CMakeLists.txt - platform/external/fmtlib - Git at Google

 cmake_minimum_required(VERSION 3.1.0)

 # Use newer policies if available, up to most recent tested version of CMake.
 if(${CMAKE_VERSION} VERSION_LESS 3.11)
   cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION})
 else()
   cmake_policy(VERSION 3.11)
 endif()

 # Determine if fmt is built as a subproject (using add_subdirectory)
 # or if it is the master project.
 set(MASTER_PROJECT OFF)
 if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
   set(MASTER_PROJECT ON)
   message(STATUS "CMake version: ${CMAKE_VERSION}")
 endif ()

 # Joins arguments and places the results in ${result_var}.
 function(join result_var)
   set(result )
   foreach (arg ${ARGN})
     set(result "${result}${arg}")
   endforeach ()
   set(${result_var} "${result}" PARENT_SCOPE)
 endfunction()

 # Set the default CMAKE_BUILD_TYPE to Release.
 # This should be done before the project command since the latter can set
 # CMAKE_BUILD_TYPE itself (it does so for nmake).
 if (NOT CMAKE_BUILD_TYPE)
   join(doc "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or "
            "CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.")
   set(CMAKE_BUILD_TYPE Release CACHE STRING ${doc})
 endif ()

 option(FMT_PEDANTIC "Enable extra warnings and expensive tests." OFF)
 option(FMT_WERROR "Halt the compilation with an error on compiler warnings." OFF)

 # Options that control generation of various targets.
 option(FMT_DOC "Generate the doc target." ${MASTER_PROJECT})
 option(FMT_INSTALL "Generate the install target." ${MASTER_PROJECT})
 option(FMT_TEST "Generate the test target." ${MASTER_PROJECT})

 project(FMT)

 # Get version from core.h
 file(READ include/fmt/core.h core_h)
 if (NOT core_h MATCHES "FMT_VERSION ([0-9]+)([0-9][0-9])([0-9][0-9])")
   message(FATAL_ERROR "Cannot get FMT_VERSION from core.h.")
 endif ()
 # Use math to skip leading zeros if any.
 math(EXPR CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1})
 math(EXPR CPACK_PACKAGE_VERSION_MINOR ${CMAKE_MATCH_2})
 math(EXPR CPACK_PACKAGE_VERSION_PATCH ${CMAKE_MATCH_3})
 join(FMT_VERSION ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.
                  ${CPACK_PACKAGE_VERSION_PATCH})
 message(STATUS "Version: ${FMT_VERSION}")

 message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")

 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
   "${CMAKE_CURRENT_SOURCE_DIR}/support/cmake")

 include(cxx14)
 include(CheckCXXCompilerFlag)

 if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
   set(PEDANTIC_COMPILE_FLAGS -pedantic-errors -Wall -Wextra -pedantic
       -Wold-style-cast -Wundef
       -Wredundant-decls -Wwrite-strings -Wpointer-arith
       -Wcast-qual -Wformat=2 -Wmissing-include-dirs
       -Wcast-align -Wnon-virtual-dtor
       -Wctor-dtor-privacy -Wdisabled-optimization
       -Winvalid-pch -Woverloaded-virtual
       -Wno-ctor-dtor-privacy -Wno-dangling-else
       -Wno-format-nonliteral -Wno-sign-conversion -Wno-shadow)
   if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
       set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wnoexcept)
   endif ()
   if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
       set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wdouble-promotion
           -Wtrampolines -Wzero-as-null-pointer-constant -Wuseless-cast
           -Wvector-operation-performance -Wsized-deallocation)
   endif ()
   if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0)
       set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wshift-overflow=2
           -Wnull-dereference -Wduplicated-cond)
   endif ()
   set(WERROR_FLAG -Werror)
 endif ()

