344 lines
11 KiB
CMake
344 lines
11 KiB
CMake
# CMakeLists.txt
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# Copyright (C) 2007-2011 Glenn Randers-Pehrson
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# This code is released under the libpng license.
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# For conditions of distribution and use, see the disclaimer
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# and license in png.h
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cmake_minimum_required(VERSION 2.4.4)
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set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
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if(UNIX AND NOT DEFINED CMAKE_BUILD_TYPE)
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if(CMAKE_MAJOR_VERSION EQUAL 2 AND CMAKE_MINOR_VERSION EQUAL 4)
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# workaround CMake 2.4.x bug
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set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING
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"Choose the type of build, options are:
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None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used)
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Debug
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Release
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RelWithDebInfo
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MinSizeRel.")
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else()
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set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING
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"Choose the type of build, options are:
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None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used)
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Debug
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Release
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RelWithDebInfo
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MinSizeRel.")
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endif()
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endif()
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project(libpng C)
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enable_testing()
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set(PNGLIB_MAJOR 1)
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set(PNGLIB_MINOR 5)
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set(PNGLIB_RELEASE 6)
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set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
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set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
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# needed packages
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find_package(ZLIB REQUIRED)
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include_directories(${ZLIB_INCLUDE_DIR})
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if(NOT WIN32)
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find_library(M_LIBRARY
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NAMES m
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PATHS /usr/lib /usr/local/lib
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)
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if(NOT M_LIBRARY)
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message(STATUS
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"math library 'libm' not found - floating point support disabled")
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endif()
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else()
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# not needed on windows
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set(M_LIBRARY "")
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endif()
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# COMMAND LINE OPTIONS
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if(DEFINED PNG_SHARED)
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option(PNG_SHARED "Build shared lib" ${PNG_SHARED})
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else()
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option(PNG_SHARED "Build shared lib" ON)
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endif()
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if(DEFINED PNG_STATIC)
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option(PNG_STATIC "Build static lib" ${PNG_STATIC})
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else()
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option(PNG_STATIC "Build static lib" ON)
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endif()
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option(PNG_TESTS "Build libpng tests" YES)
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# Many more configuration options could be added here
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option(PNG_DEBUG "Build with debug output" NO)
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option(PNGARG "Disable ANSI-C prototypes" NO)
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# SET LIBNAME
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set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR})
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# to distinguish between debug and release lib
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set(CMAKE_DEBUG_POSTFIX "d")
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# Use the prebuilt pnglibconf.h file from the scripts folder
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# TODO: fix this by building with awk; without this no cmake build can be
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# configured directly (to do so indirectly use your local awk to build a
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# pnglibconf.h in the build directory.)
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configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt
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${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h)
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include_directories(${CMAKE_CURRENT_BINARY_DIR})
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# OUR SOURCES
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set(libpng_public_hdrs
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png.h
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pngconf.h
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${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h
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)
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set(libpng_sources
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${libpng_public_hdrs}
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pngdebug.h
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pnginfo.h
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pngpriv.h
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pngstruct.h
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png.c
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pngerror.c
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pngget.c
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pngmem.c
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pngpread.c
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pngread.c
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pngrio.c
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pngrtran.c
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pngrutil.c
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pngset.c
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pngtrans.c
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pngwio.c
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pngwrite.c
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pngwtran.c
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pngwutil.c
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)
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set(pngtest_sources
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pngtest.c
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)
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set(pngvalid_sources
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pngvalid.c
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)
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# SOME NEEDED DEFINITIONS
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add_definitions(-DPNG_CONFIGURE_LIBPNG)
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if(MSVC)
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add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
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endif(MSVC)
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if(PNG_DEBUG)
