src/SDL2/external/libpng-1.6.2/CMakeLists.txt

   1 # CMakeLists.txt
   2
   3 # Copyright (C) 2007-2011 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 if(UNIX AND NOT DEFINED CMAKE_BUILD_TYPE)
  13   if(CMAKE_MAJOR_VERSION EQUAL 2 AND CMAKE_MINOR_VERSION EQUAL 4)
  14     # workaround CMake 2.4.x bug
  15     set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING
  16         "Choose the type of build, options are:
  17            None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used)
  18            Debug
  19            Release
  20            RelWithDebInfo
  21            MinSizeRel.")
  22   else()
  23     set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING
  24         "Choose the type of build, options are:
  25            None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used)
  26            Debug
  27            Release
  28            RelWithDebInfo
  29            MinSizeRel.")
  30   endif()
  31 endif()
  32
  33 project(libpng C)
  34 enable_testing()
  35
  36 set(PNGLIB_MAJOR 1)
  37 set(PNGLIB_MINOR 6)
  38 set(PNGLIB_RELEASE 2)
  39 set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
  40 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
  41
  42 # needed packages
  43 find_package(ZLIB REQUIRED)
  44 include_directories(${ZLIB_INCLUDE_DIR})
  45
  46 if(NOT WIN32)
  47   find_library(M_LIBRARY
  48     NAMES m
  49     PATHS /usr/lib /usr/local/lib
  50   )
  51   if(NOT M_LIBRARY)
  52     message(STATUS
  53       "math library 'libm' not found - floating point support disabled")
  54   endif()
  55 else()
  56   # not needed on windows
  57   set(M_LIBRARY "")
  58 endif()
  59
  60 # COMMAND LINE OPTIONS
  61 if(DEFINED PNG_SHARED)
  62   option(PNG_SHARED "Build shared lib" ${PNG_SHARED})
  63 else()
  64   option(PNG_SHARED "Build shared lib" ON)
  65 endif()
  66 if(DEFINED PNG_STATIC)
  67   option(PNG_STATIC "Build static lib" ${PNG_STATIC})
  68 else()
  69   option(PNG_STATIC "Build static lib" ON)
  70 endif()
  71
  72 option(PNG_TESTS  "Build libpng tests" YES)
  73
  74 # Many more configuration options could be added here
  75 option(PNG_DEBUG         "Build with debug output" NO)
  76 option(PNGARG            "Disable ANSI-C prototypes" NO)
  77
  78 # SET LIBNAME
  79 set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR})
  80
  81 # to distinguish between debug and release lib
  82 set(CMAKE_DEBUG_POSTFIX "d")
  83
  84 # Use the prebuilt pnglibconf.h file from the scripts folder
  85 # TODO: fix this by building with awk; without this no cmake build can be
  86 # configured directly (to do so indirectly use your local awk to build a
  87 # pnglibconf.h in the build directory.)
