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CMakeLists.txt
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# Copyright (c) 2006, 2020, Oracle and/or its affiliates.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2.0,
# as published by the Free Software Foundation.
#
# This program is also distributed with certain software (including
# but not limited to OpenSSL) that is licensed under separate terms,
# as designated in a particular file or component or in included license
# documentation. The authors of MySQL hereby grant you an additional
# permission to link the program and your derivative works with the
# separately licensed software that they have included with MySQL.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License, version 2.0, for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
MESSAGE(STATUS "Running cmake version ${CMAKE_VERSION}")
IF(WIN32)
# CMake 3.8.0 is needed for Visual Studio 2017 and x64 toolset.
CMAKE_MINIMUM_REQUIRED(VERSION 3.8.0)
EXECUTE_PROCESS(COMMAND wmic os get version
OUTPUT_VARIABLE NT_RELEASE_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE WMIC_RESULT
)
IF(WMIC_RESULT EQUAL 0)
STRING(REPLACE "\r" "" NT_RELEASE_VERSION "${NT_RELEASE_VERSION}")
STRING(REPLACE "\n" "" NT_RELEASE_VERSION "${NT_RELEASE_VERSION}")
STRING(REGEX MATCH "Version[ ]+([0-9\.]+)" V_NUM "${NT_RELEASE_VERSION}")
MESSAGE(STATUS "NT_RELEASE_VERSION is ${NT_RELEASE_VERSION}")
IF(CMAKE_MATCH_1)
IF(CMAKE_MATCH_1 VERSION_LESS "10")
MESSAGE(FATAL_ERROR
"Need at least Windows Server 2016, or Windows 10, to build")
ENDIF()
ENDIF()
ENDIF()
IF(CMAKE_GENERATOR MATCHES "Visual Studio" AND CMAKE_GENERATOR MATCHES "2019")
IF(CMAKE_VERSION MATCHES "MSVC")
# It is the bundled version, ignore version check,
# (although this seems to be buggy too).
ELSE()
# Bug in msbuild, install the latest in the 3.15 series as a workaround.
# https://gitlab.kitware.com/cmake/cmake/issues/19303
# custom commands are re-built every time
CMAKE_MINIMUM_REQUIRED(VERSION 3.15.3)
ENDIF()
ENDIF()
ELSEIF(APPLE)
# Version 3.12.4 is needed because the new build system of Xcode is not
# supported by cmake. 3.12.4 will force using the legacy build system.
# Version 3.9.2 is needed because INCLUDE_DIRECTORIES(SYSTEM ...) wasn't
# handled properly by the cmake Xcode generator.
IF(CMAKE_GENERATOR STREQUAL "Xcode")
CMAKE_MINIMUM_REQUIRED(VERSION 3.12.4)
ELSE()
CMAKE_MINIMUM_REQUIRED(VERSION 3.9.2)
ENDIF()
# If this is macOS 11, we need cmake 3.18
# System libraries like
# /usr/lib/libresolv.dylib
# are no longer present in the file system.
# cmake >= 3.18 will look for .tbd files in the SDK instead
# So we end up linking with:
# /Applications/Xcode.app/.../usr/lib/libresolv.tbd
# We must postpone the version test until we have called 'uname -r' below.
ELSEIF(UNIX)
# This is currently minimum version on all supported platforms.
IF(CMAKE_VERSION VERSION_LESS 3.5.1)
# Default cmake is 2.8.12.2 on RedHat
IF(EXISTS "/etc/redhat-release")
MESSAGE(WARNING "Please use cmake3 rather than cmake on this platform")
FIND_PROGRAM(MY_CMAKE3 cmake3 /bin /usr/bin /usr/local/bin)
IF(MY_CMAKE3)
MESSAGE(STATUS "Found ${MY_CMAKE3}")
ELSE()
MESSAGE(STATUS "Please install cmake3 (yum install cmake3)")
ENDIF()
ELSE()
# On SunOS /opt/csw/bin/cmake is (most likely) too old.
FIND_PROGRAM(MY_UNAME uname /bin /usr/bin /usr/local/bin /sbin)
IF(MY_UNAME)
EXEC_PROGRAM(uname ARGS -s OUTPUT_VARIABLE MY_HOST_SYSTEM_NAME)
IF(MY_HOST_SYSTEM_NAME MATCHES "SunOS")
FIND_PROGRAM(MY_CMAKE cmake /usr/bin
NO_CMAKE_ENVIRONMENT_PATH
NO_SYSTEM_ENVIRONMENT_PATH
)
IF(MY_CMAKE)
MESSAGE(STATUS "Found ${MY_CMAKE}")
EXEC_PROGRAM(${MY_CMAKE} ARGS --version)
ELSE()
MESSAGE(STATUS "Please install /usr/bin/cmake ")
ENDIF()
ENDIF()
ENDIF()
ENDIF()
ENDIF()
ENDIF()
# CMake 3.5 is needed for TARGET_SOURCES(... $<TARGET_OBJECTS:${LIB}_objlib>)
CMAKE_MINIMUM_REQUIRED(VERSION 3.5.1)
# Explicitly set CMP0018 and CMP0022 = NEW since newer versions of
# CMake has OLD as default even if OLD is deprecated.
# See cmake --help-policy CMP0018 / CMP0022
CMAKE_POLICY(SET CMP0018 NEW)
CMAKE_POLICY(SET CMP0022 NEW)
# Include TARGET_OBJECTS expressions.
CMAKE_POLICY(SET CMP0051 NEW)
# Disallow use of the LOCATION property for build targets.
IF(POLICY CMP0026)
CMAKE_POLICY(SET CMP0026 NEW)
ENDIF()
# INTERPROCEDURAL_OPTIMIZATION is enforced when enabled (CMake 3.9+)
IF(POLICY CMP0069)
CMAKE_POLICY(SET CMP0069 NEW)
ENDIF()
# In CMake 3.12 and above, the
#
# * ``check_include_file`` macro in the ``CheckIncludeFile`` module, the
# * ``check_include_file_cxx`` macro in the
# ``CheckIncludeFileCXX`` module, and the
# * ``check_include_files`` macro in the ``CheckIncludeFiles`` module
#
# now prefer to link the check executable to the libraries listed in the
# ``CMAKE_REQUIRED_LIBRARIES`` variable.
IF(POLICY CMP0075)
CMAKE_POLICY(SET CMP0075 OLD)
ENDIF()
# Will set GIT_EXECUTABLE and GIT_FOUND
FIND_PACKAGE(Git)
SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake)
# First, decide about build type (debug or release)
# If cmake is invoked with -DCMAKE_BUILD_TYPE,
# respect user wishes and do not (re)define CMAKE_BUILD_TYPE. If WITH_DEBUG
# is given, set CMAKE_BUILD_TYPE = Debug. Otherwise, use Relwithdebinfo.
IF(DEFINED CMAKE_BUILD_TYPE)
SET(HAVE_CMAKE_BUILD_TYPE TRUE)
ENDIF()
OPTION(WITH_DEBUG "Use dbug/safemutex" OFF)
OPTION(CHECK_ERRMSG_FORMAT "Check printf format for English error messages" OFF)
# Use a default manufacturer if no manufacturer was identified.
SET(MANUFACTURER_DOCSTRING
"Set the entity that appears as the manufacturer of packages that support a manufacturer field.")
