cmake_minimum_required(VERSION 2.4.4) set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true) if(UNIX AND NOT DEFINED CMAKE_BUILD_TYPE) if(CMAKE_MAJOR_VERSION EQUAL 2 AND CMAKE_MINOR_VERSION EQUAL 4) # workaround CMake 2.4.x bug set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.") else() set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.") endif() endif() project(libpng C) enable_testing() # Copyright (C) 2007-2011 Glenn Randers-Pehrson # This code is released under the libpng license. # For conditions of distribution and use, see the disclaimer # and license in png.h set(PNGLIB_MAJOR 1) set(PNGLIB_MINOR 5) set(PNGLIB_RELEASE 1) set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR}) set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE}) if(NOT WIN32) find_library(M_LIBRARY NAMES m PATHS /usr/lib /usr/local/lib ) if(NOT M_LIBRARY) message(STATUS "math library 'libm' not found - floating point support disabled") endif() else() # not needed on windows set(M_LIBRARY "") endif() # COMMAND LINE OPTIONS if(DEFINED PNG_SHARED) option(PNG_SHARED "Build shared lib" ${PNG_SHARED}) else() option(PNG_SHARED "Build shared lib" ON) endif() if(DEFINED PNG_STATIC) option(PNG_STATIC "Build static lib" ${PNG_STATIC}) else() option(PNG_STATIC "Build static lib" ON) endif() if(MINGW) option(PNG_TESTS "Build pngtest" NO) else() option(PNG_TESTS "Build pngtest" YES) endif() option(PNG_NO_CONSOLE_IO "FIXME" YES) option(PNG_NO_STDIO "FIXME" YES) option(PNG_DEBUG "Build with debug output" NO) option(PNGARG "FIXME" YES) #TODO: # PNG_CONSOLE_IO_SUPPORTED # maybe needs improving, but currently I don't know when we can enable what :) set(png_asm_tmp "OFF") if(NOT WIN32) find_program(uname_executable NAMES uname PATHS /bin /usr/bin /usr/local/bin) if(uname_executable) exec_program(${uname_executable} ARGS --machine OUTPUT_VARIABLE uname_output) if("uname_output" MATCHES "^.*i[1-9]86.*$") set(png_asm_tmp "ON") else("uname_output" MATCHES "^.*i[1-9]86.*$") set(png_asm_tmp "OFF") endif("uname_output" MATCHES "^.*i[1-9]86.*$") endif(uname_executable) else() # this env var is normally only set on win64 set(TEXT "ProgramFiles(x86)") if("$ENV{${TEXT}}" STREQUAL "") set(png_asm_tmp "ON") endif("$ENV{${TEXT}}" STREQUAL "") endif() # SET LIBNAME set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR}) # to distinguish between debug and release lib set(CMAKE_DEBUG_POSTFIX "d") # Use the prebuilt pnglibconf.h file from the scripts folder configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h) include_directories(${CMAKE_CURRENT_BINARY_DIR}) # OUR SOURCES set(libpng_public_hdrs png.h pngconf.h ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h ) set(libpng_sources ${libpng_public_hdrs} pngdebug.h pnginfo.h pngpriv.h pngstruct.h png.c pngerror.c pngget.c pngmem.c pngpread.c pngread.c pngrio.c pngrtran.c pngrutil.c pngset.c pngtrans.c pngwio.c pngwrite.c pngwtran.c pngwutil.c ) set(pngtest_sources pngtest.c ) # SOME NEEDED DEFINITIONS add_definitions(-DPNG_CONFIGURE_LIBPNG) if(_AIX) add_definitions(-D_ALL_SOURCE) endif(_AIX) if(MSVC) add_definitions(-DPNG_NO_MODULEDEF -D_CRT_SECURE_NO_DEPRECATE) endif(MSVC) if(PNG_SHARED OR NOT MSVC) #if building msvc static this has NOT to be defined add_definitions(-DZLIB_DLL) endif() if(PNG_CONSOLE_IO_SUPPORTED) add_definitions(-DPNG_CONSOLE_IO_SUPPORTED) endif() if(PNG_NO_CONSOLE_IO) add_definitions(-DPNG_NO_CONSOLE_IO) endif() if(PNG_NO_STDIO) add_definitions(-DPNG_NO_STDIO) endif() if(PNG_DEBUG) add_definitions(-DPNG_DEBUG) endif() if(NOT M_LIBRARY AND NOT WIN32) add_definitions(-DPNG_NO_FLOATING_POINT_SUPPORTED) endif() # NOW BUILD OUR TARGET include_directories(${CMAKE_CURRENT_SOURCE_DIR}) if(PNG_SHARED) add_library(${PNG_LIB_NAME} SHARED ${libpng_sources}) if(MSVC) # msvc does not append 'lib' - do it here to have consistent name set_target_properties(${PNG_LIB_NAME} PROPERTIES