  88 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt
  89                ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h)
  90 include_directories(${CMAKE_CURRENT_BINARY_DIR})
  91
  92 # OUR SOURCES
  93 set(libpng_public_hdrs
  94   png.h
  95   pngconf.h
  96   ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h
  97 )
  98 set(libpng_sources
  99   ${libpng_public_hdrs}
 100   pngdebug.h
 101   pnginfo.h
 102   pngpriv.h
 103   pngstruct.h
 104   png.c
 105   pngerror.c
 106   pngget.c
 107   pngmem.c
 108   pngpread.c
 109   pngread.c
 110   pngrio.c
 111   pngrtran.c
 112   pngrutil.c
 113   pngset.c
 114   pngtrans.c
 115   pngwio.c
 116   pngwrite.c
 117   pngwtran.c
 118   pngwutil.c
 119 )
 120 set(pngtest_sources
 121   pngtest.c
 122 )
 123 set(pngvalid_sources
 124   contrib/libtests/pngvalid.c
 125 )
 126 set(pngstest_sources
 127   contrib/libtests/pngstest.c
 128 )
 129 # SOME NEEDED DEFINITIONS
 130
 131 if(MSVC)
 132   add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
 133 endif(MSVC)
 134
 135 if(PNG_DEBUG)
 136   add_definitions(-DPNG_DEBUG)
 137 endif()
 138
 139 # NOW BUILD OUR TARGET
 140 include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIR})
 141
 142 unset(PNG_LIB_TARGETS)
 143
 144 if(PNG_SHARED)
 145   add_library(${PNG_LIB_NAME} SHARED ${libpng_sources})
 146   set(PNG_LIB_TARGETS ${PNG_LIB_NAME})
 147   if(MSVC)
 148     # msvc does not append 'lib' - do it here to have consistent name
 149     set_target_properties(${PNG_LIB_NAME} PROPERTIES PREFIX "lib")
 150     set_target_properties(${PNG_LIB_NAME} PROPERTIES IMPORT_PREFIX "lib")
 151   endif()
 152   target_link_libraries(${PNG_LIB_NAME} ${ZLIB_LIBRARY} ${M_LIBRARY})
 153 endif()
 154
 155 if(PNG_STATIC)
 156 # does not work without changing name
 157   set(PNG_LIB_NAME_STATIC ${PNG_LIB_NAME}_static)
 158   add_library(${PNG_LIB_NAME_STATIC} STATIC ${libpng_sources})
 159   list(APPEND PNG_LIB_TARGETS ${PNG_LIB_NAME_STATIC})
 160   if(MSVC)
 161     # msvc does not append 'lib' - do it here to have consistent name
 162     set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES PREFIX "lib")
 163   endif()
 164   target_link_libraries(${PNG_LIB_NAME_STATIC} ${ZLIB_LIBRARY} ${M_LIBRARY})
 165 endif()
 166
 167 if(NOT PNG_LIB_TARGETS)
 168   message(SEND_ERROR
 169     "No library variant selected to build. "
 170     "Please enable at least one of the following options: PNG_STATIC, PNG_SHARED")
 171 endif()
 172
 173 if(PNG_SHARED AND WIN32)
 174   set_target_properties(${PNG_LIB_NAME} PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL)
 175 endif()
 176
 177 if(PNG_TESTS AND PNG_SHARED)
 178   # does not work with msvc due to png_lib_ver issue
 179   add_executable(pngtest ${pngtest_sources})
 180   target_link_libraries(pngtest ${PNG_LIB_NAME})
 181   add_test(pngtest ./pngtest ${CMAKE_CURRENT_SOURCE_DIR}/pngtest.png)
 182   #
 183   add_executable(pngvalid ${pngvalid_sources})
 184   target_link_libraries(pngvalid ${PNG_LIB_NAME})
 185   add_test(pngvalid ./pngvalid)
 186   add_executable(pngstest ${pngstest_sources})
 187   target_link_libraries(pngstest ${PNG_LIB_NAME})
 188   add_test(pngstest ./pngstest
 189     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g01.png
 190     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g02.png
 191     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g04.png
 192     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g08.png
 193     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g16.png
 194     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn2c08.png
 195     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn2c16.png
 196     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p01.png
 197     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p02.png
 198     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p04.png
 199     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p08.png
 200     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn4a08.png
 201     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn4a16.png
 202     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn6a08.png
 203     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn6a16.png
 204     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn0g01.png
 205     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn0g02.png
 206     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn0g04.png
 207     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn2c16.png
 208     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn3p08.png
 209     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbgn2c16.png
 210     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbgn3p08.png
 211     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbrn2c08.png
 212     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbwn0g16.png
 213     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbwn3p08.png
 214     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbyn3p08.png
 215     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp0n0g08.png
 216     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp0n2c08.png
 217     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp0n3p08.png
 218     ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp1n3p08.png
 219   )
 220 endif()
 221
 222 # Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set
 223 IF(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
 224   SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY "lib")
 225 ENDIF(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
 226
 227 # Set a variable with CMake code which:
 228 # Creates a symlink from src to dest (if possible) or alternatively
 229 # copies if different.