IF(NOT DEFINED MANUFACTURER)
SET(MANUFACTURER "Built from Source" CACHE STRING ${MANUFACTURER_DOCSTRING})
MARK_AS_ADVANCED(MANUFACTURER)
ENDIF()
#Caching for BUILD TESTING
SET(BUILD_TESTING OFF CACHE BOOL "")
# MAX_INDEXES - Set the maximum number of indexes per table, default 64U
IF (NOT MAX_INDEXES)
SET(MAX_INDEXES 64U)
ELSEIF(MAX_INDEXES MATCHES "^[0-9]+[Uu]?$")
# MAX_INDEXES should be unsigned, so add the U suffix if it's missing.
STRING(REGEX REPLACE "^([0-9]+).*$" "\\1U" MAX_INDEXES "${MAX_INDEXES}")
MESSAGE(STATUS "Configuring with MAX_INDEXES = ${MAX_INDEXES}")
ELSE()
MESSAGE(FATAL_ERROR "MAX_INDEXES should be an unsigned integer.")
ENDIF(NOT MAX_INDEXES)
IF(MAX_INDEXES GREATER 255)
MESSAGE(FATAL_ERROR "MAX_INDEXES values greater than 255 is not supported!")
ELSEIF(MAX_INDEXES LESS 64)
# Per documentation, ignore values less than 64 and use the default instead.
MESSAGE(WARNING "MAX_INDEXES option ignored because it is less than 64.")
SET(MAX_INDEXES 64U)
ENDIF()
# PAM build Handling
OPTION(WITH_PAM "Build with Percona PAM plugin" OFF)
# We choose to provide WITH_DEBUG as alias to standard CMAKE_BUILD_TYPE=Debug
# which turns out to be not trivial, as this involves synchronization
# between CMAKE_BUILD_TYPE and WITH_DEBUG. Besides, we have to deal with cases
# where WITH_DEBUG is reset from ON to OFF and here we need to reset
# CMAKE_BUILD_TYPE to either none or default RelWithDebInfo
SET(BUILDTYPE_DOCSTRING
"Choose the type of build, options are: None(CMAKE_CXX_FLAGS or
CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel")
IF(WITH_DEBUG)
SET(CMAKE_BUILD_TYPE "Debug" CACHE STRING ${BUILDTYPE_DOCSTRING} FORCE)
SET(OLD_WITH_DEBUG 1 CACHE INTERNAL "" FORCE)
ELSEIF(NOT HAVE_CMAKE_BUILD_TYPE OR OLD_WITH_DEBUG)
IF(CMAKE_BUILD_TYPE MATCHES "Debug" OR NOT HAVE_CMAKE_BUILD_TYPE)
SET(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING
${BUILDTYPE_DOCSTRING} FORCE)
ENDIF()
SET(OLD_WITH_DEBUG 0 CACHE INTERNAL "" FORCE)
ENDIF()
STRING(TOUPPER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE_UPPER)
IF(CMAKE_GENERATOR MATCHES "Visual Studio [1-9][0-9].*" AND
CMAKE_GENERATOR_TOOLSET STREQUAL "")
# Switch to 64 bit toolset on Windows (32 bit is default).
# This is recommended as the 32 bit linker will run into address space issues
# and not exit for long time.
SET(CMAKE_GENERATOR_TOOLSET "host=x64")
ENDIF()
# On Linux el6/el7 the default gcc is too old, see if devtoolset is installed.
# Same with SLES 12, look for gcc 7 there.
# We need to look for gcc before calling PROJECT below.
OPTION(FORCE_UNSUPPORTED_COMPILER "Disable compiler version checks" OFF)
MARK_AS_ADVANCED(WITHOUT_SERVER FORCE_UNSUPPORTED_COMPILER)
# Use 'uname -r' and 'rpm -qf /' to figure out host system.
# For Docker images we cannot trust uname, so use rpm instead.
IF(UNIX)
FIND_PROGRAM(MY_UNAME uname /bin /usr/bin /usr/local/bin /sbin)
IF(MY_UNAME)
EXECUTE_PROCESS(COMMAND ${MY_UNAME} -s
OUTPUT_VARIABLE MY_HOST_SYSTEM_NAME
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE MY_UNAME_RESULT
)
EXEC_PROGRAM(${MY_UNAME} ARGS -r OUTPUT_VARIABLE MY_HOST_SYSTEM_VERSION)
ENDIF()
FIND_PROGRAM(MY_RPM rpm /bin /usr/bin)
IF(MY_RPM)
EXECUTE_PROCESS(COMMAND ${MY_RPM} -qf /
OUTPUT_VARIABLE MY_HOST_FILESYSTEM_NAME
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE MY_RPM_RESULT
)
ENDIF()
ENDIF()
# See comments above, about CMAKE_MINIMUM_REQUIRED VERSION and macOS 11.
IF(APPLE)
IF(MY_HOST_SYSTEM_VERSION VERSION_GREATER_EQUAL 20)
CMAKE_MINIMUM_REQUIRED(VERSION 3.18)
ENDIF()
ENDIF()
IF(CMAKE_HOST_UNIX AND NOT FORCE_UNSUPPORTED_COMPILER
AND NOT CMAKE_C_COMPILER AND NOT CMAKE_CXX_COMPILER)
# Cannot INCLUDE(CMakeDetermineSystem) prior to PROJECT initialization below.
SET (ENV_CC "$ENV{CC}")
SET (ENV_CXX "$ENV{CXX}")
IF (ENV_CC STREQUAL "" AND ENV_CXX STREQUAL "")
IF(MY_UNAME)
IF(MY_HOST_SYSTEM_NAME MATCHES "Linux" AND
(MY_HOST_SYSTEM_VERSION MATCHES "\\.el[678](uek)?\\.")
