CMakeLists.txt

#  For more information, please see: http://software.sci.utah.edu
#
#  The MIT License
#
#  Copyright (c) 2012 Scientific Computing and Imaging Institute,
#  University of Utah.
# 
#  
#  Permission is hereby granted, free of charge, to any person obtaining a
#  copy of this software and associated documentation files (the "Software"),
#  to deal in the Software without restriction, including without limitation
#  the rights to use, copy, modify, merge, publish, distribute, sublicense,
#  and/or sell copies of the Software, and to permit persons to whom the
#  Software is furnished to do so, subject to the following conditions:#  
#  The above copyright notice and this permission notice shall be included
#  in all copies or substantial portions of the Software.
# 
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
#  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
#  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
#  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
#  DEALINGS IN THE SOFTWARE.   

cmake_minimum_required(VERSION 2.4.4)
set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)

project(zlib C)


########################################################################
# Set the name of the library
SET(SCI_ZLIB_LIBRARY z CACHE INTERNAL "Zlib library name.")


########################################################################
# Include directory

SET(SCI_ZLIB_INCLUDE "${CMAKE_CURRENT_SOURCE_DIR};${CMAKE_CURRENT_BINARY_DIR}" CACHE INTERNAL "Zlib include directories.")


set(VERSION "1.2.8")

option(ASM686 "Enable building i686 assembly implementation")
option(AMD64 "Enable building amd64 assembly implementation")

#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

# Force Zlib names to be mangled to ensure
# they do not conflict with other packages
# such as QT

option(DO_ZLIB_MANGLE "Mangle Zlib names" ON)
if (DO_ZLIB_MANGLE)
  add_definitions(-DZ_PREFIX)
endif()

#
# 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_DLL_SRCS
        win32/zlib1.rc # If present will override custom build rule below.
    )
endif()

if(CMAKE_COMPILER_IS_GNUCC)
    if(ASM686)
        set(ZLIB_ASMS contrib/asm686/match.S)
    elseif (AMD64)
        set(ZLIB_ASMS contrib/amd64/amd64-match.S)
    endif ()

	if(ZLIB_ASMS)
		add_definitions(-DASMV)
		set_source_files_properties(${ZLIB_ASMS} PROPERTIES LANGUAGE C COMPILE_FLAGS -DNO_UNDERLINE)
	endif()
endif()

if(MSVC)
    if(ASM686)
		ENABLE_LANGUAGE(ASM_MASM)
        set(ZLIB_ASMS
			contrib/masmx86/inffas32.asm
			contrib/masmx86/match686.asm
		)
    elseif (AMD64)
		ENABLE_LANGUAGE(ASM_MASM)
        set(ZLIB_ASMS
			contrib/masmx64/gvmat64.asm
			contrib/masmx64/inffasx64.asm
		)
    endif()

	if(ZLIB_ASMS)
		add_definitions(-DASMV -DASMINF)
	endif()
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_DLL_SRCS ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
endif(MINGW)

#add_library(zlib SHARED ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_DLL_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
#add_library(zlibstatic STATIC ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
#set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
#set_target_properties(zlib PROPERTIES SOVERSION 1)

# force static build
add_library(${SCI_ZLIB_LIBRARY} ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})

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-${ZLIB_FULL_VERSION}.dll to be created when cygz.dll
    # seems to be the default.
    #
    # This has no effect with MSVC, on that platform the version info for
    # the DLL comes from the resource file win32/zlib1.rc
    set_target_properties(${SCI_ZLIB_LIBRARY} 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(${SCI_ZLIB_LIBRARY} PROPERTIES OUTPUT_NAME z)
   if(NOT APPLE)
     set_target_properties(${SCI_ZLIB_LIBRARY} PROPERTIES LINK_FLAGS "-Wl,--version-script,\"${CMAKE_CURRENT_SOURCE_DIR}/zlib.map\"")
   endif()
#elseif(BUILD_SHARED_LIBS AND WIN32)
#    # Creates zlib1.dll when building shared library version
#    set_target_properties(zlib PROPERTIES SUFFIX "1.dll")
endif()

set(SCI_ZLIB_LIBRARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
set(ZLIB_USE_FILE "${CMAKE_CURRENT_SOURCE_DIR}/UseZlib.cmake")

configure_file(ZlibConfig.cmake.in "${CMAKE_CURRENT_BINARY_DIR}/ZlibConfig.cmake" @ONLY)
export(TARGETS ${SCI_ZLIB_LIBRARY} FILE ZlibExports.cmake)

#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()