 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   set(PEDANTIC_COMPILE_FLAGS -Wall -Wextra -pedantic)
   check_cxx_compiler_flag(-Wzero-as-null-pointer-constant HAS_NULLPTR_WARNING)
   if (HAS_NULLPTR_WARNING)
     set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS}
         -Wzero-as-null-pointer-constant)
   endif ()
   set(WERROR_FLAG -Werror)
 endif ()

 if (MSVC)
   set(PEDANTIC_COMPILE_FLAGS /W3)
   set(WERROR_FLAG /WX)
 endif ()

 if (MASTER_PROJECT AND CMAKE_GENERATOR MATCHES "Visual Studio")
   # If Microsoft SDK is installed create script run-msbuild.bat that
   # calls SetEnv.cmd to set up build environment and runs msbuild.
   # It is useful when building Visual Studio projects with the SDK
   # toolchain rather than Visual Studio.
   include(FindSetEnv)
   if (WINSDK_SETENV)
     set(MSBUILD_SETUP "call \"${WINSDK_SETENV}\"")
   endif ()
   # Set FrameworkPathOverride to get rid of MSB3644 warnings.
   set(netfxpath "C:\\Program Files\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0")
   file(WRITE run-msbuild.bat "
     ${MSBUILD_SETUP}
     ${CMAKE_MAKE_PROGRAM} -p:FrameworkPathOverride=\"${netfxpath}\" %*")
 endif ()

 include(CheckSymbolExists)
 if (WIN32)
   check_symbol_exists(open io.h HAVE_OPEN)
 else ()
   check_symbol_exists(open fcntl.h HAVE_OPEN)
 endif ()

 function(add_headers VAR)
   set(headers ${${VAR}})
   foreach (header ${ARGN})
     set(headers ${headers} include/fmt/${header})
   endforeach()
   set(${VAR} ${headers} PARENT_SCOPE)
 endfunction()

 # Define the fmt library, its includes and the needed defines.
 add_headers(FMT_HEADERS chrono.h color.h core.h format.h format-inl.h locale.h
                         ostream.h printf.h time.h ranges.h)
 set(FMT_SOURCES src/format.cc)
 if (HAVE_OPEN)
   add_headers(FMT_HEADERS posix.h)
   set(FMT_SOURCES ${FMT_SOURCES} src/posix.cc)
 endif ()

 add_library(fmt ${FMT_SOURCES} ${FMT_HEADERS} README.rst ChangeLog.rst)
 add_library(fmt::fmt ALIAS fmt)

 if (FMT_WERROR)
   target_compile_options(fmt PRIVATE ${WERROR_FLAG})
 endif ()
 if (FMT_PEDANTIC)
   target_compile_options(fmt PRIVATE ${PEDANTIC_COMPILE_FLAGS})
 endif ()

 target_include_directories(fmt PUBLIC
   $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
   $<INSTALL_INTERFACE:include>)

 set_target_properties(fmt PROPERTIES
   VERSION ${FMT_VERSION} SOVERSION ${CPACK_PACKAGE_VERSION_MAJOR}
   DEBUG_POSTFIX d)

 if (BUILD_SHARED_LIBS)
   if (UNIX AND NOT APPLE)
     # Fix rpmlint warning:
     # unused-direct-shlib-dependency /usr/lib/libformat.so.1.1.0 /lib/libm.so.6.
     target_link_libraries(fmt -Wl,--as-needed)
   endif ()
   target_compile_definitions(fmt PRIVATE FMT_EXPORT INTERFACE FMT_SHARED)
 endif ()

 add_library(fmt-header-only INTERFACE)
 add_library(fmt::fmt-header-only ALIAS fmt-header-only)

 target_compile_definitions(fmt-header-only INTERFACE FMT_HEADER_ONLY=1)

 target_include_directories(fmt-header-only INTERFACE
   $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
   $<INSTALL_INTERFACE:include>)

