_libraries(${_NAME}
	INTERFACE
	${ABSL_CC_LIB_DEPS}
	${ABSL_CC_LIB_LINKOPTS}
	${ABSL_DEFAULT_LINKOPTS}
	)
	target_compile_definitions(${_NAME} INTERFACE ${ABSL_CC_LIB_DEFINES})
	endif()

	# TODO currently we don't install googletest alongside abseil sources, so
	# installed abseil can't be tested.
	if(NOT ABSL_CC_LIB_TESTONLY AND ABSL_ENABLE_INSTALL)
	install(TARGETS ${_NAME} EXPORT ${PROJECT_NAME}Targets
	RUNTIME DESTINATION ${ABSL_INSTALL_BINDIR}
	LIBRARY DESTINATION ${ABSL_INSTALL_LIBDIR}
	ARCHIVE DESTINATION ${ABSL_INSTALL_LIBDIR}
	)
	endif()

	add_library(absl::${ABSL_CC_LIB_NAME} ALIAS ${_NAME})
	endfunction()

	# absl_cc_test()
	#
	# CMake function to imitate Bazel's cc_test rule.
	#
	# Parameters:
	# NAME: name of target (see Usage below)
	# SRCS: List of source files for the binary
	# DEPS: List of other libraries to be linked in to the binary targets
	# COPTS: List of private compile options
	# DEFINES: List of public defines
	# LINKOPTS: List of link options
	#
	# Note:
	# By default, absl_cc_test will always create a binary named absl_${NAME}.
	# This will also add it to ctest list as absl_${NAME}.
	#
	# Usage:
	# absl_cc_library(
	# NAME
	# awesome
	# HDRS
	# "a.h"
	# SRCS
	# "a.cc"
	# PUBLIC
	# )
	#
	# absl_cc_test(
	# NAME
	# awesome_test
	# SRCS
	# "awesome_test.cc"
	# DEPS
	# absl::awesome
	# gmock
	# gtest_main
	# )
	function(absl_cc_test)
	if(NOT ABSL_RUN_TESTS)
	return()
	endif()

	cmake_parse_arguments(ABSL_CC_TEST
	""
	"NAME"
	"SRCS;COPTS;DEFINES;LINKOPTS;DEPS"
	${ARGN}
	)

	set(_NAME "absl_${ABSL_CC_TEST_NAME}")

	add_executable(${_NAME} "")
	target_sources(${_NAME} PRIVATE ${ABSL_CC_TEST_SRCS})
	target_include_directories(${_NAME}
	PUBLIC ${ABSL_COMMON_INCLUDE_DIRS}
	PRIVATE ${GMOCK_INCLUDE_DIRS} ${GTEST_INCLUDE_DIRS}
	)

	if (${ABSL_BUILD_DLL})
	target_compile_definitions(${_NAME}
	PUBLIC
	${ABSL_CC_TEST_DEFINES}
	ABSL_CONSUME_DLL
	GTEST_LINKED_AS_SHARED_LIBRARY=1
	)

	# Replace dependencies on targets inside the DLL with abseil_dll itself.
	absl_internal_dll_targets(
	DEPS ${ABSL_CC_TEST_DEPS}
	OUTPUT ABSL_CC_TEST_DEPS
	)
	else()
	target_compile_definitions(${_NAME}
	PUBLIC
	${ABSL_CC_TEST_DEFINES}
	)
	endif()
	target_compile_options(${_NAME}
	PRIVATE ${ABSL_CC_TEST_COPTS}
	)

	target_link_libraries(${_NAME}
	PUBLIC ${ABSL_CC_TEST_DEPS}
	PRIVATE ${ABSL_CC_TEST_LINKOPTS}
	)
	# Add all Abseil targets to a folder in the IDE for organization.
	set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/test)

	set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${ABSL_CXX_STANDARD})
	set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)

	add_test(NAME ${_NAME} COMMAND ${_NAME})
	endfunction()


	function(check_target my_target)
	if(NOT TARGET ${my_target})
	message(FATAL_ERROR " ABSL: compiling absl requires a ${my_target} CMake target in your project,
	see CMake/README.md for more details")
	endif(NOT TARGET ${my_target})
	endfunction()