OR
(MY_HOST_FILESYSTEM_NAME MATCHES "\\.el[678]\\."))
MESSAGE(STATUS
"This is el6, el7 or el8 as found from 'uname -r' or 'rpm -qf /'")
MESSAGE(STATUS "We probably need some devtoolset compiler")
# el6 /opt/rh/devtoolset-8/root/usr/bin/gcc
# el7 /opt/rh/devtoolset-9/root/usr/bin/gcc
# el8 /opt/rh/gcc-toolset-9/root/usr/bin/gcc
SET(ALTERNATIVE_PATHS
"/opt/rh/devtoolset-9"
"/opt/rh/gcc-toolset-9"
"/opt/rh/devtoolset-8"
)
FOREACH(OPT_PATH ${ALTERNATIVE_PATHS})
FIND_PROGRAM(ALTERNATIVE_GCC gcc
NO_DEFAULT_PATH
PATHS "${OPT_PATH}/root/usr/bin")
FIND_PROGRAM(ALTERNATIVE_GPP g++
NO_DEFAULT_PATH
PATHS "${OPT_PATH}/root/usr/bin")
FIND_PROGRAM(ALTERNATIVE_ENABLE enable
NO_DEFAULT_PATH
PATHS "${OPT_PATH}")
ENDFOREACH()
IF(ALTERNATIVE_GCC AND ALTERNATIVE_GPP)
SET(CMAKE_C_COMPILER ${ALTERNATIVE_GCC})
SET(CMAKE_CXX_COMPILER ${ALTERNATIVE_GPP})
MESSAGE(STATUS "Using ${ALTERNATIVE_GCC}")
MESSAGE(STATUS "Using ${ALTERNATIVE_GPP}")
ELSE()
MESSAGE(WARNING "Could not find devtoolset gcc")
ENDIF()
ELSEIF(MY_HOST_SYSTEM_NAME MATCHES "Linux" AND
EXISTS "/etc/os-release")
FILE(READ "/etc/os-release" MY_OS_RELEASE)
IF (MY_OS_RELEASE MATCHES "SUSE Linux Enterprise Server 12")
MESSAGE(STATUS "We need to look for a newer GCC on SLES 12")
FIND_PROGRAM(ALTERNATIVE_GCC gcc-7
NO_DEFAULT_PATH
PATHS "/usr/bin")
FIND_PROGRAM(ALTERNATIVE_GPP g++-7
NO_DEFAULT_PATH
PATHS "/usr/bin")
IF (ALTERNATIVE_GCC AND ALTERNATIVE_GPP)
SET(CMAKE_C_COMPILER ${ALTERNATIVE_GCC})
SET(CMAKE_CXX_COMPILER ${ALTERNATIVE_GPP})
MESSAGE(STATUS "Using ${ALTERNATIVE_GCC}")
MESSAGE(STATUS "Using ${ALTERNATIVE_GPP}")
# Use the new ABI so that std::string can be used with allocators
# that are not default-constructible (e.g. Memroot_allocator)
ADD_DEFINITIONS(-D_GLIBCXX_USE_CXX11_ABI=1)
ELSE()
MESSAGE(WARNING "Could not find newer gcc")
ENDIF()
ENDIF()
ENDIF()
ENDIF()
ENDIF()
ENDIF()
# Optionally set project name, e.g.
# foo.xcodeproj (mac) or foo.sln (windows)
SET(MYSQL_PROJECT_NAME_DOCSTRING "MySQL project name")
IF(DEFINED MYSQL_PROJECT_NAME)
SET(MYSQL_PROJECT_NAME ${MYSQL_PROJECT_NAME} CACHE STRING
${MYSQL_PROJECT_NAME_DOCSTRING} FORCE)
ELSE()
SET(MYSQL_PROJECT_NAME "MySQL" CACHE STRING
${MYSQL_PROJECT_NAME_DOCSTRING} FORCE)
MARK_AS_ADVANCED(MYSQL_PROJECT_NAME)
ENDIF()
# Remember if WITH_NDBCLUSTER was specified by user
IF(DEFINED WITH_NDBCLUSTER)
SET(HAVE_WITH_NDBCLUSTER 1)
ENDIF()
OPTION(WITH_NDBCLUSTER "Build MySQL Cluster" OFF)
OPTION(WITH_NDBCLUSTER_STORAGE_ENGINE
"Legacy and deprecated alias for WITH_NDBCLUSTER" OFF)
OPTION(WITH_PLUGIN_NDBCLUSTER
"Legacy and deprecated alias for WITH_NDBCLUSTER" OFF)
MARK_AS_ADVANCED(WITH_NDBCLUSTER_STORAGE_ENGINE WITH_PLUGIN_NDBCLUSTER)
IF(NOT HAVE_WITH_NDBCLUSTER)
# Unless user has used WITH_NDBCLUSTER also look at
# some of the legacy variables
IF(WITH_PLUGIN_NDBCLUSTER)
MESSAGE(WARNING "WITH_PLUGIN_NDBCLUSTER is deprecated and will be "
"removed in a future release. Please use WITH_NDBCLUSTER instead.")
SET(WITH_NDBCLUSTER ON)
ENDIF()
IF(WITH_NDBCLUSTER_STORAGE_ENGINE)
MESSAGE(WARNING "WITH_NDBCLUSTER_STORAGE_ENGINE is deprecated and "
"will be removed in a future release. Please use WITH_NDBCLUSTER "
"instead.")
