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CMakeLists.txt
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CMakeLists.txt
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# Copyright (c) 2006, 2024, 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 designed to work 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 either included with
# the program or referenced in the documentation.
#
# 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 ${CMAKE_VERSION}")
IF(WIN32)
# Load policies. This is needed in order to parse the wmic version check.
CMAKE_MINIMUM_REQUIRED(VERSION 3.5.1)
EXECUTE_PROCESS(COMMAND wmic os get version
OUTPUT_VARIABLE NT_RELEASE_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE WMIC_RESULT
)
IF(WMIC_RESULT EQUAL 0)
STRING(REPLACE "\r" "" NT_RELEASE_VERSION "${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.
# NOTE:
# cmake >= 3.19 will use the new build system by default for Xcode >= 12.x
IF(CMAKE_GENERATOR STREQUAL "Xcode")
SET(APPLE_XCODE 1)
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 3.14.6)
# 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)
EXECUTE_PROCESS(COMMAND uname -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}")
EXECUTE_PROCESS(COMMAND ${MY_CMAKE} --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 3.7 is needeed for VERSION_GREATER_EQUAL
# For the set of currently supported platforms, we can bump up to:
CMAKE_MINIMUM_REQUIRED(VERSION 3.14.6)
# 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 ${MANUFACTURER_DOCSTRING})
MARK_AS_ADVANCED(MANUFACTURER)
ENDIF()
# MAX_INDEXES - Set the maximum number of indexes per table, default 64U
IF (NOT MAX_INDEXES)
SET(MAX_INDEXES 64U)
ELSEIF(MAX_INDEXES MATCHES "^[0-9]+[Uu]?$")
# 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()
# 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 el7/el8/el9 the default gcc is too old,
# see if devtoolset/gcc-toolset is installed.
# Same with SUSE linux 15, look for gcc 12 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
)
EXECUTE_PROCESS(COMMAND ${MY_UNAME} -m
OUTPUT_VARIABLE MY_HOST_MACHINE_NAME
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE MY_UNAME_MACHINE_RESULT
)
EXECUTE_PROCESS(COMMAND ${MY_UNAME} -r
OUTPUT_VARIABLE MY_HOST_SYSTEM_VERSION)
ENDIF()
FIND_PROGRAM(MY_DPKG_BUILDFLAGS dpkg-buildflags /bin /usr/bin)
FIND_PROGRAM(MY_RPM rpm /bin /usr/bin)
IF(MY_RPM)
EXECUTE_PROCESS(COMMAND ${MY_RPM} -qf /
OUTPUT_VARIABLE MY_HOST_FILESYSTEM_NAME
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE MY_RPM_RESULT
)
ENDIF()
ENDIF()
# See comments above, about CMAKE_MINIMUM_REQUIRED VERSION and macOS 11.
IF(APPLE)
IF(MY_HOST_SYSTEM_VERSION VERSION_GREATER_EQUAL 20)
CMAKE_MINIMUM_REQUIRED(VERSION 3.18)
ENDIF()
ENDIF()
# Add all policies *after* CMAKE_MINIMUM_REQUIRED
# Repeating CMAKE_MINIMUM_REQUIRED here will load defaults for 3.5.1
CMAKE_MINIMUM_REQUIRED(VERSION 3.5.1)
INCLUDE(cmake_policies NO_POLICY_SCOPE)
MACRO(STRING_APPEND STRING_VAR INPUT)
SET(${STRING_VAR} "${${STRING_VAR}}${INPUT}")
