CMakeLists.txt

   1 # CMakeLists.txt
   2
   3 # Copyright (C) 2007-2014 Glenn Randers-Pehrson
   4
   5 # This code is released under the libpng license.
   6 # For conditions of distribution and use, see the disclaimer
   7 # and license in png.h
   8
   9 cmake_minimum_required(VERSION 2.4.4)
  10 set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
  11
  12 set(CMAKE_CONFIGURATION_TYPES "Release;Debug;MinSizeRel;RelWithDebInfo")
  13
  14 project(libpng C)
  15 enable_testing()
  16
  17 set(PNGLIB_MAJOR 1)
  18 set(PNGLIB_MINOR 6)
  19 set(PNGLIB_RELEASE 13)
  20 set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
  21 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
  22
  23 # needed packages
  24 find_package(ZLIB REQUIRED)
  25 include_directories(${ZLIB_INCLUDE_DIR})
  26
  27 if(NOT WIN32)
  28   find_library(M_LIBRARY
  29     NAMES m
  30     PATHS /usr/lib /usr/local/lib
  31   )
  32   if(NOT M_LIBRARY)
  33     message(STATUS
  34       "math library 'libm' not found - floating point support disabled")
  35   endif()
  36 else()
  37   # not needed on windows
  38   set(M_LIBRARY "")
  39 endif()
  40
  41 # COMMAND LINE OPTIONS
  42 if(DEFINED PNG_SHARED)
  43   option(PNG_SHARED "Build shared lib" ${PNG_SHARED})
  44 else()
  45   option(PNG_SHARED "Build shared lib" ON)
  46 endif()
  47 if(DEFINED PNG_STATIC)
  48   option(PNG_STATIC "Build static lib" ${PNG_STATIC})
  49 else()
  50   option(PNG_STATIC "Build static lib" ON)
  51 endif()
  52
  53 option(PNG_TESTS  "Build libpng tests" YES)
  54
  55 # Many more configuration options could be added here
  56 option(PNG_DEBUG         "Build with debug output" NO)
  57 option(PNGARG            "Disable ANSI-C prototypes" NO)
  58
  59 # SET LIBNAME
  60 set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR})
  61
  62 # to distinguish between debug and release lib
  63 set(CMAKE_DEBUG_POSTFIX "d")
  64
  65 # Use the prebuilt pnglibconf.h file from the scripts folder
  66 # TODO: fix this by building with awk; without this no cmake build can be
  67 # configured directly (to do so indirectly use your local awk to build a
  68 # pnglibconf.h in the build directory.)
  69 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt
  70                ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h)
  71 include_directories(${CMAKE_CURRENT_BINARY_DIR})
  72
  73 # OUR SOURCES
  74 set(libpng_public_hdrs
  75   png.h
  76   pngconf.h
  77   ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h
  78 )
  79 set(libpng_sources
  80   ${libpng_public_hdrs}
  81   pngdebug.h
  82   pnginfo.h
  83   pngpriv.h
  84   pngstruct.h
  85   png.c
  86   pngerror.c
  87   pngget.c
  88   pngmem.c
  89   pngpread.c
  90   pngread.c
  91   pngrio.c
  92   pngrtran.c
  93   pngrutil.c
  94   pngset.c
  95   pngtrans.c
  96   pngwio.c
  97   pngwrite.c
  98   pngwtran.c
  99   pngwutil.c
 100 )
 101 set(pngtest_sources
 102   pngtest.c
 103 )
 104 set(pngvalid_sources
 105   contrib/libtests/pngvalid.c
 106 )
 107 set(pngstest_sources
 108   contrib/libtests/pngstest.c
 109 )
 110 # SOME NEEDED DEFINITIONS
 111
 112 if(MSVC)
 113   add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
 114 endif(MSVC)
 115
 116 if(PNG_DEBUG)
 117   add_definitions(-DPNG_DEBUG)
 118 endif()
 119
 120 # NOW BUILD OUR TARGET
 121 include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIR})
 122
 123 unset(PNG_LIB_TARGETS)
 124
 125 if(PNG_SHARED)
 126   add_library(${PNG_LIB_NAME} SHARED ${libpng_sources})
 127   set(PNG_LIB_TARGETS ${PNG_LIB_NAME})
 128   if(MSVC)
 129     # msvc does not append 'lib' - do it here to have consistent name
 130     set_target_properties(${PNG_LIB_NAME} PROPERTIES PREFIX "lib")
 131     set_target_properties(${PNG_LIB_NAME} PROPERTIES IMPORT_PREFIX "lib")
 132   endif()
 133   target_link_libraries(${PNG_LIB_NAME} ${ZLIB_LIBRARY} ${M_LIBRARY})
 134 endif()
 135
 136 if(PNG_STATIC)
 137 # does not work without changing name
 138   set(PNG_LIB_NAME_STATIC ${PNG_LIB_NAME}_static)
 139   add_library(${PNG_LIB_NAME_STATIC} STATIC ${libpng_sources})
 140   list(APPEND PNG_LIB_TARGETS ${PNG_LIB_NAME_STATIC})
 141   if(MSVC)
 142     # msvc does not append 'lib' - do it here to have consistent name
 143     set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES PREFIX "lib")
 144   endif()
 145   target_link_libraries(${PNG_LIB_NAME_STATIC} ${ZLIB_LIBRARY} ${M_LIBRARY})
 146 endif()
 147
 148 if(NOT PNG_LIB_TARGETS)
 149   message(SEND_ERROR
 150     "No library variant selected to build. "
 151     "Please enable at least one of the following options: PNG_STATIC, PNG_SHARED")
 152 endif()
 153
 154 if(PNG_SHARED AND WIN32)
 155   set_target_properties(${PNG_LIB_NAME} PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL)
 156 endif()
 157
 158 if(PNG_TESTS AND PNG_SHARED)
 159   # does not work with msvc due to png_lib_ver issue
 160   add_executable(pngtest ${pngtest_sources})
 161   target_link_libraries(pngtest ${PNG_LIB_NAME})
 162   add_test(pngtest ./pngtest ${CMAKE_CURRENT_SOURCE_DIR}/pngtest.png)
 163   #
 164   add_executable(pngvalid ${pngvalid_sources})
 165   target_link_libraries(pngvalid ${PNG_LIB_NAME})
 166   add_test(pngvalid ./pngvalid)
 167   add_executable(pngstest ${pngstest_sources})
 168   target_link_libraries(pngstest ${PNG_LIB_NAME})
 169   add_test(pngstest ./pngstest