SET(WITH_NDBCLUSTER ON)
ENDIF()
ENDIF()
IF(WITH_NDBCLUSTER)
MESSAGE(STATUS "Building MySQL Cluster")
ENDIF()
INCLUDE(mysql_version)
IF(POLICY CMP0048)
CMAKE_POLICY(SET CMP0048 NEW)
PROJECT(${MYSQL_PROJECT_NAME}
VERSION ${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION})
ELSE()
PROJECT(${MYSQL_PROJECT_NAME})
ENDIF()
GET_FILENAME_COMPONENT(REALPATH_CMAKE_SOURCE_DIR ${CMAKE_SOURCE_DIR} REALPATH)
GET_FILENAME_COMPONENT(REALPATH_CMAKE_BINARY_DIR ${CMAKE_BINARY_DIR} REALPATH)
MESSAGE(STATUS "Source directory ${REALPATH_CMAKE_SOURCE_DIR}")
MESSAGE(STATUS "Binary directory ${REALPATH_CMAKE_BINARY_DIR}")
# IN PB2 we have a few configurations which are built in-source (e.g. doxygen).
IF(DEFINED ENV{PB2WORKDIR})
OPTION(FORCE_INSOURCE_BUILD "Allow in-source build" ON)
ELSE()
OPTION(FORCE_INSOURCE_BUILD "Allow in-source build" OFF)
ENDIF()
# https://gitlab.kitware.com/cmake/community/wikis/FAQ
# cmake-does-not-generate-a-make-distclean-target-why
# Why disallow in-source build?
# Basically because 'make clean' or 'make distclean' do not work.
# So if you do a 'git pull' you may end up with a developer sandbox
# that no longer works as expected (CMakeCache.txt and other
# generated/configured files may contain data which is no longer valid)
IF(${REALPATH_CMAKE_SOURCE_DIR} STREQUAL ${REALPATH_CMAKE_BINARY_DIR})
IF(FORCE_INSOURCE_BUILD)
MESSAGE(WARNING "This is an in-source build")
ELSE()
MESSAGE(FATAL_ERROR
"Please do not build in-source. "
"Out-of source builds are highly recommended: "
"you can have multiple builds for the same source, "
"and there is an easy way to do cleanup, "
"simply remove the build directory "
"(note that 'make clean' or 'make distclean' does *not* work) "
"\nYou *can* force in-source build by invoking cmake with -DFORCE_INSOURCE_BUILD=1")
ENDIF()
ENDIF()
IF(WIN32)
STRING(LENGTH "${REALPATH_CMAKE_BINARY_DIR}" CMAKE_BINARY_DIR_LENGTH)
IF(CMAKE_BINARY_DIR_LENGTH LESS_EQUAL 3)
MESSAGE(FATAL_ERROR
"It seems your build directory ${CMAKE_BINARY_DIR} is a filesystem root, "
"this is not supported. Please build in a subdirectory.")
ENDIF()
ENDIF()
MACRO(REPORT_CXX_FLAGS)
MESSAGE(STATUS "CMAKE_C_FLAGS: ${CMAKE_C_FLAGS}")
FOREACH(BUILD_TYPE "" _DEBUG _RELWITHDEBINFO _RELEASE _MINSIZEREL)
SET(flag "CMAKE_CXX_FLAGS${BUILD_TYPE}")
MESSAGE(STATUS "${flag}: ${${flag}}")
ENDFOREACH()
ENDMACRO()
# STRING(APPEND ...) from cmake VERSION 3.4
MACRO(STRING_APPEND STRING_VAR INPUT)
SET(${STRING_VAR} "${${STRING_VAR}}${INPUT}")
ENDMACRO()
MACRO(STRING_PREPEND STRING_VAR INPUT)
SET(${STRING_VAR} "${INPUT}${${STRING_VAR}}")
ENDMACRO()
# Write content to file, using CONFIGURE_FILE
# The advantage compared to FILE(WRITE) is that timestamp
# does not change if file already has the same content
SET(MYSQL_CMAKE_SCRIPT_DIR "${CMAKE_SOURCE_DIR}/cmake")
MACRO(CONFIGURE_FILE_CONTENT content file)
SET(CMAKE_CONFIGURABLE_FILE_CONTENT
"${content}\n")
CONFIGURE_FILE(
${MYSQL_CMAKE_SCRIPT_DIR}/configurable_file_content.in
${file}
@ONLY)
ENDMACRO()
SET(BUILD_IS_SINGLE_CONFIG TRUE)
MESSAGE(STATUS "CMAKE_GENERATOR: ${CMAKE_GENERATOR}")
IF(CMAKE_GENERATOR MATCHES "Visual Studio" OR CMAKE_GENERATOR STREQUAL "Xcode")
SET(BUILD_IS_SINGLE_CONFIG FALSE)
ENDIF()
IF(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
SET(MY_COMPILER_IS_CLANG 1)
ELSEIF(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
SET(MY_COMPILER_IS_GNU 1)
ELSEIF(CMAKE_CXX_COMPILER_ID MATCHES "SunPro")
SET(MY_COMPILER_IS_SUNPRO 1)
ENDIF()
IF(MY_COMPILER_IS_CLANG OR MY_COMPILER_IS_GNU)
SET(MY_COMPILER_IS_GNU_OR_CLANG 1)
ENDIF()
# Maintainer mode is default on only for debug builds using GCC/G++
IF(CMAKE_BUILD_TYPE_UPPER STREQUAL "DEBUG" OR WITH_DEBUG)
IF(MY_COMPILER_IS_GNU)
SET(MYSQL_MAINTAINER_MODE ON CACHE BOOL
"MySQL maintainer-specific development environment")
ENDIF()
ENDIF()
OPTION(WITH_DEFAULT_COMPILER_OPTIONS
"Use flags from cmake/build_configurations/compiler_options.cmake"
ON)
IF(BUILD_CONFIG)
INCLUDE(
${CMAKE_SOURCE_DIR}/cmake/build_configurations/${BUILD_CONFIG}.cmake)
ENDIF()
OPTION(INSTALL_STATIC_LIBRARIES "Install static libraries" ON)
#cmake on 64bit windows/mac/solaris doesn't set CMAKE_SYSTEM_PROCESSOR correctly
SET(MYSQL_MACHINE_TYPE ${CMAKE_SYSTEM_PROCESSOR})
SET(KNOWN_64BIT_ARCHITECTURES
aarch64
ppc64
ppc64le
s390x
x86_64
)