ENDMACRO()
MACRO(STRING_PREPEND STRING_VAR INPUT)
SET(${STRING_VAR} "${INPUT}${${STRING_VAR}}")
ENDMACRO()
IF(MY_HOST_SYSTEM_NAME MATCHES "SunOS")
SET(SOLARIS 1)
ENDIF()
IF(MY_HOST_SYSTEM_NAME MATCHES "Linux")
# Trust 'rpm -qf /' rather than 'uname -s'
STRING(REGEX MATCH "\\.el([6789])\\." MATCH_FSYS "${MY_HOST_FILESYSTEM_NAME}")
# Set LINUX_RHEL6, LINUX_RHEL7, LINUX_RHEL8 or LINUX_RHEL9
IF(CMAKE_MATCH_1)
SET(LINUX_RHEL 1)
SET(LINUX_RHEL${CMAKE_MATCH_1} 1)
ENDIF()
ENDIF()
IF(NOT LINUX_RHEL AND MY_HOST_SYSTEM_NAME MATCHES "Linux")
IF(EXISTS "/etc/os-release")
FILE(READ "/etc/os-release" MY_OS_RELEASE)
IF(MY_OS_RELEASE MATCHES "Debian")
SET(LINUX_DEBIAN 1)
ELSEIF(MY_OS_RELEASE MATCHES "Ubuntu")
SET(LINUX_UBUNTU 1)
# /etc/os-release contains a line like
# VERSION_ID="20.04"
# Match the numeric value, including the dot, ignore the rest:
STRING(REGEX MATCH
"VERSION_ID=\"([0-9\\.]+).*" UNUSED ${MY_OS_RELEASE})
IF(CMAKE_MATCH_1)
SET(LINUX_UBUNTU_VERSION_ID ${CMAKE_MATCH_1})
ENDIF()
ENDIF()
ENDIF()
ENDIF()
IF(EXISTS "/etc/SuSE-release")
SET(LINUX_SUSE 1)
ENDIF()
IF(LINUX_SUSE)
FILE(READ "/etc/SuSE-release" MY_OS_RELEASE)
IF(MY_OS_RELEASE MATCHES "SUSE Linux Enterprise Server 15" OR
MY_OS_RELEASE MATCHES "openSUSE .* 15")
SET(LINUX_SUSE_15 1)
ELSE()
MESSAGE(WARNING "Unknown SUSE version.")
ENDIF()
ENDIF()
# In case we pick up values form the CACHE or from the command line.
# See invokation of ADD_LINUX_RPM_FLAGS below.
SET(INITIAL_CMAKE_C_FLAGS)
SET(INITIAL_CMAKE_CXX_FLAGS)
IF(DEFINED CMAKE_C_FLAGS)
SET(INITIAL_CMAKE_C_FLAGS ${CMAKE_C_FLAGS})
ENDIF()
IF(DEFINED CMAKE_CXX_FLAGS)
SET(INITIAL_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
ENDIF()
IF(CMAKE_HOST_UNIX AND NOT FORCE_UNSUPPORTED_COMPILER
AND NOT CMAKE_C_COMPILER AND NOT CMAKE_CXX_COMPILER)
# Cannot INCLUDE(CMakeDetermineSystem) prior to PROJECT initialization below.
SET (ENV_CC "$ENV{CC}")
SET (ENV_CXX "$ENV{CXX}")
IF (ENV_CC STREQUAL "" AND ENV_CXX STREQUAL "")
IF(LINUX_RHEL)
MESSAGE(STATUS "This is ${MATCH_FSYS} as found from 'rpm -qf /'")
ENDIF()
IF(LINUX_RHEL)
MESSAGE(STATUS "Looking for a devtoolset compiler")
IF(LINUX_RHEL7)
# gcc11 not available yet
IF(MY_HOST_MACHINE_NAME MATCHES "aarch64")
SET(ALTERNATIVE_PATHS "/opt/rh/devtoolset-10")
ELSE()
SET(ALTERNATIVE_PATHS "/opt/rh/devtoolset-11")
ENDIF()
ELSEIF(LINUX_RHEL8 OR LINUX_RHEL9)
SET(ALTERNATIVE_PATHS "/opt/rh/gcc-toolset-12")
ENDIF()
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 "${OPT_PATH}/root/usr/bin")
FIND_PROGRAM(ALTERNATIVE_LD ld
NO_DEFAULT_PATH
PATHS "${OPT_PATH}/root/usr/bin")
FIND_PROGRAM(ALTERNATIVE_AR gcc-ar
NO_DEFAULT_PATH
PATHS "${OPT_PATH}/root/usr/bin")
FIND_PROGRAM(ALTERNATIVE_AR ar
NO_DEFAULT_PATH
PATHS "${OPT_PATH}/root/usr/bin")
FIND_PROGRAM(ALTERNATIVE_RANLIB gcc-ranlib
NO_DEFAULT_PATH
PATHS "${OPT_PATH}/root/usr/bin")
FIND_PROGRAM(ALTERNATIVE_RANLIB ranlib
NO_DEFAULT_PATH
PATHS "${OPT_PATH}/root/usr/bin")
FIND_PROGRAM(ALTERNATIVE_ENABLE enable
NO_DEFAULT_PATH
PATHS "${OPT_PATH}")
ENDFOREACH()