 170     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g01.png
 171     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g02.png
 172     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g04.png
 173     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g08.png
 174     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g16.png
 175     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn2c08.png
 176     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn2c16.png
 177     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p01.png
 178     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p02.png
 179     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p04.png
 180     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p08.png
 181     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn4a08.png
 182     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn4a16.png
 183     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn6a08.png
 184     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn6a16.png
 185     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn0g01.png
 186     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn0g02.png
 187     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn0g04.png
 188     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn2c16.png
 189     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn3p08.png
 190     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbgn2c16.png
 191     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbgn3p08.png
 192     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbrn2c08.png
 193     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbwn0g16.png
 194     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbwn3p08.png
 195     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbyn3p08.png
 196     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp0n0g08.png
 197     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp0n2c08.png
 198     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp0n3p08.png
 199     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp1n3p08.png
 200   )
 201 endif()
 202
 203 # Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set
 204 IF(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
 205   SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY "lib")
 206 ENDIF(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
 207
 208 # Set a variable with CMake code which:
 209 # Creates a symlink from src to dest (if possible) or alternatively
 210 # copies if different.
 211 macro(CREATE_SYMLINK SRC_FILE DEST_FILE)
 212   FILE(REMOVE ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
 213   if(WIN32 AND NOT CYGWIN AND NOT MSYS)
 214     ADD_CUSTOM_COMMAND(
 215         OUTPUT ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}   ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE}
 216         COMMAND ${CMAKE_COMMAND} -E copy_if_different  "${SRC_FILE}" ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}
 217         COMMAND ${CMAKE_COMMAND} -E copy_if_different  "${SRC_FILE}" ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE}
 218         DEPENDS ${PNG_LIB_TARGETS}
 219         )
 220     ADD_CUSTOM_TARGET(${DEST_FILE}_COPY ALL DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
 221   else(WIN32 AND NOT CYGWIN AND NOT MSYS)
 222     get_filename_component(LINK_TARGET "${SRC_FILE}" NAME)
 223     execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_LIBRARY_OUTPUT_DIRECTORY})
 224     execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 225     execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 226   endif(WIN32 AND NOT CYGWIN AND NOT MSYS)
 227 endmacro()
 228
 229 # libpng is a library so default to 'lib'
 230 if(NOT DEFINED CMAKE_INSTALL_LIBDIR)
 231   set(CMAKE_INSTALL_LIBDIR lib)
 232 endif(NOT DEFINED CMAKE_INSTALL_LIBDIR)
 233
 234 # CREATE PKGCONFIG FILES
 235 # we use the same files like ./configure, so we have to set its vars
 236 # Only do this on Windows for Cygwin - the files don't make much sense outside
 237 # a UNIX look alike
 238 if(NOT WIN32 OR CYGWIN OR MINGW)
 239   set(prefix      ${CMAKE_INSTALL_PREFIX})
 240   set(exec_prefix ${CMAKE_INSTALL_PREFIX})
 241   set(libdir      ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
 242   set(includedir  ${CMAKE_INSTALL_PREFIX}/include)
 243   set(LIBS        "-lz -lm")
 244   configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng.pc.in
 245     ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc @ONLY)
 246   CREATE_SYMLINK(${PNGLIB_NAME}.pc libpng.pc)
 247
 248   configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng-config.in
 249     ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config @ONLY)
 250   CREATE_SYMLINK(${PNGLIB_NAME}-config libpng-config)
 251 endif(NOT WIN32 OR CYGWIN OR MINGW)
 252
 253 # SET UP LINKS
 254 if(PNG_SHARED)
 255   set_target_properties(${PNG_LIB_NAME} PROPERTIES
 256 #   VERSION 16.${PNGLIB_RELEASE}.1.6.13
 257     VERSION 16.${PNGLIB_RELEASE}.0
 258     SOVERSION 16
 259     CLEAN_DIRECT_OUTPUT 1)
 260 endif()
 261 if(PNG_STATIC)
 262   # MSVC doesn't use a different file extension for shared vs. static
 263   # libs.  We are able to change OUTPUT_NAME to remove the _static
 264   # for all other platforms.