 # Install targets.
 if (FMT_INSTALL)
   include(GNUInstallDirs)
   include(CMakePackageConfigHelpers)
   set(FMT_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/fmt CACHE STRING
     "Installation directory for cmake files, relative to ${CMAKE_INSTALL_PREFIX}.")
   set(version_config ${PROJECT_BINARY_DIR}/fmt-config-version.cmake)
   set(project_config ${PROJECT_BINARY_DIR}/fmt-config.cmake)
   set(pkgconfig ${PROJECT_BINARY_DIR}/fmt.pc)
   set(targets_export_name fmt-targets)

   set (INSTALL_TARGETS fmt)
   if (TARGET fmt-header-only)
     set(INSTALL_TARGETS ${INSTALL_TARGETS} fmt-header-only)
   endif ()

   set(FMT_LIB_DIR ${CMAKE_INSTALL_LIBDIR} CACHE STRING
       "Installation directory for libraries, relative to ${CMAKE_INSTALL_PREFIX}.")

   set(FMT_INC_DIR ${CMAKE_INSTALL_INCLUDEDIR}/fmt CACHE STRING
       "Installation directory for include files, relative to ${CMAKE_INSTALL_PREFIX}.")

   set(FMT_PKGCONFIG_DIR "${CMAKE_INSTALL_PREFIX}/share/pkgconfig" CACHE PATH
     "Installation directory for pkgconfig (.pc) files, relative to ${CMAKE_INSTALL_PREFIX}.")

   # Generate the version, config and target files into the build directory.
   write_basic_package_version_file(
     ${version_config}
     VERSION ${FMT_VERSION}
     COMPATIBILITY AnyNewerVersion)
   configure_file(
     "${PROJECT_SOURCE_DIR}/support/cmake/fmt.pc.in"
     "${pkgconfig}"
     @ONLY)
   configure_package_config_file(
     ${PROJECT_SOURCE_DIR}/support/cmake/fmt-config.cmake.in
     ${project_config}
     INSTALL_DESTINATION ${FMT_CMAKE_DIR})
   # Use a namespace because CMake provides better diagnostics for namespaced
   # imported targets.
   export(TARGETS ${INSTALL_TARGETS} NAMESPACE fmt::
          FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake)

   # Install version, config and target files.
   install(
     FILES ${project_config} ${version_config}
     DESTINATION ${FMT_CMAKE_DIR})
   install(EXPORT ${targets_export_name} DESTINATION ${FMT_CMAKE_DIR}
           NAMESPACE fmt::)

   # Install the library and headers.
   install(TARGETS ${INSTALL_TARGETS} EXPORT ${targets_export_name}
           DESTINATION ${FMT_LIB_DIR})

   install(FILES $<TARGET_PDB_FILE:${INSTALL_TARGETS}> DESTINATION ${FMT_LIB_DIR} OPTIONAL)
   install(FILES ${FMT_HEADERS} DESTINATION ${FMT_INC_DIR})
   install(FILES "${pkgconfig}" DESTINATION "${FMT_PKGCONFIG_DIR}")
 endif ()

 if (FMT_DOC)
   add_subdirectory(doc)
 endif ()

 if (FMT_TEST)
   enable_testing()
   add_subdirectory(test)
 endif ()

 set(gitignore ${PROJECT_SOURCE_DIR}/.gitignore)
 if (MASTER_PROJECT AND EXISTS ${gitignore})
   # Get the list of ignored files from .gitignore.
   file (STRINGS ${gitignore} lines)
   LIST(REMOVE_ITEM lines /doc/html)
   foreach (line ${lines})
     string(REPLACE "." "[.]" line "${line}")
     string(REPLACE "*" ".*" line "${line}")
     set(ignored_files ${ignored_files} "${line}$" "${line}/")
   endforeach ()
   set(ignored_files ${ignored_files}
     /.git /breathe /format-benchmark sphinx/ .buildinfo .doctrees)

   set(CPACK_SOURCE_GENERATOR ZIP)
   set(CPACK_SOURCE_IGNORE_FILES ${ignored_files})
   set(CPACK_SOURCE_PACKAGE_FILE_NAME fmt-${FMT_VERSION})
   set(CPACK_PACKAGE_NAME fmt)
   set(CPACK_RESOURCE_FILE_README ${PROJECT_SOURCE_DIR}/README.rst)
   include(CPack)
 endif ()
	cmake_minimum_required(VERSION 3.1.0)