# A missing ALTERNATIVE_LD may generate bad executables.
IF(ALTERNATIVE_GCC AND ALTERNATIVE_GPP AND ALTERNATIVE_LD)
# Set correct search path for executables, libraries, and data files.
GET_FILENAME_COMPONENT(GCC_B_PREFIX ${ALTERNATIVE_GCC} DIRECTORY)
STRING_PREPEND(CMAKE_C_FLAGS "-B${GCC_B_PREFIX} ")
GET_FILENAME_COMPONENT(GPP_B_PREFIX ${ALTERNATIVE_GPP} DIRECTORY)
STRING_PREPEND(CMAKE_CXX_FLAGS "-B${GPP_B_PREFIX} ")
SET(CMAKE_C_COMPILER ${ALTERNATIVE_GCC})
SET(CMAKE_CXX_COMPILER ${ALTERNATIVE_GPP})
SET(CMAKE_LINKER ${ALTERNATIVE_LD})
SET(CMAKE_LINKER ${ALTERNATIVE_LD} CACHE PATH "Alternative ld")
IF(ALTERNATIVE_AR)
SET(CMAKE_AR ${ALTERNATIVE_AR})
SET(CMAKE_AR ${ALTERNATIVE_AR} CACHE PATH "Alternative ar")
ENDIF()
IF(ALTERNATIVE_RANLIB)
SET(CMAKE_RANLIB ${ALTERNATIVE_RANLIB})
SET(CMAKE_RANLIB ${ALTERNATIVE_RANLIB} CACHE PATH "Alternative ranlib")
ENDIF()
MESSAGE(STATUS "Using ${ALTERNATIVE_GCC}")
MESSAGE(STATUS "Using ${ALTERNATIVE_GPP}")
ELSE()
IF(LINUX_RHEL7)
IF(MY_HOST_MACHINE_NAME MATCHES "aarch64")
SET(DEV_PACKAGES
"devtoolset-10-gcc devtoolset-10-gcc-c++ devtoolset-10-binutils")
ELSE()
SET(DEV_PACKAGES
"devtoolset-11-gcc devtoolset-11-gcc-c++ devtoolset-11-binutils")
ENDIF()
ELSEIF(LINUX_RHEL8 OR LINUX_RHEL9)
SET(DEV_PACKAGES
"gcc-toolset-12-gcc gcc-toolset-12-gcc-c++ gcc-toolset-12-binutils")
STRING_APPEND(DEV_PACKAGES " gcc-toolset-12-annobin-annocheck")
STRING_APPEND(DEV_PACKAGES " gcc-toolset-12-annobin-plugin-gcc")
ENDIF()
MESSAGE(WARNING
"Could not find devtoolset compiler/linker in ${ALTERNATIVE_PATHS}")
MESSAGE(WARNING "You need to install the required packages:\n"
" yum install ${DEV_PACKAGES}\n")
MESSAGE(FATAL_ERROR
"Or you can set CMAKE_C_COMPILER and CMAKE_CXX_COMPILER explicitly.")
ENDIF()
ELSEIF(LINUX_SUSE_15)
MESSAGE(STATUS "We need to look for a newer GCC on SUSE Linux.")
