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cmake_minimum_required(VERSION 3.9)
project(zlib
LANGUAGES C
VERSION 1.3.1.1)
option(ZLIB_BUILD_TESTING "Enable Zlib Examples as tests" ON)
option(ZLIB_BUILD_SHARED "Enable building zlib shared library" ON)
option(ZLIB_BUILD_STATIC "Enable building zlib static library" ON)
option(ZLIB_INSTALL_LIBRARIES "Enable installation of zlib" ON)
if(WIN32)
option(ZLIB_INSTALL_COMPAT_DLL "Install a copy as zlib1.dll" ON)
endif(WIN32)
get_property(IS_MULTI GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
if(NOT DEFINED CMAKE_BUILD_TYPE AND NOT IS_MULTI)
message(STATUS "No CMAKE_BUILD_TYPE set -- using Release")
set(CMAKE_BUILD_TYPE Release)
endif(NOT DEFINED CMAKE_BUILD_TYPE AND NOT IS_MULTI)
include(CheckTypeSize)
include(CheckFunctionExists)
include(CheckIncludeFile)
include(CheckCSourceCompiles)
include(GNUInstallDirs)
#
# Check to see if we have large file support
#
set(CMAKE_REQUIRED_DEFINITIONS -D_LARGEFILE64_SOURCE=1)
check_type_size(off64_t OFF64_T)
set(CMAKE_REQUIRED_DEFINITIONS) # clear variable
#
# Check for fseeko
#
check_function_exists(fseeko HAVE_FSEEKO)
#
# Check for unistd.h
#
check_include_file(unistd.h Z_HAVE_UNISTD_H)
set(ZLIB_PC ${zlib_BINARY_DIR}/zlib.pc)
configure_file(${zlib_SOURCE_DIR}/zlib.pc.cmakein
${ZLIB_PC} @ONLY)
configure_file(${zlib_SOURCE_DIR}/zconf.h.cmakein
${zlib_BINARY_DIR}/zconf.h @ONLY)
include_directories(${zlib_BINARY_DIR} ${zlib_SOURCE_DIR})
#============================================================================
# zlib
#============================================================================
set(ZLIB_PUBLIC_HDRS
${zlib_BINARY_DIR}/zconf.h
zlib.h)
set(ZLIB_PRIVATE_HDRS
crc32.h
deflate.h
gzguts.h
inffast.h
inffixed.h
inflate.h
inftrees.h
trees.h
zutil.h)
set(ZLIB_SRCS
adler32.c
compress.c
crc32.c
deflate.c
gzclose.c
gzlib.c
gzread.c
gzwrite.c
inflate.c
infback.c
inftrees.c
inffast.c
trees.c
uncompr.c
zutil.c)
set_source_files_properties(win32/zlib1.rc PROPERTIES
COMPILE_FLAGS $<$<STREQUAL:${CMAKE_RC_OUTPUT_EXTENSION},.obj>:-DGCC_WINDRES>)
if(WIN32)
set(zlib_static_suffix "s")
set(CMAKE_DEBUG_POSTFIX "d")
endif(WIN32)
if(ZLIB_BUILD_SHARED)
add_library(zlib SHARED
${ZLIB_SRCS}
${ZLIB_DLL_SRCS}
${ZLIB_PUBLIC_HDRS}
${ZLIB_PRIVATE_HDRS}
$<$<OR:$<BOOL:${WIN32}>,$<BOOL:${CYGWIN}>>:win32/zlib1.rc>)
add_library(ZLIB::ZLIB ALIAS zlib)
target_include_directories(zlib PUBLIC
$<BUILD_INTERFACE:${zlib_BINARY_DIR}>
$<BUILD_INTERFACE:${zlib_SOURCE_DIR}>
$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
target_compile_definitions(zlib
PRIVATE
$<$<BOOL:${HAVE_OFF64_T}>:_LARGEFILE64_SOURCE=1>
$<$<BOOL:NOT:${HAVE_FSEEKO}>:NO_FSEEKO>
$<$<BOOL:${MSVC}>:_CRT_SECURE_NO_DEPRECATE>
$<$<BOOL:${MSVC}>:_CRT_NONSTDC_NO_DEPRECATE>)