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add_definitions(-DPNG_DEBUG)
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endif()
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# NOW BUILD OUR TARGET
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include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIR})
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if(PNG_SHARED)
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add_library(${PNG_LIB_NAME} SHARED ${libpng_sources})
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if(MSVC)
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# msvc does not append 'lib' - do it here to have consistent name
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set_target_properties(${PNG_LIB_NAME} PROPERTIES PREFIX "lib")
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set_target_properties(${PNG_LIB_NAME} PROPERTIES IMPORT_PREFIX "lib")
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endif()
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target_link_libraries(${PNG_LIB_NAME} ${ZLIB_LIBRARY} ${M_LIBRARY})
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endif()
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if(PNG_STATIC)
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# does not work without changing name
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set(PNG_LIB_NAME_STATIC ${PNG_LIB_NAME}_static)
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add_library(${PNG_LIB_NAME_STATIC} STATIC ${libpng_sources})
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if(MSVC)
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# msvc does not append 'lib' - do it here to have consistent name
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set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES PREFIX "lib")
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endif()
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target_link_libraries(${PNG_LIB_NAME_STATIC} ${ZLIB_LIBRARY} ${M_LIBRARY})
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endif()
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if(PNG_SHARED AND WIN32)
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set_target_properties(${PNG_LIB_NAME} PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL)
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endif()
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if(PNG_TESTS AND PNG_SHARED)
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# does not work with msvc due to png_lib_ver issue
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add_executable(pngtest ${pngtest_sources})
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target_link_libraries(pngtest ${PNG_LIB_NAME})
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add_test(pngtest ./pngtest ${CMAKE_CURRENT_SOURCE_DIR}/pngtest.png)
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#
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add_executable(pngvalid ${pngvalid_sources})
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target_link_libraries(pngvalid ${PNG_LIB_NAME})
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add_test(pngvalid ./pngvalid)
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endif()
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# Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set
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IF(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
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IF(WIN32)
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SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY "bin")
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ELSE(WIN32)
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SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY "lib")
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ENDIF(WIN32)
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ENDIF(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
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# Set a variable with CMake code which:
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# Creates a symlink from src to dest (if possible) or alternatively
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# copies if different.
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macro(CREATE_SYMLINK SRC_FILE DEST_FILE)
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FILE(REMOVE ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
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if(WIN32 AND NOT CYGWIN)
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ADD_CUSTOM_COMMAND(
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OUTPUT ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE}
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COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/${SRC_FILE} ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}
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COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/${SRC_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE}
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DEPENDS ${PNG_LIB_NAME} ${PNG_LIB_NAME_STATIC}
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)
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ADD_CUSTOM_TARGET(${DEST_FILE}_COPY ALL DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
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else(WIN32 AND NOT CYGWIN)
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execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${SRC_FILE} ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
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execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${SRC_FILE} ${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
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endif(WIN32 AND NOT CYGWIN)
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endmacro()
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# libpng is a library so default to 'lib'
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if(NOT DEFINED CMAKE_INSTALL_LIBDIR)
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set(CMAKE_INSTALL_LIBDIR lib)
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endif(NOT DEFINED CMAKE_INSTALL_LIBDIR)
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# CREATE PKGCONFIG FILES
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# we use the same files like ./configure, so we have to set its vars
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# Only do this on Windows for Cygwin - the files don't make much sense outside
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# a UNIX look alike
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if(NOT WIN32 OR CYGWIN)
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set(prefix ${CMAKE_INSTALL_PREFIX})
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set(exec_prefix ${CMAKE_INSTALL_PREFIX})
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set(libdir ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
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set(includedir ${CMAKE_INSTALL_PREFIX}/include)
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set(LIBS "-lz -lm")
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configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng.pc.in
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${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc @ONLY)
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CREATE_SYMLINK(${PNGLIB_NAME}.pc libpng.pc)
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configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng-config.in
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${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config @ONLY)
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CREATE_SYMLINK(${PNGLIB_NAME}-config libpng-config)
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endif(NOT WIN32 OR CYGWIN)
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# SET UP LINKS
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if(PNG_SHARED)
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set_target_properties(${PNG_LIB_NAME} PROPERTIES
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# VERSION 15.${PNGLIB_RELEASE}.1.5.6beta08
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VERSION 15.${PNGLIB_RELEASE}.0
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SOVERSION 15
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CLEAN_DIRECT_OUTPUT 1)
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endif()
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if(PNG_STATIC)
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# MSVC doesn't use a different file extension for shared vs. static
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# libs. We are able to change OUTPUT_NAME to remove the _static
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# for all other platforms.