 230 macro(CREATE_SYMLINK SRC_FILE DEST_FILE)
 231   FILE(REMOVE ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
 232   if(WIN32 AND NOT CYGWIN AND NOT MSYS)
 233     ADD_CUSTOM_COMMAND(
 234         OUTPUT ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}   ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE}
 235         COMMAND ${CMAKE_COMMAND} -E copy_if_different  "${SRC_FILE}" ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}
 236         COMMAND ${CMAKE_COMMAND} -E copy_if_different  "${SRC_FILE}" ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE}
 237         DEPENDS ${PNG_LIB_TARGETS}
 238         )
 239     ADD_CUSTOM_TARGET(${DEST_FILE}_COPY ALL DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
 240   else(WIN32 AND NOT CYGWIN AND NOT MSYS)
 241     get_filename_component(LINK_TARGET "${SRC_FILE}" NAME)
 242     execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 243     execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 244   endif(WIN32 AND NOT CYGWIN AND NOT MSYS)
 245 endmacro()
 246
 247 # libpng is a library so default to 'lib'
 248 if(NOT DEFINED CMAKE_INSTALL_LIBDIR)
 249   set(CMAKE_INSTALL_LIBDIR lib)
 250 endif(NOT DEFINED CMAKE_INSTALL_LIBDIR)
 251
 252 # CREATE PKGCONFIG FILES
 253 # we use the same files like ./configure, so we have to set its vars
 254 # Only do this on Windows for Cygwin - the files don't make much sense outside
 255 # a UNIX look alike
 256 if(NOT WIN32 OR CYGWIN OR MINGW)
 257   set(prefix      ${CMAKE_INSTALL_PREFIX})
 258   set(exec_prefix ${CMAKE_INSTALL_PREFIX})
 259   set(libdir      ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
 260   set(includedir  ${CMAKE_INSTALL_PREFIX}/include)
 261   set(LIBS        "-lz -lm")
 262   configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng.pc.in
 263     ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc @ONLY)
 264   CREATE_SYMLINK(${PNGLIB_NAME}.pc libpng.pc)
 265
 266   configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng-config.in
 267     ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config @ONLY)
 268   CREATE_SYMLINK(${PNGLIB_NAME}-config libpng-config)
 269 endif(NOT WIN32 OR CYGWIN OR MINGW)
 270
 271 # SET UP LINKS
 272 if(PNG_SHARED)
 273   set_target_properties(${PNG_LIB_NAME} PROPERTIES
 274 #   VERSION 16.${PNGLIB_RELEASE}.1.6.2
 275     VERSION 16.${PNGLIB_RELEASE}.0
 276     SOVERSION 16
 277     CLEAN_DIRECT_OUTPUT 1)
 278 endif()
 279 if(PNG_STATIC)
 280   # MSVC doesn't use a different file extension for shared vs. static
 281   # libs.  We are able to change OUTPUT_NAME to remove the _static
 282   # for all other platforms.
 283   if(NOT MSVC)
 284     set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES
 285       OUTPUT_NAME ${PNG_LIB_NAME}
 286       CLEAN_DIRECT_OUTPUT 1)
 287   endif()
 288 endif()
 289
 290 # If CMake > 2.4.x, we set a variable used below to export
 291 # targets to an export file.