# The VERSION property causes shared libraries on Linux to have the full version
# encoded into their final filename. We disable this on Cygwin because
# it causes cygz-${ZLIB_FULL_VERSION}.dll to be created when cygz.dll
# seems to be the default.
#
# This has no effect with MSVC, on that platform the version info for
# the DLL comes from the resource file win32/zlib1.rc
set_target_properties(zlib PROPERTIES
DEFINE_SYMBOL ZLIB_DLL
EXPORT_NAME ZLIB
OUTPUT_NAME z
SOVERSION 1
$<$<BOOL:NOT:$CYGWIN}>:VERSION ${zlib_VERSION}>)
if(UNIX AND NOT APPLE AND NOT(CMAKE_SYSTEM_NAME STREQUAL AIX))
# On unix-like platforms the library is almost always called libz
set_target_properties(zlib PROPERTIES
LINK_FLAGS "-Wl,--version-script,\"${zlib_SOURCE_DIR}/zlib.map\"")
endif(UNIX AND NOT APPLE AND NOT(CMAKE_SYSTEM_NAME STREQUAL AIX))
endif(ZLIB_BUILD_SHARED)
if(ZLIB_BUILD_STATIC)
add_library(zlibstatic STATIC
${ZLIB_SRCS}
${ZLIB_PUBLIC_HDRS}
${ZLIB_PRIVATE_HDRS})
add_library(ZLIB::ZLIBSTATIC ALIAS zlibstatic)
target_include_directories(zlibstatic PUBLIC
$<BUILD_INTERFACE:${zlib_BINARY_DIR}>
$<BUILD_INTERFACE:${zlib_SOURCE_DIR}>
$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
target_compile_definitions(zlibstatic
PRIVATE
$<$<BOOL:NOT:${HAVE_FSEEKO}>:NO_FSEEKO>
$<$<BOOL:${MSVC}>:_CRT_SECURE_NO_DEPRECATE>
$<$<BOOL:${MSVC}>:_CRT_NONSTDC_NO_DEPRECATE>
PUBLIC
$<$<BOOL:${HAVE_OFF64_T}>:_LARGEFILE64_SOURCE=1>)
set_target_properties(zlibstatic PROPERTIES
EXPORT_NAME ZLIBSTATIC
OUTPUT_NAME z${zlib_static_suffix})
endif(ZLIB_BUILD_STATIC)
if(ZLIB_INSTALL_LIBRARIES)
if(ZLIB_BUILD_SHARED)
install(TARGETS zlib
COMPONENT Runtime
RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")
if(ZLIB_INSTALL_COMPAT_DLL)
install(FILES $<TARGET_FILE:zlib>
COMPONENT Runtime
RENAME zlib1.dll
DESTINATION "${CMAKE_INSTALL_BINDIR}")
endif(ZLIB_INSTALL_COMPAT_DLL)
if(MSVC)
install(FILES $<TARGET_PDB_FILE:zlib>
COMPONENT Runtime
DESTINATION ${CMAKE_INSTALL_BINDIR}
CONFIGURATIONS Debug OR RelWithDebInfo
OPTIONAL
)
endif(MSVC)
endif(ZLIB_BUILD_SHARED)
if(ZLIB_BUILD_STATIC)
install(TARGETS zlibstatic
COMPONENT Development
RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")
endif(ZLIB_BUILD_STATIC)
install(FILES ${ZLIB_PUBLIC_HDRS}
COMPONENT Development
DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
FILES zlib.3
COMPONENT Development
DESTINATION "${CMAKE_INSTALL_MANDIR}/man3"
FILES ${ZLIB_PC}
COMPONENT Development
DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
endif(ZLIB_INSTALL_LIBRARIES)
#============================================================================
# Example binaries
#============================================================================
if(ZLIB_BUILD_TESTING)
enable_testing()
add_executable(zlib_example test/example.c)
target_link_libraries(zlib_example ZLIB::ZLIB)
add_test(zlib_example zlib_example)
add_executable(minigzip test/minigzip.c)
target_link_libraries(minigzip ZLIB::ZLIB)
if(HAVE_OFF64_T)
add_executable(zlib_example64 test/example.c)
target_compile_definitions(zlib_example64 PRIVATE LARGEFILE64_SOURCE=1)
target_link_libraries(zlib_example64 ZLIB::ZLIB)
add_test(zlib_example64 zlib_example64)
add_executable(minigzip64 test/minigzip.c)
target_compile_definitions(minigzip64 PRIVATE LARGEFILE64_SOURCE=1)
target_link_libraries(minigzip64 ZLIB::ZLIB)
endif(HAVE_OFF64_T)
endif(ZLIB_BUILD_TESTING)
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