 265   if(NOT MSVC)
 266     set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES
 267       OUTPUT_NAME ${PNG_LIB_NAME}
 268       CLEAN_DIRECT_OUTPUT 1)
 269   endif()
 270 endif()
 271
 272 # If CMake > 2.4.x, we set a variable used below to export
 273 # targets to an export file.
 274 # TODO: Use VERSION_GREATER after our cmake_minimum_required >= 2.6.2
 275 if(CMAKE_MAJOR_VERSION GREATER 1 AND CMAKE_MINOR_VERSION GREATER 4)
 276   set(PNG_EXPORT_RULE EXPORT libpng)
 277 elseif(CMAKE_MAJOR_VERSION GREATER 2) # future proof
 278   set(PNG_EXPORT_RULE EXPORT libpng)
 279 endif()
 280
 281 # INSTALL
 282 if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
 283   install(TARGETS ${PNG_LIB_TARGETS}
 284       ${PNG_EXPORT_RULE}
 285       RUNTIME DESTINATION bin
 286       LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
 287       ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
 288
 289   if(PNG_SHARED)
 290     # Create a symlink for libpng.dll.a => libpng16.dll.a on Cygwin
 291     if(CYGWIN OR MINGW)
 292        get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE})
 293        CREATE_SYMLINK(${BUILD_TARGET_LOCATION} libpng${CMAKE_IMPORT_LIBRARY_SUFFIX})
 294        install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_IMPORT_LIBRARY_SUFFIX}
 295          DESTINATION ${CMAKE_INSTALL_LIBDIR})
 296     endif(CYGWIN OR MINGW)
 297
 298     if(NOT WIN32)
 299       get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE})
 300       CREATE_SYMLINK(${BUILD_TARGET_LOCATION} libpng${CMAKE_SHARED_LIBRARY_SUFFIX})
 301       install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_SHARED_LIBRARY_SUFFIX}
 302          DESTINATION ${CMAKE_INSTALL_LIBDIR})
 303     endif(NOT WIN32)
 304   endif(PNG_SHARED)
 305
 306   if(PNG_STATIC)
 307     if(NOT WIN32 OR CYGWIN OR MINGW)
 308       get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME_STATIC} LOCATION_${CMAKE_BUILD_TYPE})
 309       CREATE_SYMLINK(${BUILD_TARGET_LOCATION} libpng${CMAKE_STATIC_LIBRARY_SUFFIX})
 310       install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_STATIC_LIBRARY_SUFFIX}
 311          DESTINATION ${CMAKE_INSTALL_LIBDIR})
 312     endif(NOT WIN32 OR CYGWIN OR MINGW)
 313  endif()
 314 endif()
 315
 316 if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )
 317   install(FILES ${libpng_public_hdrs}   DESTINATION include)
 318   install(FILES ${libpng_public_hdrs}   DESTINATION include/${PNGLIB_NAME})
 319 endif()
 320 if(NOT SKIP_INSTALL_EXECUTABLES AND NOT SKIP_INSTALL_ALL )
 321   if(NOT WIN32 OR CYGWIN OR MINGW)
 322     install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config DESTINATION bin)
 323     install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
 324             DESTINATION bin)
 325   endif(NOT WIN32 OR CYGWIN OR MINGW)
 326 endif()
 327
 328 if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
 329   # Install man pages
 330   if(NOT PNG_MAN_DIR)
 331     set(PNG_MAN_DIR "share/man")
 332   endif()
 333   install(FILES libpng.3 libpngpf.3      DESTINATION ${PNG_MAN_DIR}/man3)
 334   install(FILES png.5                    DESTINATION ${PNG_MAN_DIR}/man5)
 335   # Install pkg-config files
 336   if(NOT WIN32 OR CYGWIN OR MINGW)
 337     install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng.pc
 338             DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 339     install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config
 340             DESTINATION bin)
 341     install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc
 342             DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 343     install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
 344             DESTINATION bin)
 345   endif(NOT WIN32 OR CYGWIN OR MINGW)
 346 endif()
 347
 348 # On versions of CMake that support it, create an export file CMake
 349 # users can include() to import our targets
 350 if(PNG_EXPORT_RULE AND NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL )
 351   install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake)
 352 endif()
 353
 354 # what's with libpng-manual.txt and all the extra files?
 355
 356 # UNINSTALL
 357 # do we need this?
 358
 359 # DIST
 360 # do we need this?
 361
 362 # to create msvc import lib for mingw compiled shared lib
 363 # pexports libpng.dll > libpng.def
 364 # lib /def:libpng.def /machine:x86
 365