IF(LINUX_SUSE_15)
FIND_PROGRAM(ALTERNATIVE_GCC gcc-12
NO_DEFAULT_PATH
PATHS "/usr/bin")
FIND_PROGRAM(ALTERNATIVE_GPP g++-12
NO_DEFAULT_PATH
PATHS "/usr/bin")
FIND_PROGRAM(GCC_AR_EXECUTABLE gcc-ar-12
NO_DEFAULT_PATH
PATHS "/usr/bin")
FIND_PROGRAM(GCC_RANLIB_EXECUTABLE gcc-ranlib-12
NO_DEFAULT_PATH
PATHS "/usr/bin")
ENDIF()
IF(GCC_AR_EXECUTABLE)
SET(CMAKE_AR ${GCC_AR_EXECUTABLE})
SET(CMAKE_AR ${GCC_AR_EXECUTABLE} CACHE PATH "Alternative ar")
ENDIF()
IF(GCC_RANLIB_EXECUTABLE)
SET(CMAKE_RANLIB ${GCC_RANLIB_EXECUTABLE})
SET(CMAKE_RANLIB ${GCC_RANLIB_EXECUTABLE} CACHE PATH "Alternative ranlib")
ENDIF()
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 newer gcc.")
MESSAGE(FATAL_ERROR "Please do zypper install gcc12 gcc12-c++\n"
"or set CMAKE_C_COMPILER and CMAKE_CXX_COMPILER explicitly.")
ENDIF()
ELSEIF(SOLARIS)
MESSAGE(STATUS "Looking for GCC 10 on Solaris.")
FIND_PROGRAM(ALTERNATIVE_GCC gcc
NO_DEFAULT_PATH
PATHS "/usr/gcc/10/bin")
FIND_PROGRAM(ALTERNATIVE_GPP g++
NO_DEFAULT_PATH
PATHS "/usr/gcc/10/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}")
ELSE()
MESSAGE(WARNING "Could not find /usr/gcc/10/bin/gcc")
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
${MYSQL_PROJECT_NAME_DOCSTRING} FORCE)
MARK_AS_ADVANCED(MYSQL_PROJECT_NAME)
ENDIF()
# Handle upgrade of old cmake cache
IF(DEFINED WITH_PLUGIN_NDBCLUSTER)
IF(NOT WITH_NDBCLUSTER)
IF(WITH_PLUGIN_NDBCLUSTER OR WITH_NDBCLUSTER_STORAGE_ENGINE)
MESSAGE(FATAL_ERROR
"Old broken config, WITH_NDBCLUSTER_STORAGE_ENGINE have changed "
"meaning, to build MySQL Cluster please add -DWITH_NDB=ON and "
"-UWITH_PLUGIN_NDBCLUSTER")
ENDIF()
ENDIF()
ENDIF()
# Allow WITH_NDBCLUSTER, makes it possible to bisect between
# old and new source code and use cmake -DWITH_NDBCLUSTER=xx for both.
# If both WITH_NDB and WITH_NDBCLUSTER is set they must be equal.
# Else WITH_NDB is set as WITH_NDBCLUSTER.
# WITH_NDBCLUSTER is unset and not cached to not intefere with
# legacy logic in MYSQL_ADD_PLUGIN.
IF(DEFINED WITH_NDBCLUSTER)
SET(HAVE_WITH_NDBCLUSTER 1)
IF(DEFINED WITH_NDB)
# The extra NOTs are needed to normalize the boolean values else for
# example ON is not treated equal to 1.
IF(NOT (NOT WITH_NDB) EQUAL (NOT WITH_NDBCLUSTER))
MESSAGE(FATAL_ERROR
"WITH_NDB=${WITH_NDB} do not match WITH_NDBCLUSTER=${WITH_NDBCLUSTER}")
ENDIF()
SET(WITH_NDB_DEFAULT OFF)
ELSEIF(WITH_NDBCLUSTER)
MESSAGE(WARNING "WITH_NDBCLUSTER option is deprecated, please use "
"WITH_NDB instead. For backward compatibility WITH_NDBCLUSTER=ON sets "
"WITH_NDB=ON")
SET(WITH_NDB_DEFAULT ON)
ELSE()
SET(WITH_NDB_DEFAULT OFF)
ENDIF()