# Include the platform-specific file. To allow exceptions, this code
# looks for files in order of how specific they are. If there is, for
# example, a generic Linux.cmake and a version-specific
# Linux-2.6.28-11-generic, it will pick Linux-2.6.28-11-generic and
# include it. It is then up to the file writer to include the generic
# version if necessary.
FOREACH(_base
${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_VERSION}-${CMAKE_SYSTEM_PROCESSOR}
${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_VERSION}
${CMAKE_SYSTEM_NAME})
SET(_file ${CMAKE_SOURCE_DIR}/cmake/os/${_base}.cmake)
IF(EXISTS ${_file})
INCLUDE(${_file})
BREAK()
ENDIF()
ENDFOREACH()
IF(UNIX)
OPTION(WITH_INNODB_MEMCACHED "" OFF)
OPTION(ENABLE_MEMCACHED_SASL "Enable SASL on InnoDB Memcached" OFF)
OPTION(ENABLE_MEMCACHED_SASL_PWDB "Enable SASL on InnoDB Memcached" OFF)
ELSE()
OPTION(WITH_INNODB_MEMCACHED "" OFF)
ENDIF()
# Following autotools tradition, add preprocessor definitions
# specified in environment variable CPPFLAGS
IF(DEFINED ENV{CPPFLAGS})
ADD_DEFINITIONS($ENV{CPPFLAGS})
ENDIF()
INCLUDE(CheckTypeSize)
CHECK_TYPE_SIZE("void *" SIZEOF_VOIDP)
MESSAGE(STATUS "SIZEOF_VOIDP ${SIZEOF_VOIDP}")
# On some platforms, cmake may think that CMAKE_SIZEOF_VOID_P == 4
# even if we have configured for 64bit build....
SET(CMAKE_SIZEOF_VOID_P ${SIZEOF_VOIDP})
IF(WITH_DEFAULT_COMPILER_OPTIONS)
INCLUDE(${CMAKE_SOURCE_DIR}/cmake/build_configurations/compiler_options.cmake)
ENDIF()
INCLUDE(CMakePushCheckState)
# Add macros
INCLUDE(pkg-config)
INCLUDE(character_sets)
INCLUDE(cmake_parse_arguments)
INCLUDE(compile_flags)
INCLUDE(link_options)
INCLUDE(malloc_utils)
INCLUDE(cpu_info)
INCLUDE(fileutils)
INCLUDE(zlib)
INCLUDE(zstd)
INCLUDE(lz4)
INCLUDE(icu)
INCLUDE(libevent)
INCLUDE(ssl)
INCLUDE(sasl)
INCLUDE(ldap)
INCLUDE(kerberos)
INCLUDE(rpc)
INCLUDE(readline)
INCLUDE(protobuf)
INCLUDE(package_name)
INCLUDE(libutils)
INCLUDE(plugin)
INCLUDE(component)
INCLUDE(install_macros)
INCLUDE(install_layout)
INCLUDE(mysql_add_executable)
INCLUDE(curl)
INCLUDE(coredumper)
INCLUDE(prepend_append_cflags_if_supported)
INCLUDE(rapidjson)
INCLUDE(fprofile)
IF(UNIX)
OPTION(WITH_VALGRIND "Valgrind instrumentation" OFF)
ENDIF()
OPTION(WITH_TCMALLOC "Use tcmalloc rather than builtin malloc/free etc." OFF)
OPTION(WITH_TCMALLOC_DEBUG
"Use tcmalloc_debug rather than builtin malloc/free etc." OFF)
IF(WITH_TCMALLOC OR WITH_TCMALLOC_DEBUG)
# Note that libtcmalloc.so reports lots of Mismatched free()/delete/delete[]
# So for valgrind builds, link with libtcmalloc_debug.so
IF(WITH_VALGRIND OR WITH_TCMALLOC_DEBUG)
FIND_MALLOC_LIBRARY(tcmalloc_debug)
ELSE()
FIND_MALLOC_LIBRARY(tcmalloc)
ENDIF()
ENDIF()
OPTION(WITH_JEMALLOC "Use jemalloc rather than builtin malloc/free etc." OFF)
IF(WITH_JEMALLOC)
FIND_MALLOC_LIBRARY(jemalloc)
ENDIF()
IF(WITH_JEMALLOC AND (WITH_TCMALLOC OR WITH_TCMALLOC_DEBUG))
MESSAGE(FATAL_ERROR "Specify only *one* of WITH_TCMALLOC and WITH_JEMALLOC")
ENDIF()
OPTION(ENABLED_PROFILING "Enable profiling" ON)
OPTION(WITHOUT_SERVER OFF)
IF(UNIX)
OPTION(WITH_VALGRIND "Valgrind instrumentation" OFF)
IF (WITH_VALGRIND)
ADD_DEFINITIONS(-DUSE_VALGRIND)
ENDIF()
ENDIF()
IF(WIN32)
OPTION(WITH_MSCRT_DEBUG "MS Visual Studio Debug CRT instrumentation" OFF)
ENDIF()
IF(NOT WITHOUT_SERVER)
OPTION(WITH_UNIT_TESTS "Compile MySQL with unit tests" ON)
OPTION(WITH_ROUTER "Build MySQL Router" ON)
ENDIF()
IF(EXISTS ${CMAKE_SOURCE_DIR}/internal/CMakeLists.txt)
SET(WITH_INTERNAL_DEFAULT 1)
ELSE()
SET(WITH_INTERNAL_DEFAULT 0)
ENDIF()
IF(NOT DEFINED WITH_INTERNAL)
SET(WITH_INTERNAL ${WITH_INTERNAL_DEFAULT})
ENDIF()
# On windows we need a non-standard package for SASL.
IF(WITH_INTERNAL AND (NOT WIN32 OR WITH_SASL))
SET(WITH_AUTHENTICATION_LDAP_DEFAULT ON)
ELSE()
SET(WITH_AUTHENTICATION_LDAP_DEFAULT OFF)
ENDIF()
OPTION(WITH_AUTHENTICATION_LDAP
"Report error if the LDAP authentication plugin cannot be built."
${WITH_AUTHENTICATION_LDAP_DEFAULT})
OPTION(WITH_LOCK_ORDER
"Build the lock order mutex instrumentation code." OFF)
IF(WITH_LOCK_ORDER)
EXECUTE_PROCESS(
COMMAND ${CMAKE_COMMAND} -E make_directory lock_order
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
ENDIF()
IF(DEFINED WITH_LTO_DEFAULT)
SET(WITH_LTO_DEFAULT ${WITH_LTO_DEFAULT})
ELSE()
SET(WITH_LTO_DEFAULT OFF)
ENDIF()
OPTION(WITH_LTO
"Enable the link-time optimizer. Currently works for gcc7/gcc8/gcc9/macos only."