	# Use newer policies if available, up to most recent tested version of CMake.
	if(${CMAKE_VERSION} VERSION_LESS 3.11)
	cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION})
	else()
	cmake_policy(VERSION 3.11)
	endif()

	# Determine if fmt is built as a subproject (using add_subdirectory)
	# or if it is the master project.
	set(MASTER_PROJECT OFF)
	if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
	set(MASTER_PROJECT ON)
	message(STATUS "CMake version: ${CMAKE_VERSION}")
	endif ()

	# Joins arguments and places the results in ${result_var}.
	function(join result_var)
	set(result )
	foreach (arg ${ARGN})
	set(result "${result}${arg}")
	endforeach ()
	set(${result_var} "${result}" PARENT_SCOPE)
	endfunction()

	# Set the default CMAKE_BUILD_TYPE to Release.
	# This should be done before the project command since the latter can set
	# CMAKE_BUILD_TYPE itself (it does so for nmake).
	if (NOT CMAKE_BUILD_TYPE)
	join(doc "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or "
	"CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.")
	set(CMAKE_BUILD_TYPE Release CACHE STRING ${doc})
	endif ()

	option(FMT_PEDANTIC "Enable extra warnings and expensive tests." OFF)
	option(FMT_WERROR "Halt the compilation with an error on compiler warnings." OFF)

	# Options that control generation of various targets.
	option(FMT_DOC "Generate the doc target." ${MASTER_PROJECT})
	option(FMT_INSTALL "Generate the install target." ${MASTER_PROJECT})
	option(FMT_TEST "Generate the test target." ${MASTER_PROJECT})

	project(FMT)

	# Get version from core.h
	file(READ include/fmt/core.h core_h)
	if (NOT core_h MATCHES "FMT_VERSION ([0-9]+)([0-9][0-9])([0-9][0-9])")
	message(FATAL_ERROR "Cannot get FMT_VERSION from core.h.")
	endif ()
	# Use math to skip leading zeros if any.
	math(EXPR CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1})
	math(EXPR CPACK_PACKAGE_VERSION_MINOR ${CMAKE_MATCH_2})
	math(EXPR CPACK_PACKAGE_VERSION_PATCH ${CMAKE_MATCH_3})
	join(FMT_VERSION ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.
	${CPACK_PACKAGE_VERSION_PATCH})
	message(STATUS "Version: ${FMT_VERSION}")

	message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")

	set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

	set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
	"${CMAKE_CURRENT_SOURCE_DIR}/support/cmake")

	include(cxx14)
	include(CheckCXXCompilerFlag)

	if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
	set(PEDANTIC_COMPILE_FLAGS -pedantic-errors -Wall -Wextra -pedantic
	-Wold-style-cast -Wundef
	-Wredundant-decls -Wwrite-strings -Wpointer-arith
	-Wcast-qual -Wformat=2 -Wmissing-include-dirs
	-Wcast-align -Wnon-virtual-dtor
	-Wctor-dtor-privacy -Wdisabled-optimization
	-Winvalid-pch -Woverloaded-virtual
	-Wno-ctor-dtor-privacy -Wno-dangling-else
	-Wno-format-nonliteral -Wno-sign-conversion -Wno-shadow)
	if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
	set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wnoexcept)
	endif ()
	if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
	set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wdouble-promotion
	-Wtrampolines -Wzero-as-null-pointer-constant -Wuseless-cast
	-Wvector-operation-performance -Wsized-deallocation)
	endif ()
	if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0)
	set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wshift-overflow=2
	-Wnull-dereference -Wduplicated-cond)
	endif ()
	set(WERROR_FLAG -Werror)
	endif ()

	if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
	set(PEDANTIC_COMPILE_FLAGS -Wall -Wextra -pedantic)
	check_cxx_compiler_flag(-Wzero-as-null-pointer-constant HAS_NULLPTR_WARNING)
	if (HAS_NULLPTR_WARNING)
	set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS}
	-Wzero-as-null-pointer-constant)
	endif ()
	set(WERROR_FLAG -Werror)
	endif ()