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if(NOT MSVC)
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set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES
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OUTPUT_NAME ${PNG_LIB_NAME}
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CLEAN_DIRECT_OUTPUT 1)
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endif()
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endif()
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# If CMake > 2.4.x, we set a variable used below to export
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# targets to an export file.
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# TODO: Use VERSION_GREATER after our cmake_minimum_required >= 2.6.2
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if(CMAKE_MAJOR_VERSION GREATER 1 AND CMAKE_MINOR_VERSION GREATER 4)
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set(PNG_EXPORT_RULE EXPORT libpng)
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elseif(CMAKE_MAJOR_VERSION GREATER 2) # future proof
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set(PNG_EXPORT_RULE EXPORT libpng)
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endif()
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# INSTALL
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if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
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if(PNG_SHARED)
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install(TARGETS ${PNG_LIB_NAME}
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${PNG_EXPORT_RULE}
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RUNTIME DESTINATION bin
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LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
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ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
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# Create a symlink for libpng.dll.a => libpng15.dll.a on Cygwin
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if(CYGWIN)
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get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE})
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get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME)
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CREATE_SYMLINK(${BUILD_TARGET_FILE} libpng${CMAKE_IMPORT_LIBRARY_SUFFIX})
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install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_IMPORT_LIBRARY_SUFFIX}
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DESTINATION ${CMAKE_INSTALL_LIBDIR})
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endif(CYGWIN)
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if(NOT WIN32)
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get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE})
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get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME)
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CREATE_SYMLINK(${BUILD_TARGET_FILE} libpng${CMAKE_SHARED_LIBRARY_SUFFIX})
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install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_SHARED_LIBRARY_SUFFIX}
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DESTINATION ${CMAKE_INSTALL_LIBDIR})
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endif(NOT WIN32)
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endif(PNG_SHARED)
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if(PNG_STATIC)
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install(TARGETS ${PNG_LIB_NAME_STATIC}
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${PNG_EXPORT_RULE}
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LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
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ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
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if(NOT WIN32 OR CYGWIN)
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get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME_STATIC} LOCATION_${CMAKE_BUILD_TYPE})
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get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME)
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CREATE_SYMLINK(${BUILD_TARGET_FILE} libpng${CMAKE_STATIC_LIBRARY_SUFFIX})
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install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_STATIC_LIBRARY_SUFFIX}
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DESTINATION ${CMAKE_INSTALL_LIBDIR})
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endif(NOT WIN32 OR CYGWIN)
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endif()
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endif()
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if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )
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install(FILES ${libpng_public_hdrs} DESTINATION include)
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install(FILES ${libpng_public_hdrs} DESTINATION include/${PNGLIB_NAME})
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endif()
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if(NOT SKIP_INSTALL_EXECUTABLES AND NOT SKIP_INSTALL_ALL )
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install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config DESTINATION bin)
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install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
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DESTINATION bin)
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endif()
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if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
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# Install man pages
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if(NOT PNG_MAN_DIR)
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set(PNG_MAN_DIR "share/man")
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endif()
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install(FILES libpng.3 libpngpf.3 DESTINATION ${PNG_MAN_DIR}/man3)
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install(FILES png.5 DESTINATION ${PNG_MAN_DIR}/man5)
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# Install pkg-config files
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install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng.pc
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DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
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install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config
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DESTINATION bin)
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install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc
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DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
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install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
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DESTINATION bin)
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endif()
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# On versions of CMake that support it, create an export file CMake
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# users can include() to import our targets
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if(PNG_EXPORT_RULE AND NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL )
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install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake)
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endif()
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# what's with libpng-$VER%.txt and all the extra files?
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# UNINSTALL
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# do we need this?
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# DIST
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# do we need this?
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# to create msvc import lib for mingw compiled shared lib
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# pexports libpng.dll > libpng.def
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# lib /def:libpng.def /machine:x86
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