# Unset WITH_NDBCLUSTER to not intefere with MYSQL_ADD_PLUGIN logic.
# It will be added to cache at end of this file.
UNSET(WITH_NDBCLUSTER CACHE)
ELSE()
SET(WITH_NDB_DEFAULT OFF)
ENDIF()
OPTION(WITH_NDB "Build MySQL Cluster" ${WITH_NDB_DEFAULT})
IF(WITH_NDB)
MESSAGE(STATUS "Building MySQL Cluster")
ENDIF()
MESSAGE(STATUS "CMAKE_MODULE_PATH is ${CMAKE_MODULE_PATH}")
INCLUDE(mysql_version)
PROJECT(${MYSQL_PROJECT_NAME}
VERSION ${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION})
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 ${REALPATH_CMAKE_BINARY_DIR}")
# IN PB2 we have a few configurations which are built in-source (e.g. doxygen).
IF(DEFINED ENV{PB2WORKDIR})
OPTION(FORCE_INSOURCE_BUILD "Allow in-source build" ON)
ELSE()
OPTION(FORCE_INSOURCE_BUILD "Allow in-source build" OFF)
ENDIF()
# https://gitlab.kitware.com/cmake/community/wikis/FAQ
# cmake-does-not-generate-a-make-distclean-target-why
# Why disallow in-source build?
# Basically because 'make clean' or 'make distclean' do not work.
# So if you do a 'git pull' you may end up with a developer sandbox
# that no longer works as expected (CMakeCache.txt and other
# generated/configured files may contain data which is no longer valid)
SET(THIS_IS_AN_IN_SOURCE_BUILD FALSE)
IF(${REALPATH_CMAKE_SOURCE_DIR} STREQUAL ${REALPATH_CMAKE_BINARY_DIR})
SET(THIS_IS_AN_IN_SOURCE_BUILD TRUE)
IF(FORCE_INSOURCE_BUILD)
MESSAGE(WARNING "This is an in-source build")
ELSE()
MESSAGE(FATAL_ERROR
"Please do not build in-source. "
"Out-of source builds are highly recommended: "
"you can have multiple builds for the same source, "
"and there is an easy way to do cleanup, "
"simply remove the build directory "
"(note that 'make clean' or 'make distclean' does *not* work) "
"\nYou *can* force in-source build by invoking cmake with -DFORCE_INSOURCE_BUILD=1")
ENDIF()
ENDIF()
IF(WIN32)
STRING(LENGTH "${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()
# 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)
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
arm64
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()
# 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(NOT SIZEOF_VOIDP EQUAL 8)
MESSAGE(FATAL_ERROR "MySQL supports only 64-bit platforms.")
ENDIF()
INCLUDE(compile_flags)
INCLUDE(install_layout)
IF(WITH_ASAN OR WITH_LSAN OR WITH_MSAN OR WITH_TSAN OR WITH_UBSAN)
SET(WITH_SOME_SANITIZER ON)
ELSE()
SET(WITH_SOME_SANITIZER OFF)
ENDIF()