 292 # TODO: Use VERSION_GREATER after our cmake_minimum_required >= 2.6.2
 293 if(CMAKE_MAJOR_VERSION GREATER 1 AND CMAKE_MINOR_VERSION GREATER 4)
 294   set(PNG_EXPORT_RULE EXPORT libpng)
 295 elseif(CMAKE_MAJOR_VERSION GREATER 2) # future proof
 296   set(PNG_EXPORT_RULE EXPORT libpng)
 297 endif()
 298
 299 # INSTALL
 300 if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
 301   install(TARGETS ${PNG_LIB_TARGETS}
 302       ${PNG_EXPORT_RULE}
 303       RUNTIME DESTINATION bin
 304       LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
 305       ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
 306
 307   if(PNG_SHARED)
 308     # Create a symlink for libpng.dll.a => libpng16.dll.a on Cygwin
 309     if(CYGWIN OR MINGW)
 310        get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE})
 311        CREATE_SYMLINK(${BUILD_TARGET_LOCATION} libpng${CMAKE_IMPORT_LIBRARY_SUFFIX})
 312        install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_IMPORT_LIBRARY_SUFFIX}
 313          DESTINATION ${CMAKE_INSTALL_LIBDIR})
 314     endif(CYGWIN OR MINGW)
 315
 316     if(NOT WIN32)
 317       get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE})
 318       CREATE_SYMLINK(${BUILD_TARGET_LOCATION} libpng${CMAKE_SHARED_LIBRARY_SUFFIX})
 319       install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_SHARED_LIBRARY_SUFFIX}
 320          DESTINATION ${CMAKE_INSTALL_LIBDIR})
 321     endif(NOT WIN32)
 322   endif(PNG_SHARED)
 323
 324   if(PNG_STATIC)
 325     if(NOT WIN32 OR CYGWIN OR MINGW)
 326       get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME_STATIC} LOCATION_${CMAKE_BUILD_TYPE})
 327       CREATE_SYMLINK(${BUILD_TARGET_LOCATION} libpng${CMAKE_STATIC_LIBRARY_SUFFIX})
 328       install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_STATIC_LIBRARY_SUFFIX}
 329          DESTINATION ${CMAKE_INSTALL_LIBDIR})
 330     endif(NOT WIN32 OR CYGWIN OR MINGW)
 331  endif()
 332 endif()
 333
 334 if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )
 335   install(FILES ${libpng_public_hdrs}   DESTINATION include)
 336   install(FILES ${libpng_public_hdrs}   DESTINATION include/${PNGLIB_NAME})
 337 endif()
 338 if(NOT SKIP_INSTALL_EXECUTABLES AND NOT SKIP_INSTALL_ALL )
 339   if(NOT WIN32 OR CYGWIN OR MINGW)
 340     install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config DESTINATION bin)
 341     install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
 342             DESTINATION bin)
 343   endif(NOT WIN32 OR CYGWIN OR MINGW)
 344 endif()
 345
 346 if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
 347   # Install man pages
 348   if(NOT PNG_MAN_DIR)
 349     set(PNG_MAN_DIR "share/man")
 350   endif()
 351   install(FILES libpng.3 libpngpf.3      DESTINATION ${PNG_MAN_DIR}/man3)
 352   install(FILES png.5                    DESTINATION ${PNG_MAN_DIR}/man5)
 353   # Install pkg-config files
 354   if(NOT WIN32 OR CYGWIN OR MINGW)
 355     install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng.pc
 356             DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 357     install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config
 358             DESTINATION bin)
 359     install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc
 360             DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 361     install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
 362             DESTINATION bin)
 363   endif(NOT WIN32 OR CYGWIN OR MINGW)
 364 endif()
 365
 366 # On versions of CMake that support it, create an export file CMake
 367 # users can include() to import our targets
 368 if(PNG_EXPORT_RULE AND NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL )
 369   install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake)
 370 endif()
 371
 372 # what's with libpng-$VER%.txt and all the extra files?
 373
 374 # UNINSTALL
 375 # do we need this?
 376
 377 # DIST
 378 # do we need this?
 379
 380 # to create msvc import lib for mingw compiled shared lib
 381 # pexports libpng.dll > libpng.def
 382 # lib /def:libpng.def /machine:x86
 383