	if (MSVC)
	set(PEDANTIC_COMPILE_FLAGS /W3)
	set(WERROR_FLAG /WX)
	endif ()

	if (MASTER_PROJECT AND CMAKE_GENERATOR MATCHES "Visual Studio")
	# If Microsoft SDK is installed create script run-msbuild.bat that
	# calls SetEnv.cmd to set up build environment and runs msbuild.
	# It is useful when building Visual Studio projects with the SDK
	# toolchain rather than Visual Studio.
	include(FindSetEnv)
	if (WINSDK_SETENV)
	set(MSBUILD_SETUP "call \"${WINSDK_SETENV}\"")
	endif ()
	# Set FrameworkPathOverride to get rid of MSB3644 warnings.
	set(netfxpath "C:\\Program Files\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0")
	file(WRITE run-msbuild.bat "
	${MSBUILD_SETUP}
	${CMAKE_MAKE_PROGRAM} -p:FrameworkPathOverride=\"${netfxpath}\" %*")
	endif ()

	include(CheckSymbolExists)
	if (WIN32)
	check_symbol_exists(open io.h HAVE_OPEN)
	else ()
	check_symbol_exists(open fcntl.h HAVE_OPEN)
	endif ()

	function(add_headers VAR)
	set(headers ${${VAR}})
	foreach (header ${ARGN})
	set(headers ${headers} include/fmt/${header})
	endforeach()
	set(${VAR} ${headers} PARENT_SCOPE)
	endfunction()

	# Define the fmt library, its includes and the needed defines.
	add_headers(FMT_HEADERS chrono.h color.h core.h format.h format-inl.h locale.h
	ostream.h printf.h time.h ranges.h)
	set(FMT_SOURCES src/format.cc)
	if (HAVE_OPEN)
	add_headers(FMT_HEADERS posix.h)
	set(FMT_SOURCES ${FMT_SOURCES} src/posix.cc)
	endif ()

	add_library(fmt ${FMT_SOURCES} ${FMT_HEADERS} README.rst ChangeLog.rst)
	add_library(fmt::fmt ALIAS fmt)

	if (FMT_WERROR)
	target_compile_options(fmt PRIVATE ${WERROR_FLAG})
	endif ()
	if (FMT_PEDANTIC)
	target_compile_options(fmt PRIVATE ${PEDANTIC_COMPILE_FLAGS})
	endif ()

	target_include_directories(fmt PUBLIC
	$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
	$<INSTALL_INTERFACE:include>)

	set_target_properties(fmt PROPERTIES
	VERSION ${FMT_VERSION} SOVERSION ${CPACK_PACKAGE_VERSION_MAJOR}
	DEBUG_POSTFIX d)

	if (BUILD_SHARED_LIBS)
	if (UNIX AND NOT APPLE)
	# Fix rpmlint warning:
	# unused-direct-shlib-dependency /usr/lib/libformat.so.1.1.0 /lib/libm.so.6.
	target_link_libraries(fmt -Wl,--as-needed)
	endif ()
	target_compile_definitions(fmt PRIVATE FMT_EXPORT INTERFACE FMT_SHARED)
	endif ()

	add_library(fmt-header-only INTERFACE)
	add_library(fmt::fmt-header-only ALIAS fmt-header-only)

	target_compile_definitions(fmt-header-only INTERFACE FMT_HEADER_ONLY=1)

	target_include_directories(fmt-header-only INTERFACE
	$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
	$<INSTALL_INTERFACE:include>)