${WITH_LTO_DEFAULT}
)
IF(CMAKE_C_FLAGS MATCHES " -flto" OR CMAKE_CXX_FLAGS MATCHES " -flto")
SET(CMAKE_COMPILER_FLAG_WITH_LTO 1)
ENDIF()
include(CheckCSourceCompiles)
include(CheckCXXSourceCompiles)
# We need some extra FAIL_REGEX patterns
# Note that CHECK_C_SOURCE_COMPILES is a misnomer, it will also link.
MACRO (MY_CHECK_C_COMPILER_FLAG FLAG RESULT)
CMAKE_PUSH_CHECK_STATE()
STRING_APPEND(CMAKE_REQUIRED_FLAGS " ${FLAG}")
CHECK_C_SOURCE_COMPILES("int main(void) { return 0; }" ${RESULT}
FAIL_REGEX "unknown argument ignored"
FAIL_REGEX "argument unused during compilation"
FAIL_REGEX "unsupported .*option"
FAIL_REGEX "unknown .*option"
FAIL_REGEX "unrecognized .*option"
FAIL_REGEX "ignoring unknown option"
FAIL_REGEX "[Ww]arning: [Oo]ption"
FAIL_REGEX "error: visibility"
FAIL_REGEX "warning: visibility"
)
CMAKE_POP_CHECK_STATE()
ENDMACRO()
MACRO (MY_CHECK_CXX_COMPILER_FLAG FLAG RESULT)
CMAKE_PUSH_CHECK_STATE()
STRING_APPEND(CMAKE_REQUIRED_FLAGS " ${FLAG}")
CHECK_CXX_SOURCE_COMPILES("int main(void) { return 0; }" ${RESULT}
FAIL_REGEX "unknown argument ignored"
FAIL_REGEX "argument unused during compilation"
FAIL_REGEX "unsupported .*option"
FAIL_REGEX "unknown .*option"
FAIL_REGEX "unrecognized .*option"
FAIL_REGEX "ignoring unknown option"
FAIL_REGEX "[Ww]arning: [Oo]ption"
FAIL_REGEX "error: visibility"
FAIL_REGEX "warning: visibility"
)
CMAKE_POP_CHECK_STATE()
ENDMACRO()
# Check whether a specific warning option is supported.
# Intended use is primarily to silence warnings from third-party code.
# If *our* code has warnings with gcc[56789] or clang[345678] the
# code should be fixed, rather than silencing the compiler warnings.
#
# Returns the corresponding "-Wno-<option>" if supported, 0 otherwise.
# WARNING_OPTION should be as found in clang/gcc documentation.
# Note: Sun Studio accepts/ignores anything starting with "-W".
# Visual Studio has a few /W options, but are totally different.
# Hence we check for gcc/clang only.
# No return value for functions in cmake, so we use an output argument.
FUNCTION(MY_CHECK_CXX_COMPILER_WARNING WARNING_OPTION RETURN_VALUE)
# Strip off possible leading -Wno- or -W
STRING(REGEX REPLACE "^-Wno-" "" WARNING_OPTION ${WARNING_OPTION})
STRING(REGEX REPLACE "^-W" "" WARNING_OPTION ${WARNING_OPTION})
# Use HAVE_CXX_W_warning_option as cache variable.
STRING(REPLACE "-" "_" VAR_NAME ${WARNING_OPTION})
STRING(REPLACE "=" "_" VAR_NAME ${VAR_NAME})
STRING(REPLACE "c++" "cpp" VAR_NAME ${VAR_NAME})
SET(VAR_NAME "HAVE_CXX_W_${VAR_NAME}")
IF(MY_COMPILER_IS_GNU_OR_CLANG)
MY_CHECK_CXX_COMPILER_FLAG("-W${WARNING_OPTION}" ${VAR_NAME})
ELSE()
SET(${VAR_NAME} 0 CACHE INTERNAL "-W${WARNING_OPTION} not supported")
ENDIF()
IF(${VAR_NAME})
SET(${RETURN_VALUE} "-Wno-${WARNING_OPTION}" PARENT_SCOPE)
ELSE()
SET(${RETURN_VALUE} 0 PARENT_SCOPE)
ENDIF()
ENDFUNCTION()
MACRO(MY_SANITIZER_CHECK SAN_OPT ADD_OPTIMIZATION RESULT)
MY_CHECK_C_COMPILER_FLAG("${SAN_OPT}" C_RESULT)
MY_CHECK_CXX_COMPILER_FLAG("${SAN_OPT}" CXX_RESULT)
IF(C_RESULT AND CXX_RESULT)
STRING_APPEND(CMAKE_C_FLAGS " ${SAN_OPT}")
STRING_APPEND(CMAKE_CXX_FLAGS " ${SAN_OPT}")
# We switch on basic optimization also for debug builds.
# We disable inlining for stack trace readability.
# With optimization we may get some warnings, so we switch off -Werror
IF(${ADD_OPTIMIZATION})
IF(MSVC)
STRING_APPEND(CMAKE_C_FLAGS " -O1 /Ob0")
STRING_APPEND(CMAKE_CXX_FLAGS " -O1 /Ob0")
ELSE()
STRING_APPEND(CMAKE_C_FLAGS " -O1 -fno-inline")
STRING_APPEND(CMAKE_CXX_FLAGS " -O1 -fno-inline")
ENDIF()
IF(NOT SANITIZE_MAINTAINER_MODE)
SET(MYSQL_MAINTAINER_MODE OFF CACHE BOOL
"MySQL maintainer-specific development environment" FORCE)
ENDIF()
ENDIF()
SET(${RESULT} 1)
ELSE()
SET(${RESULT} 0)
ENDIF()
ENDMACRO()
OPTION(WITH_ASAN "Enable address sanitizer" OFF)
IF(WITH_ASAN)
IF(WIN32_CLANG)
# NOTE: We do _not_ modify CMAKE_C_FLAGS / CMAKE_CXX_FLAGS to add
# -fsanitize=address here yet; Clang (at least of 5.0.0) requires /MT,
# but CMake adds /MDd to all feature checks almost no matter what we do.
# For the same reason, we have to enable it unconditionalyl without
# doing a feature test; we know it's working. Modifying the flags happens
# below, near the end.
SET(HAVE_ASAN 1)
