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# Copyright (c) 2015, 2025, 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
# cmake -DWITH_LZ4=system|bundled
# bundled is the default
FUNCTION(FIND_LZ4_VERSION LZ4_INCLUDE_DIR)
FOREACH(version_part
LZ4_VERSION_MAJOR
LZ4_VERSION_MINOR
LZ4_VERSION_RELEASE
)
FILE(STRINGS "${LZ4_INCLUDE_DIR}/lz4.h" ${version_part}
REGEX "^#[\t ]*define[\t ]+${version_part}[\t ]+([0-9]+).*")
STRING(REGEX REPLACE
"^.*${version_part}[\t ]+([0-9]+).*" "\\1"
${version_part} "${${version_part}}")
ENDFOREACH()
SET(LZ4_VERSION
"${LZ4_VERSION_MAJOR}.${LZ4_VERSION_MINOR}.${LZ4_VERSION_RELEASE}")
MESSAGE(STATUS "LZ4_VERSION (${WITH_LZ4}) is ${LZ4_VERSION}")
MESSAGE(STATUS "LZ4_INCLUDE_DIR ${LZ4_INCLUDE_DIR}")
ENDFUNCTION(FIND_LZ4_VERSION)
FUNCTION(FIND_SYSTEM_LZ4)
FIND_PATH(LZ4_INCLUDE_DIR
NAMES lz4frame.h)
FIND_LIBRARY(LZ4_SYSTEM_LIBRARY
NAMES lz4)
IF (LZ4_INCLUDE_DIR AND LZ4_SYSTEM_LIBRARY)
SET(SYSTEM_LZ4_FOUND 1 CACHE INTERNAL "")
ADD_LIBRARY(lz4_interface INTERFACE)
TARGET_LINK_LIBRARIES(lz4_interface INTERFACE ${LZ4_SYSTEM_LIBRARY})
IF(NOT LZ4_INCLUDE_DIR STREQUAL "/usr/include/")
TARGET_INCLUDE_DIRECTORIES(lz4_interface
SYSTEM INTERFACE ${LZ4_INCLUDE_DIR})
ENDIF()
FIND_LZ4_VERSION(${LZ4_INCLUDE_DIR})
ENDIF()
ENDFUNCTION(FIND_SYSTEM_LZ4)
SET(LZ4_VERSION "lz4-1.10.0")
SET(BUNDLED_LZ4_PATH "${CMAKE_SOURCE_DIR}/extra/lz4/${LZ4_VERSION}/lib")
FUNCTION(MYSQL_USE_BUNDLED_LZ4)
ADD_LIBRARY(lz4_interface INTERFACE)
TARGET_LINK_LIBRARIES(lz4_interface INTERFACE lz4_lib)
TARGET_INCLUDE_DIRECTORIES(lz4_interface SYSTEM BEFORE INTERFACE
${BUNDLED_LZ4_PATH})
FIND_LZ4_VERSION(${BUNDLED_LZ4_PATH})
ADD_SUBDIRECTORY(extra/lz4)
ENDFUNCTION(MYSQL_USE_BUNDLED_LZ4)
MACRO (MYSQL_CHECK_LZ4)
IF(NOT WITH_LZ4)
SET(WITH_LZ4 "bundled" CACHE STRING "By default use bundled lz4 library")
ENDIF()
IF(WITH_LZ4 STREQUAL "bundled")
MYSQL_USE_BUNDLED_LZ4()
ELSEIF(WITH_LZ4 STREQUAL "system")
FIND_SYSTEM_LZ4()
IF (NOT SYSTEM_LZ4_FOUND)
MESSAGE(FATAL_ERROR "Cannot find system lz4 libraries.")
ENDIF()
ELSE()
MESSAGE(FATAL_ERROR "WITH_LZ4 must be bundled or system")
ENDIF()
ADD_LIBRARY(ext::lz4 ALIAS lz4_interface)
ENDMACRO()
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