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# SPDX-License-Identifier: Apache-2.0
#
# Copyright (C) 2023 The Falco Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
# specific language governing permissions and limitations under the License.
#
option(USE_BUNDLED_ZLIB "Enable building of the bundled zlib" ${USE_BUNDLED_DEPS})
if(ZLIB_INCLUDE)
# we already have zlib
elseif(NOT USE_BUNDLED_ZLIB)
find_path(ZLIB_INCLUDE zlib.h PATH_SUFFIXES zlib)
find_library(ZLIB_LIB NAMES z)
if(ZLIB_INCLUDE AND ZLIB_LIB)
message(STATUS "Found zlib: include: ${ZLIB_INCLUDE}, lib: ${ZLIB_LIB}")
else()
message(FATAL_ERROR "Couldn't find system zlib")
endif()
else()
set(ZLIB_SRC "${PROJECT_BINARY_DIR}/zlib-prefix/src/zlib")
set(ZLIB_INCLUDE "${ZLIB_SRC}")
set(ZLIB_HEADERS "")
list(APPEND ZLIB_HEADERS
"${ZLIB_INCLUDE}/crc32.h"
"${ZLIB_INCLUDE}/deflate.h"
"${ZLIB_INCLUDE}/gzguts.h"
"${ZLIB_INCLUDE}/inffast.h"
"${ZLIB_INCLUDE}/inffixed.h"
"${ZLIB_INCLUDE}/inflate.h"
"${ZLIB_INCLUDE}/inftrees.h"
"${ZLIB_INCLUDE}/trees.h"
"${ZLIB_INCLUDE}/zconf.h"
"${ZLIB_INCLUDE}/zlib.h"
"${ZLIB_INCLUDE}/zutil.h"
)
if(NOT TARGET zlib)
set(ZLIB_CFLAGS )
if (ENABLE_PIC)
set(ZLIB_CFLAGS -fPIC)
endif()
message(STATUS "Using bundled zlib in '${ZLIB_SRC}'")
if(NOT WIN32)
if(BUILD_SHARED_LIBS)
set(ZLIB_LIB_SUFFIX ${CMAKE_SHARED_LIBRARY_SUFFIX})
set(ZLIB_CONFIGURE_FLAGS )
else()
set(ZLIB_LIB_SUFFIX ${CMAKE_STATIC_LIBRARY_SUFFIX})
set(ZLIB_CONFIGURE_FLAGS "--static")
endif()
set(ZLIB_LIB "${ZLIB_SRC}/libz${ZLIB_LIB_SUFFIX}")
ExternalProject_Add(zlib
PREFIX "${PROJECT_BINARY_DIR}/zlib-prefix"
URL "https://github.com/madler/zlib/archive/v1.2.13.tar.gz"
URL_HASH "SHA256=1525952a0a567581792613a9723333d7f8cc20b87a81f920fb8bc7e3f2251428"
CONFIGURE_COMMAND CFLAGS=${ZLIB_CFLAGS} ./configure --prefix=${ZLIB_SRC} ${ZLIB_CONFIGURE_FLAGS}
BUILD_COMMAND make
BUILD_IN_SOURCE 1
BUILD_BYPRODUCTS ${ZLIB_LIB}
INSTALL_COMMAND "")
install(FILES "${ZLIB_LIB}" DESTINATION "${CMAKE_INSTALL_LIBDIR}/${LIBS_PACKAGE_NAME}"
COMPONENT "libs-deps")
install(FILES ${ZLIB_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/${LIBS_PACKAGE_NAME}/zlib"
COMPONENT "libs-deps")
else()
if(BUILD_SHARED_LIBS)
set(ZLIB_LIB_SUFFIX "${CMAKE_SHARED_LIBRARY_SUFFIX}")
set(ZLIB_LIB "${ZLIB_SRC}/lib/zlib${ZLIB_LIB_SUFFIX}")
else()
set(ZLIB_LIB_SUFFIX "${CMAKE_STATIC_LIBRARY_SUFFIX}")
set(ZLIB_LIB "${ZLIB_SRC}/lib/zlibstatic${ZLIB_LIB_SUFFIX}")
endif()
ExternalProject_Add(zlib
PREFIX "${PROJECT_BINARY_DIR}/zlib-prefix"
URL "https://github.com/madler/zlib/archive/v1.2.13.tar.gz"
URL_HASH "SHA256=1525952a0a567581792613a9723333d7f8cc20b87a81f920fb8bc7e3f2251428"
BUILD_IN_SOURCE 1
BUILD_BYPRODUCTS ${ZLIB_LIB}
CMAKE_ARGS
-DCMAKE_POLICY_DEFAULT_CMP0091:STRING=NEW
-DCMAKE_MSVC_RUNTIME_LIBRARY=${CMAKE_MSVC_RUNTIME_LIBRARY}
-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
-DCMAKE_POSITION_INDEPENDENT_CODE=${ENABLE_PIC}
-DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}
-DCMAKE_INSTALL_PREFIX=${ZLIB_SRC})
install(FILES "${ZLIB_LIB}" DESTINATION "${CMAKE_INSTALL_LIBDIR}/${LIBS_PACKAGE_NAME}"
COMPONENT "libs-deps")
install(FILES ${ZLIB_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/${LIBS_PACKAGE_NAME}/zlib"
COMPONENT "libs-deps")
endif()
endif()
endif()
if(NOT TARGET zlib)
add_custom_target(zlib)
endif()
include_directories(${ZLIB_INCLUDE})
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