# Get the path to the ASAN support libraries.
GET_FILENAME_COMPONENT(ASAN_LIB_DIR ${CMAKE_CXX_COMPILER} DIRECTORY)
SET(ASAN_LIB_DIR "${ASAN_LIB_DIR}/../lib/clang/${CMAKE_CXX_COMPILER_VERSION}/lib/windows")
GET_FILENAME_COMPONENT(ASAN_LIB_DIR ${ASAN_LIB_DIR} REALPATH)
ELSE()
MY_SANITIZER_CHECK("-fsanitize=address" TRUE WITH_ASAN_OK)
IF(WITH_ASAN_OK)
OPTION(WITH_ASAN_SCOPE "Enable -fsanitize-address-use-after-scope" ON)
SET(HAVE_ASAN 1)
# This works with clang, but not gcc it seems.
MY_CHECK_CXX_COMPILER_FLAG(
"-fsanitize=address -fsanitize-address-use-after-scope"
HAVE_SANITIZE_SCOPE)
IF(WITH_ASAN_SCOPE AND HAVE_SANITIZE_SCOPE)
STRING_APPEND(CMAKE_C_FLAGS " -fsanitize-address-use-after-scope")
STRING_APPEND(CMAKE_CXX_FLAGS " -fsanitize-address-use-after-scope")
ENDIF()
ELSE()
MESSAGE(FATAL_ERROR "Do not know how to enable address sanitizer")
ENDIF()
ENDIF()
ENDIF()
OPTION(WITH_LSAN "Enable leak sanitizer" OFF)
IF(WITH_LSAN)
MY_SANITIZER_CHECK("-fsanitize=leak"
TRUE WITH_LSAN_OK)
IF(NOT WITH_LSAN_OK)
MESSAGE(FATAL_ERROR "Do not know how to enable leak sanitizer")
ELSE()
SET(HAVE_LSAN 1)
ENDIF()
ENDIF()
OPTION(WITH_MSAN "Enable memory sanitizer" OFF)
IF(WITH_MSAN)
MY_SANITIZER_CHECK("-fsanitize=memory -fsanitize-memory-track-origins -fsanitize-blacklist=${CMAKE_CURRENT_SOURCE_DIR}/cmake/msan-blacklist.txt"
TRUE WITH_MSAN_OK)
IF(NOT WITH_MSAN_OK)
MESSAGE(FATAL_ERROR "Do not know how to enable memory sanitizer")
ELSE()
MESSAGE(WARNING "Memory sanitizer support is currently experimental.")
ENDIF()
ENDIF()
OPTION(WITH_UBSAN "Enable undefined behavior sanitizer" OFF)
IF(WITH_UBSAN)
MY_SANITIZER_CHECK("-fsanitize=undefined" TRUE WITH_UBSAN_OK)
IF(NOT WITH_UBSAN_OK)
MESSAGE(FATAL_ERROR
"Do not know how to enable undefined behavior sanitizer")
ELSE()
SET(HAVE_UBSAN 1)
ENDIF()
ENDIF()
OPTION(WITH_TSAN "Enable thread sanitizer" OFF)
IF(WITH_TSAN)
MY_SANITIZER_CHECK("-fsanitize=thread" TRUE WITH_TSAN_OK)
IF(NOT WITH_TSAN_OK)
MESSAGE(FATAL_ERROR "Do not know how to enable thread sanitizer")
ELSE()
MESSAGE(WARNING "Thread sanitizer support is currently experimental.")
SET(HAVE_TSAN 1)
ENDIF()
ENDIF()
IF(WITH_ASAN AND WITH_MSAN)
MESSAGE(FATAL_ERROR
"Cannot use AddressSanitizer and MemorySanitizer together")
ENDIF()
IF(WITH_ASAN OR WITH_LSAN OR WITH_UBSAN)
SET(HANDLE_FATAL_SIGNALS_DEFAULT 0)
ELSE()
SET(HANDLE_FATAL_SIGNALS_DEFAULT 1)
ENDIF()
OPTION(HANDLE_FATAL_SIGNALS
"Handle fatal signals with internal signal handler"
${HANDLE_FATAL_SIGNALS_DEFAULT})
# Older versions of ccache must be disabled: export CCACHE_DISABLE=1
# See http://www.cmake.org/Wiki/CTest/Coverage
OPTION(ENABLE_GCOV "Enable gcov (debug, Linux builds only)" OFF)
IF (ENABLE_GCOV AND NOT WIN32 AND NOT APPLE)
STRING_APPEND(CMAKE_C_FLAGS " -fprofile-arcs -ftest-coverage -DHAVE_GCOV")
STRING_APPEND(CMAKE_CXX_FLAGS " -fprofile-arcs -ftest-coverage -DHAVE_GCOV")
STRING_APPEND(CMAKE_EXE_LINKER_FLAGS " -fprofile-arcs -ftest-coverage -lgcov")
ENDIF()
OPTION(ENABLE_GPROF "Enable gprof (optimized, Linux builds only)" OFF)
IF (ENABLE_GPROF AND NOT WIN32 AND NOT APPLE)
STRING_APPEND(CMAKE_C_FLAGS " -pg")
STRING_APPEND(CMAKE_CXX_FLAGS " -pg")
STRING_APPEND(CMAKE_EXE_LINKER_FLAGS " -pg")
ENDIF()
# Use lld for Clang if available and not explicitly disabled.
# Also works for gcc on Debian/Ubuntu. Do 'apt install lld'.
# LTO build fails with lld, so turn it off by default.
IF(LINUX AND NOT WITH_LTO AND NOT CMAKE_COMPILER_FLAG_WITH_LTO)
OPTION(USE_LD_LLD "Use llvm lld linker" ON)
ELSE()
OPTION(USE_LD_LLD "Use llvm lld linker" OFF)
ENDIF()
IF(USE_LD_LLD)
CMAKE_PUSH_CHECK_STATE(RESET)
# RPM builds on Fedora use -specs files.
# This may cause the test for -fuse-ld=lld to succeed, when it should fail.
SET(SAVE_CMAKE_C_FLAGS ${CMAKE_C_FLAGS})
SET(SAVE_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
STRING(REGEX REPLACE "-specs=/usr/lib/rpm/redhat/.*" ""
CMAKE_C_FLAGS ${CMAKE_C_FLAGS})
STRING(REGEX REPLACE "-specs=/usr/lib/rpm/redhat/.*" ""
CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
SET(CMAKE_REQUIRED_LIBRARIES "-fuse-ld=lld")
CHECK_C_SOURCE_COMPILES("int main() {}" C_LD_LLD_RESULT)
CHECK_CXX_SOURCE_COMPILES("int main() {}" CXX_LD_LLD_RESULT)
IF(C_LD_LLD_RESULT AND CXX_LD_LLD_RESULT)
STRING_APPEND(CMAKE_C_LINK_FLAGS " -fuse-ld=lld")
STRING_APPEND(CMAKE_CXX_LINK_FLAGS " -fuse-ld=lld")
ENDIF()
SET(CMAKE_C_FLAGS ${SAVE_CMAKE_C_FLAGS})
SET(CMAKE_CXX_FLAGS ${SAVE_CMAKE_CXX_FLAGS})
CMAKE_POP_CHECK_STATE()
ENDIF()