# Add RPM or DEB platform flags for STANDALONE build.
# Not for DEBUG builds, since both platforms use -O2 and _FORTIFY_SOURCE.
# Not for Release or MinSizeRel, it will inflate binary sizes.
IF(LINUX_STANDALONE AND (LINUX_DEB_PLATFORM OR LINUX_RPM_PLATFORM))
# Do not add FORTIFY_SOURCE to any of the sanitizers
# https://github.com/google/sanitizers/issues/247
IF(WITH_SOME_SANITIZER)
SET(WITH_PACKAGE_FLAGS_DEFAULT OFF)
ELSEIF(CMAKE_BUILD_TYPE_UPPER STREQUAL "DEBUG" OR WITH_DEBUG)
SET(WITH_PACKAGE_FLAGS_DEFAULT OFF)
ELSEIF(CMAKE_BUILD_TYPE_UPPER STREQUAL "RELWITHDEBINFO")
SET(WITH_PACKAGE_FLAGS_DEFAULT ON)
ELSE()
SET(WITH_PACKAGE_FLAGS_DEFAULT OFF)
ENDIF()
OPTION(WITH_PACKAGE_FLAGS
"Use DEB/RPM compiler flags" ${WITH_PACKAGE_FLAGS_DEFAULT})
ENDIF()
# Do not set package specific flags if language flags already provided
# in environment or on command line.
# And only for gcc (not clang).
IF(MY_COMPILER_IS_GNU AND WITH_PACKAGE_FLAGS AND
NOT INITIAL_CMAKE_C_FLAGS AND NOT INITIAL_CMAKE_CXX_FLAGS)
IF(LINUX_RPM_PLATFORM)
IF(MY_RPM)
ADD_LINUX_RPM_FLAGS()
ELSE()
MESSAGE(WARNING "rpm executable not found")
ENDIF()
ELSEIF(LINUX_DEB_PLATFORM)
IF(MY_DPKG_BUILDFLAGS)
ADD_LINUX_DEB_FLAGS()
ELSE()
MESSAGE(WARNING "dpkg-buildflags executable not found")
MESSAGE(WARNING "Please do 'apt install dpkg-dev'")
ENDIF()
ENDIF()
ENDIF()
IF(WITH_DEFAULT_COMPILER_OPTIONS)
INCLUDE(${CMAKE_SOURCE_DIR}/cmake/build_configurations/compiler_options.cmake)
ENDIF()
# Assume, for now at least, that we want build-id for all kinds of Linux builds.
IF(LINUX AND NOT LINUX_ALPINE)
OPTION(WITH_BUILD_ID "Add --build-id=sha1 to all executables." ON)
IF(WITH_BUILD_ID)
SET(HAVE_BUILD_ID_SUPPORT 1)
FIND_PROGRAM(READELF_EXECUTABLE
NAMES eu-readelf readelf
)
IF(NOT READELF_EXECUTABLE)
MESSAGE(WARNING "Cannot find eu-readelf or readelf")
MESSAGE(FATAL_ERROR
"Install the 'elfutils' package, or do cmake -DWITH_BUILD_ID=OFF")
ENDIF()
ENDIF()
ENDIF()
INCLUDE(CMakePushCheckState)
OPTION(WITH_XTRABACKUP "Build XtraBackup" ON)
# Disallow WITH_XTRABACKUP=OFF builds
IF(NOT WITH_XTRABACKUP)
MESSAGE(FATAL_ERROR "This branch does not support -DWITH_XTRABACKUP=OFF configuration.")
ELSE()
ADD_DEFINITIONS(-DXTRABACKUP)
ENDIF()
# Disallow WITHOUT_SERVER=ON builds
IF(WITHOUT_SERVER)
MESSAGE(FATAL_ERROR "This branch does not support -DWITHOUT_SERVER=ON configuration.")
ENDIF()
# Add macros
INCLUDE(add_custom_target)
INCLUDE(pkg-config)
INCLUDE(character_sets)
INCLUDE(link_options)
INCLUDE(malloc_utils)
INCLUDE(cpu_info)
INCLUDE(fileutils)
INCLUDE(zlib)
INCLUDE(zstd)
INCLUDE(lz4)
INCLUDE(icu)
INCLUDE(libbacktrace)
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(mysql_add_executable)
INCLUDE(curl)
INCLUDE(rapidjson)
INCLUDE(fprofile)
INCLUDE(fido2)
INCLUDE(win_jemalloc)
INCLUDE(libs_mysql_create_library)
INCLUDE(libcno)
# To simplify building of JET, skip all dependencies for other targets.
IF(EXISTS ${CMAKE_SOURCE_DIR}/internal/CMakeLists.txt)
OPTION(WITH_JET_ONLY "Build JET only. No C/C++ targets." OFF)
IF(WITH_JET_ONLY)
SET(WITH_JET ON)
SET(WITH_JET ON CACHE INTERNAL "Build JET" FORCE)
ADD_SUBDIRECTORY(internal/jet)
RETURN()
ENDIF()
ENDIF()
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(DISABLE_SHARED
"Don't build shared libraries, compile code as position-dependent" OFF)
IF(DISABLE_SHARED)
MESSAGE("Dynamic plugins are disabled.")
