cmake_minimum_required(VERSION 2.4.4)

set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)

project(zlib C)

set(VERSION "1.2.7")

set(INSTALL_BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")

set(INSTALL_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")

set(INSTALL_INC_DIR "${CMAKE_INSTALL_PREFIX}/include" CACHE PATH "Installation directory for headers")

set(INSTALL_MAN_DIR "${CMAKE_INSTALL_PREFIX}/share/man" CACHE PATH "Installation directory for manual pages")

set(INSTALL_PKGCONFIG_DIR "${CMAKE_INSTALL_PREFIX}/share/pkgconfig" CACHE PATH "Installation directory for pkgconfig (.pc) files")

include(CheckTypeSize)

include(CheckFunctionExists)

include(CheckIncludeFile)

include(CheckCSourceCompiles)

enable_testing()

check_include_file(sys/types.h HAVE_SYS_TYPES_H)

check_include_file(stdint.h    HAVE_STDINT_H)

check_include_file(stddef.h    HAVE_STDDEF_H)

#

# Check to see if we have large file support

#

set(CMAKE_REQUIRED_DEFINITIONS -D_LARGEFILE64_SOURCE=1)

# We add these other definitions here because CheckTypeSize.cmake

# in CMake 2.4.x does not automatically do so and we want

# compatibility with CMake 2.4.x.

if(HAVE_SYS_TYPES_H)

    list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_SYS_TYPES_H)

endif()

if(HAVE_STDINT_H)

    list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDINT_H)

endif()

if(HAVE_STDDEF_H)

    list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDDEF_H)

endif()

check_type_size(off64_t OFF64_T)

if(HAVE_OFF64_T)

   add_definitions(-D_LARGEFILE64_SOURCE=1)

endif()

set(CMAKE_REQUIRED_DEFINITIONS) # clear variable

#

# Check for fseeko

#

check_function_exists(fseeko HAVE_FSEEKO)

if(NOT HAVE_FSEEKO)

    add_definitions(-DNO_FSEEKO)

endif()

#

# Check for unistd.h

#

check_include_file(unistd.h Z_HAVE_UNISTD_H)

if(MSVC)

    set(CMAKE_DEBUG_POSTFIX "d")

    add_definitions(-D_CRT_SECURE_NO_DEPRECATE)

    add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE)

    include_directories(${CMAKE_CURRENT_SOURCE_DIR})

endif()

if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)

    # If we're doing an out of source build and the user has a zconf.h

    # in their source tree...

    if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h)

        message(STATUS "Renaming")

        message(STATUS "    ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h")

        message(STATUS "to 'zconf.h.included' because this file is included with zlib")

        message(STATUS "but CMake generates it automatically in the build directory.")

        file(RENAME ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.included)

  endif()

endif()

set(ZLIB_PC ${CMAKE_CURRENT_BINARY_DIR}/zlib.pc)

configure_file( ${CMAKE_CURRENT_SOURCE_DIR}/zlib.pc.cmakein

		${ZLIB_PC} @ONLY)

configure_file(	${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.cmakein

		${CMAKE_CURRENT_BINARY_DIR}/zconf.h @ONLY)

include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_SOURCE_DIR})

#============================================================================

# zlib

#============================================================================

set(ZLIB_PUBLIC_HDRS

    ${CMAKE_CURRENT_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

)

if(NOT MINGW)

    set(ZLIB_SRCS ${ZLIB_SRCS}

        win32/zlib1.rc # If present will override custom build rule below.

    )

endif()

# parse the full version number from zlib.h and include in ZLIB_FULL_VERSION

file(READ ${CMAKE_CURRENT_SOURCE_DIR}/zlib.h _zlib_h_contents)

string(REGEX REPLACE ".*#define[ \t]+ZLIB_VERSION[ \t]+\"([-0-9A-Za-z.]+)\".*"

    "\\1" ZLIB_FULL_VERSION ${_zlib_h_contents})

if(MINGW)

    # This gets us DLL resource information when compiling on MinGW.

    if(NOT CMAKE_RC_COMPILER)

        SET(CMAKE_RC_COMPILER windres.exe)

    endif()

    add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj

                       COMMAND ${CMAKE_RC_COMPILER}

                            -D GCC_WINDRES

                            -I ${CMAKE_CURRENT_SOURCE_DIR}

                            -I ${CMAKE_CURRENT_BINARY_DIR}

                            -o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj

                            -i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib1.rc)

    set(ZLIB_SRCS ${ZLIB_SRCS} ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)

endif(MINGW)

add_library(zlib SHARED ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})

add_library(zlibstatic STATIC ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})

set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)

set_target_properties(zlib PROPERTIES SOVERSION 1)

if(NOT CYGWIN)

    # This 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 VERSION ${ZLIB_FULL_VERSION})

endif()

if(UNIX)

    # On unix-like platforms the library is almost always called libz

   set_target_properties(zlib zlibstatic PROPERTIES OUTPUT_NAME z)

   set_target_properties(zlib PROPERTIES LINK_FLAGS "-Wl,--version-script,${CMAKE_CURRENT_SOURCE_DIR}/zlib.map")

elseif(BUILD_SHARED_LIBS AND WIN32)

    # Creates zlib1.dll when building shared library version

    set_target_properties(zlib PROPERTIES SUFFIX "1.dll")

endif()

if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )

    install(TARGETS zlib zlibstatic

        RUNTIME DESTINATION "${INSTALL_BIN_DIR}"

        ARCHIVE DESTINATION "${INSTALL_LIB_DIR}"

        LIBRARY DESTINATION "${INSTALL_LIB_DIR}" )

endif()

if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )

    install(FILES ${ZLIB_PUBLIC_HDRS} DESTINATION "${INSTALL_INC_DIR}")

endif()

if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )

    install(FILES zlib.3 DESTINATION "${INSTALL_MAN_DIR}/man3")

endif()

if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )

    install(FILES ${ZLIB_PC} DESTINATION "${INSTALL_PKGCONFIG_DIR}")

endif()

#============================================================================

# Example binaries

#============================================================================

add_executable(example test/example.c)

target_link_libraries(example zlib)

add_test(example example)

add_executable(minigzip test/minigzip.c)

target_link_libraries(minigzip zlib)

if(HAVE_OFF64_T)

    add_executable(example64 test/example.c)

    target_link_libraries(example64 zlib)

    set_target_properties(example64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")

    add_test(example64 example64)

    add_executable(minigzip64 test/minigzip.c)

    target_link_libraries(minigzip64 zlib)

    set_target_properties(minigzip64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")

endif()