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zlib.cmake
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zlib.cmake
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# Copyright (c) 2009, 2023, 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
# Usage:
# cmake -DWITH_ZLIB="bundled"|"system"
#
# Default is "bundled".
# The default should be "system" on non-windows platforms,
# but we need at least version 1.2.11, and that's not available on
# all the platforms we need to support.
# Security bug fixes required from:
SET(MIN_ZLIB_VERSION_REQUIRED "1.2.13")
FUNCTION(FIND_ZLIB_VERSION ZLIB_INCLUDE_DIR)
FOREACH(version_part
ZLIB_VER_MAJOR
ZLIB_VER_MINOR
ZLIB_VER_REVISION
)
FILE(STRINGS "${ZLIB_INCLUDE_DIR}/zlib.h" ${version_part}
REGEX "^#[\t ]*define[\t ]+${version_part}[\t ]+([0-9]+).*")
STRING(REGEX REPLACE
"^.*${version_part}[\t ]+([0-9]+).*" "\\1"
${version_part} "${${version_part}}")
ENDFOREACH()
SET(ZLIB_VERSION "${ZLIB_VER_MAJOR}.${ZLIB_VER_MINOR}.${ZLIB_VER_REVISION}")
SET(ZLIB_VERSION "${ZLIB_VERSION}" CACHE INTERNAL "ZLIB major.minor.step")
MESSAGE(STATUS "ZLIB_VERSION (${WITH_ZLIB}) is ${ZLIB_VERSION}")
MESSAGE(STATUS "ZLIB_INCLUDE_DIR ${ZLIB_INCLUDE_DIR}")
ENDFUNCTION(FIND_ZLIB_VERSION)
FUNCTION(FIND_SYSTEM_ZLIB)
FIND_PACKAGE(ZLIB)
IF(ZLIB_FOUND)
ADD_LIBRARY(zlib_interface INTERFACE)
TARGET_LINK_LIBRARIES(zlib_interface INTERFACE ${ZLIB_LIBRARIES})
IF(NOT ZLIB_INCLUDE_DIR STREQUAL "/usr/include")
TARGET_INCLUDE_DIRECTORIES(zlib_interface SYSTEM INTERFACE
${ZLIB_INCLUDE_DIR})
ENDIF()
ENDIF()
ENDFUNCTION(FIND_SYSTEM_ZLIB)
MACRO (RESET_ZLIB_VARIABLES)
# Reset whatever FIND_PACKAGE may have left behind.
FOREACH(zlibvar
INCLUDE_DIR
INCLUDE_DIRS
LIBRARY
LIBRARIES
LIBRARY_DEBUG
LIBRARY_RELEASE)
UNSET(ZLIB_${zlibvar})
UNSET(ZLIB_${zlibvar} CACHE)
UNSET(ZLIB_${zlibvar}-ADVANCED CACHE)
ENDFOREACH()
UNSET(FIND_PACKAGE_MESSAGE_DETAILS_ZLIB)
UNSET(FIND_PACKAGE_MESSAGE_DETAILS_ZLIB CACHE)
ENDMACRO()
SET(ZLIB_VERSION_DIR "zlib-1.2.13")
SET(BUNDLED_ZLIB_PATH ${CMAKE_SOURCE_DIR}/extra/zlib/${ZLIB_VERSION_DIR})
FUNCTION(MYSQL_USE_BUNDLED_ZLIB)
RESET_ZLIB_VARIABLES()
ADD_LIBRARY(zlib_interface INTERFACE)
TARGET_LINK_LIBRARIES(zlib_interface INTERFACE zlib)
TARGET_INCLUDE_DIRECTORIES(zlib_interface SYSTEM BEFORE INTERFACE
${CMAKE_SOURCE_DIR}/extra/zlib/${ZLIB_VERSION_DIR}
${CMAKE_BINARY_DIR}/extra/zlib/${ZLIB_VERSION_DIR}
)
FIND_ZLIB_VERSION(${BUNDLED_ZLIB_PATH})
ADD_SUBDIRECTORY(extra/zlib/${ZLIB_VERSION_DIR})
# Add support for bundled curl.
ADD_LIBRARY(ZLIB::ZLIB ALIAS zlib_interface)
ENDFUNCTION(MYSQL_USE_BUNDLED_ZLIB)
MACRO (MYSQL_CHECK_ZLIB)
IF(NOT WITH_ZLIB)
SET(WITH_ZLIB "bundled"
CACHE STRING "By default use bundled zlib on this platform")
ENDIF()
IF(WITH_ZLIB STREQUAL "bundled")
MYSQL_USE_BUNDLED_ZLIB()
ELSEIF(WITH_ZLIB STREQUAL "system")
FIND_SYSTEM_ZLIB()
IF(NOT ZLIB_FOUND)
MESSAGE(FATAL_ERROR "Cannot find system zlib libraries.")
ENDIF()
ELSE()
RESET_ZLIB_VARIABLES()
MESSAGE(FATAL_ERROR "WITH_ZLIB must be bundled or system")
ENDIF()
ADD_LIBRARY(ext::zlib ALIAS zlib_interface)
IF(ZLIB_VERSION VERSION_LESS MIN_ZLIB_VERSION_REQUIRED)
MESSAGE(FATAL_ERROR
"ZLIB version must be at least ${MIN_ZLIB_VERSION_REQUIRED}, "
"found ${ZLIB_VERSION}.\nPlease use -DWITH_ZLIB=bundled")
ENDIF()
ENDMACRO()