# Use gold on x86 if available and not explicitly disabled.
# LTO build fails with gold, so turn it off by default.
IF(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64"
AND NOT WIN32
AND NOT WITH_LTO
AND NOT CMAKE_COMPILER_FLAG_WITH_LTO)
OPTION(USE_LD_GOLD "Use GNU gold linker" ON)
ELSE()
OPTION(USE_LD_GOLD "Use GNU gold linker" OFF)
ENDIF()
IF(LINUX_STANDALONE)
# ON by default in pushbuild, but only for standalone builds.
# The comression does not play well with some RPM/DEB packaging.
# Developers can set default in environment.
# Compressing debug sections will shink binaries significantly, esp
# for RelWithDebInfo builds, at the cost of some extra link time.
IF(DEFINED ENV{PB2WORKDIR} OR
(DEFINED ENV{COMPRESS_DEBUG_SECTIONS} AND "$ENV{COMPRESS_DEBUG_SECTIONS}"
AND NOT DEFINED(COMPRESS_DEBUG_SECTIONS)))
SET(COMPRESS_DEBUG_SECTIONS_DEFAULT ON)
ELSE()
SET(COMPRESS_DEBUG_SECTIONS_DEFAULT OFF)
ENDIF()
OPTION(COMPRESS_DEBUG_SECTIONS
"Compress debug sections of mysqld and test executables"
${COMPRESS_DEBUG_SECTIONS_DEFAULT})
ELSE()
SET(COMPRESS_DEBUG_SECTIONS OFF)
ENDIF()
IF(LINUX)
OPTION(LINK_RANDOMIZE "Randomize the order of all symbols in the binary" OFF)
SET(LINK_RANDOMIZE_SEED "mysql"
CACHE STRING "Seed to use for link randomization")
ELSE()
SET(LINK_RANDOMIZE OFF)
ENDIF()
IF (USE_LD_GOLD AND NOT (C_LD_LLD_RESULT AND CXX_LD_LLD_RESULT))
CMAKE_PUSH_CHECK_STATE(RESET)
SET(CMAKE_REQUIRED_LIBRARIES "-fuse-ld=gold")
CHECK_C_SOURCE_COMPILES("int main() {}" C_LD_GOLD_RESULT)
CHECK_CXX_SOURCE_COMPILES("int main() {}" CXX_LD_GOLD_RESULT)
IF (C_LD_GOLD_RESULT AND CXX_LD_GOLD_RESULT AND NOT SOLARIS)
STRING_APPEND(CMAKE_C_LINK_FLAGS " -fuse-ld=gold")
STRING_APPEND(CMAKE_CXX_LINK_FLAGS " -fuse-ld=gold")
# Seemingly --gc-sections causes problems with randomization, so only
# turn it on if we are not making a randomized build.
IF (NOT LINK_RANDOMIZE)
STRING_APPEND(CMAKE_C_LINK_FLAGS " -Wl,--gc-sections")
STRING_APPEND(CMAKE_CXX_LINK_FLAGS " -Wl,--gc-sections")
ENDIF()
ENDIF()
CMAKE_POP_CHECK_STATE()
ENDIF()
# Linker/binutils bug in Fedora 28, Ubuntu 16.04, Debian 8 and Debian 9,
# undefined reference to symbol '__bss_start'
IF(LINUX_FEDORA_28 OR LINUX_UBUNTU_16_04 OR LINUX_DEBIAN_8 OR LINUX_DEBIAN_9)
IF(NOT CMAKE_CXX_LINK_FLAGS MATCHES "-fuse-ld=lld" AND
NOT CMAKE_CXX_LINK_FLAGS MATCHES "-fuse-ld=gold")
STRING_APPEND(CMAKE_CXX_LINK_FLAGS " -Wl,--copy-dt-needed-entries")
ENDIF()
ENDIF()
IF(LINK_RANDOMIZE)
STRING_APPEND(CMAKE_C_FLAGS " -ffunction-sections -fdata-sections")
STRING_APPEND(CMAKE_CXX_FLAGS " -ffunction-sections -fdata-sections")
SET(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -Wl,--sort-section=name")
SET(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} -Wl,--sort-section=name")
SET(CMAKE_CXX_ARCHIVE_CREATE "sh -c '${CMAKE_SOURCE_DIR}/scripts/randomize-order.pl ${LINK_RANDOMIZE_SEED} <OBJECTS> && <CMAKE_AR> qc <TARGET> <LINK_FLAGS> <OBJECTS>'")
SET(CMAKE_CXX_ARCHIVE_CREATE_APPEND "sh -c '${CMAKE_SOURCE_DIR}/scripts/randomize-order.pl ${LINK_RANDOMIZE_SEED} <OBJECTS> && <CMAKE_AR> q <TARGET> <LINK_FLAGS> <OBJECTS>'")
SET(CMAKE_C_ARCHIVE_CREATE ${CMAKE_CXX_ARCHIVE_CREATE})
SET(CMAKE_C_ARCHIVE_CREATE_APPEND ${CMAKE_CXX_ARCHIVE_CREATE_APPEND})
ENDIF()
# Gold and LLD support the --gdb-index option, which adds a .gdb_index
# section to the binaries. It makes loading the binaries in gdb much
# faster. The overhead of generating the index is small in LLD.
OPTION(ADD_GDB_INDEX "Generate a .gdb_index section in the binaries." OFF)
IF(ADD_GDB_INDEX AND
(CMAKE_CXX_LINK_FLAGS MATCHES "-fuse-ld=lld" OR
CMAKE_CXX_LINK_FLAGS MATCHES "-fuse-ld=gold"))
# -fuse-ld=lld is not enough to ensure that ld.lld will actually be used.
# On some platforms we need an extra check for -Wl,--gdb-index
CMAKE_PUSH_CHECK_STATE()
IF(CMAKE_CXX_LINK_FLAGS MATCHES "-fuse-ld=lld")