PREFIX "lib") set_target_properties(${PNG_LIB_NAME} PROPERTIES IMPORT_PREFIX "lib") endif() target_link_libraries(${PNG_LIB_NAME} Zlib::zlib ${M_LIBRARY}) target_include_directories(${PNG_LIB_NAME} PUBLIC . ${CMAKE_CURRENT_BINARY_DIR}) add_library(Png::png ALIAS ${PNG_LIB_NAME}) endif() if(PNG_STATIC) # does not work without changing name set(PNG_LIB_NAME_STATIC ${PNG_LIB_NAME}_static) add_library(${PNG_LIB_NAME_STATIC} STATIC ${libpng_sources}) if(MSVC) # msvc does not append 'lib' - do it here to have consistent name set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES PREFIX "lib") endif() target_link_libraries(${PNG_LIB_NAME_STATIC} Zlib::zlib ${M_LIBRARY}) target_include_directories(${PNG_LIB_NAME_STATIC} PUBLIC . ${CMAKE_CURRENT_BINARY_DIR}) add_library(Png::pngstatic ALIAS ${PNG_LIB_NAME}_static) endif() if(PNG_SHARED AND WIN32) set_target_properties(${PNG_LIB_NAME} PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL) endif() if(PNG_TESTS AND PNG_SHARED) # does not work with msvc due to png_lib_ver issue add_executable(pngtest ${pngtest_sources}) target_link_libraries(pngtest ${PNG_LIB_NAME}) add_test(pngtest ./pngtest ${CMAKE_CURRENT_SOURCE_DIR}/pngtest.png) endif() # # Set a variable with CMake code which: # Creates a symlink from src to dest (if possible) or alternatively # copies if different. macro(_png_generate_symlink_code CODE SRC DEST) if(WIN32 AND NOT CYGWIN) set(_png_gsc_message "Copying ${SRC} to ${DEST} if needed") set(_png_gsc_operation "copy_if_different") else() set(_png_gsc_message "Symlinking ${SRC} to ${DEST}") set(_png_gsc_operation "create_symlink") endif() set(${CODE} " message(STATUS \"${_png_gsc_message}\") execute_process(COMMAND \${CMAKE_COMMAND} -E ${_png_gsc_operation} \"${SRC}\" \"${DEST}\") ") endmacro() # CREATE PKGCONFIG FILES # we use the same files like ./configure, so we have to set its vars if(NOT DEFINED CMAKE_INSTALL_LIBDIR) set(CMAKE_INSTALL_LIBDIR lib) endif(NOT DEFINED CMAKE_INSTALL_LIBDIR) set(prefix ${CMAKE_INSTALL_PREFIX}) set(exec_prefix ${CMAKE_INSTALL_PREFIX}) set(libdir ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}) set(includedir ${CMAKE_INSTALL_PREFIX}/include) set(LIBS "-lz -lm") configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng.pc.in ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc @ONLY) _png_generate_symlink_code(PNG_PC_INSTALL_CODE ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc ${CMAKE_CURRENT_BINARY_DIR}/libpng.pc) configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng-config.in ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config @ONLY) _png_generate_symlink_code(PNG_CONFIG_INSTALL_CODE ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config ${CMAKE_CURRENT_BINARY_DIR}/libpng-config) # SET UP LINKS if(PNG_SHARED) set_target_properties(${PNG_LIB_NAME} PROPERTIES # VERSION 15.${PNGLIB_RELEASE}.1.5.1 VERSION 15.${PNGLIB_RELEASE}.0 SOVERSION 15 CLEAN_DIRECT_OUTPUT 1) endif() if(PNG_STATIC) # MSVC doesn't use a different file extension for shared vs. static # libs. We are able to change OUTPUT_NAME to remove the _static # for all other platforms. if(NOT MSVC) set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES OUTPUT_NAME ${PNG_LIB_NAME} CLEAN_DIRECT_OUTPUT 1) endif() endif() # If CMake > 2.4.x, we set a variable used below to export # targets to an export file. # TODO: Use VERSION_GREATER after our cmake_minimum_required >= 2.6.2 if(CMAKE_MAJOR_VERSION GREATER 1 AND CMAKE_MINOR_VERSION GREATER 4) set(PNG_EXPORT_RULE EXPORT libpng) elseif(CMAKE_MAJOR_VERSION GREATER 2) # future proof set(PNG_EXPORT_RULE EXPORT libpng) endif() # what's with libpng-$VER%.txt and all the extra files? # UNINSTALL # do we need this? # DIST # do we need this? # to create msvc import lib for mingw compiled shared lib # pexports libpng.dll > libpng.def # lib /def:libpng.def /machine:x86