	# Install targets.
	if (FMT_INSTALL)
	include(GNUInstallDirs)
	include(CMakePackageConfigHelpers)
	set(FMT_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/fmt CACHE STRING
	"Installation directory for cmake files, relative to ${CMAKE_INSTALL_PREFIX}.")
	set(version_config ${PROJECT_BINARY_DIR}/fmt-config-version.cmake)
	set(project_config ${PROJECT_BINARY_DIR}/fmt-config.cmake)
	set(pkgconfig ${PROJECT_BINARY_DIR}/fmt.pc)
	set(targets_export_name fmt-targets)

	set (INSTALL_TARGETS fmt)
	if (TARGET fmt-header-only)
	set(INSTALL_TARGETS ${INSTALL_TARGETS} fmt-header-only)
	endif ()

	set(FMT_LIB_DIR ${CMAKE_INSTALL_LIBDIR} CACHE STRING
	"Installation directory for libraries, relative to ${CMAKE_INSTALL_PREFIX}.")

	set(FMT_INC_DIR ${CMAKE_INSTALL_INCLUDEDIR}/fmt CACHE STRING
	"Installation directory for include files, relative to ${CMAKE_INSTALL_PREFIX}.")

	set(FMT_PKGCONFIG_DIR "${CMAKE_INSTALL_PREFIX}/share/pkgconfig" CACHE PATH
	"Installation directory for pkgconfig (.pc) files, relative to ${CMAKE_INSTALL_PREFIX}.")

	# Generate the version, config and target files into the build directory.
	write_basic_package_version_file(
	${version_config}
	VERSION ${FMT_VERSION}
	COMPATIBILITY AnyNewerVersion)
	configure_file(
	"${PROJECT_SOURCE_DIR}/support/cmake/fmt.pc.in"
	"${pkgconfig}"
	@ONLY)
	configure_package_config_file(
	${PROJECT_SOURCE_DIR}/support/cmake/fmt-config.cmake.in
	${project_config}
	INSTALL_DESTINATION ${FMT_CMAKE_DIR})
	# Use a namespace because CMake provides better diagnostics for namespaced
	# imported targets.
	export(TARGETS ${INSTALL_TARGETS} NAMESPACE fmt::
	FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake)

	# Install version, config and target files.
	install(
	FILES ${project_config} ${version_config}
	DESTINATION ${FMT_CMAKE_DIR})
	install(EXPORT ${targets_export_name} DESTINATION ${FMT_CMAKE_DIR}
	NAMESPACE fmt::)

	# Install the library and headers.
	install(TARGETS ${INSTALL_TARGETS} EXPORT ${targets_export_name}
	DESTINATION ${FMT_LIB_DIR})

	install(FILES $<TARGET_PDB_FILE:${INSTALL_TARGETS}> DESTINATION ${FMT_LIB_DIR} OPTIONAL)
	install(FILES ${FMT_HEADERS} DESTINATION ${FMT_INC_DIR})
	install(FILES "${pkgconfig}" DESTINATION "${FMT_PKGCONFIG_DIR}")
	endif ()

	if (FMT_DOC)
	add_subdirectory(doc)
	endif ()

	if (FMT_TEST)
	enable_testing()
	add_subdirectory(test)
	endif ()

	set(gitignore ${PROJECT_SOURCE_DIR}/.gitignore)
	if (MASTER_PROJECT AND EXISTS ${gitignore})
	# Get the list of ignored files from .gitignore.
	file (STRINGS ${gitignore} lines)
	LIST(REMOVE_ITEM lines /doc/html)
	foreach (line ${lines})
	string(REPLACE "." "[.]" line "${line}")
	string(REPLACE "" "." line "${line}")
	set(ignored_files ${ignored_files} "${line}$" "${line}/")
	endforeach ()
	set(ignored_files ${ignored_files}
	/.git /breathe /format-benchmark sphinx/ .buildinfo .doctrees)

	set(CPACK_SOURCE_GENERATOR ZIP)
	set(CPACK_SOURCE_IGNORE_FILES ${ignored_files})
	set(CPACK_SOURCE_PACKAGE_FILE_NAME fmt-${FMT_VERSION})
	set(CPACK_PACKAGE_NAME fmt)
	set(CPACK_RESOURCE_FILE_README ${PROJECT_SOURCE_DIR}/README.rst)
	include(CPack)
	endif ()