ENDIF()
OPTION(ENABLED_PROFILING "Enable profiling" OFF)
OPTION(WITHOUT_SERVER OFF)
IF(WIN32)
OPTION(WITH_MSCRT_DEBUG "MS Visual Studio Debug CRT instrumentation" OFF)
ENDIF()
IF(NOT WITHOUT_SERVER)
IF(FPROFILE_GENERATE OR FPROFILE_USE)
# Do not use data from unit testing when optimizing.
OPTION(WITH_UNIT_TESTS "Compile MySQL with unit tests" OFF)
ELSE()
OPTION(WITH_UNIT_TESTS "Compile MySQL with unit tests" OFF)
ENDIF()
OPTION(WITH_ROUTER "Build MySQL Router" OFF)
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})
# Currently only supported on Linux
IF(WITH_INTERNAL AND LINUX)
SET(WITH_AUTHENTICATION_KERBEROS_DEFAULT ON)
ELSE()
SET(WITH_AUTHENTICATION_KERBEROS_DEFAULT OFF)
ENDIF()
OPTION(WITH_AUTHENTICATION_KERBEROS
"Report error if the Kerberos authentication plugin cannot be built."
${WITH_AUTHENTICATION_KERBEROS_DEFAULT})
IF(WITH_INTERNAL AND (NOT SOLARIS))
SET(WITH_AUTHENTICATION_WEBAUTHN_DEFAULT ON)
ELSE()
SET(WITH_AUTHENTICATION_WEBAUTHN_DEFAULT OFF)
ENDIF()
IF(WITH_INTERNAL)
SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/internal/cmake)
ENDIF()
OPTION(WITH_AUTHENTICATION_WEBAUTHN
"Report error if the WEBAUTHN authentication plugin cannot be built."
${WITH_AUTHENTICATION_WEBAUTHN_DEFAULT})
# Default ON if we are building server-side plugins.
# Also default ON in pushbuild, for our community builds.
IF(WITH_AUTHENTICATION_KERBEROS OR
WITH_AUTHENTICATION_LDAP OR
WITH_AUTHENTICATION_WEBAUTHN OR
DEFINED ENV{PB2WORKDIR})
SET(WITH_AUTHENTICATION_CLIENT_PLUGINS_DEFAULT ON)
ELSE()
SET(WITH_AUTHENTICATION_CLIENT_PLUGINS_DEFAULT OFF)
ENDIF()
# Enable building of
# The KERBEROS client authentication plugin
# authentication_kerberos_client.so
# The LDAP client authentication plugin
# authentication_ldap_sasl_client.so
# The WEBAUTHN client authentication plugin
# authentication_webauthn_client.so
# The OCI client authentication plugin
# authentication_oci_client.so
OPTION(WITH_AUTHENTICATION_CLIENT_PLUGINS
"Build client-side authentication plugins, even if server-side are disabled"
${WITH_AUTHENTICATION_CLIENT_PLUGINS_DEFAULT})
IF(NOT WITH_AUTHENTICATION_WEBAUTHN AND
NOT WITH_AUTHENTICATION_CLIENT_PLUGINS)
SET(WITH_FIDO "none")
SET(WITH_FIDO "none" CACHE STRING "fido2 is disabled")
ENDIF()
IF(WITH_INTERNAL)
IF(UNIX)
SET(WITH_CURL_DEFAULT "system")
ELSE()
SET(WITH_CURL_DEFAULT "bundled")
ENDIF()
ELSE()
SET(WITH_CURL_DEFAULT "none")
ENDIF()
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.