diff options
| -rw-r--r-- | CMake/options.cmake | 252 |
1 files changed, 144 insertions, 108 deletions
diff --git a/CMake/options.cmake b/CMake/options.cmake index 4064d7102..ae77c7c46 100644 --- a/CMake/options.cmake +++ b/CMake/options.cmake @@ -15,6 +15,38 @@ # https://www.fltk.org/bugs.php # +####################################################################### +# Important implementation note for FLTK developers +####################################################################### +# +# *FIXME* In the current version of FLTK's CMake build files we're +# using 'include_directories()' to define directories that must be +# used in compile commands (typically "-Idirectories"). +# +# include_directories() is a global command that affects *all* source +# files in the current directory and all subdirectories. This can lead +# to conflicts and should be replaced with target_include_directories() +# which can be applied to particular targets and source files only. +# +# This could remove some of these potential build conflicts, for +# instance # if the bundled image libs and Cairo or Pango are used +# together (Pango depends on Cairo and Cairo depends on libpng). +# However, this is not a proper solution! +# +# That said, order of "-I..." switches matters, and therefore the +# bundled libraries (png, jpeg, zlib) *must* appear before any other +# include_directories() statements that might introduce conflicts. +# Currently 'resources.cmake' is included before this file and thus +# 'include_directories (${FREETYPE_PATH})' is executed before this +# file but this doesn't matter. +# +# This *MUST* be fixed using target_include_directories() as +# appropriate but this would need a major rework. +# +# Albrecht-S April 6, 2022 +# +####################################################################### + set (DEBUG_OPTIONS_CMAKE 0) if (DEBUG_OPTIONS_CMAKE) message (STATUS "[** options.cmake **]") @@ -46,6 +78,118 @@ set (OPTION_ABI_VERSION "" set (FL_ABI_VERSION ${OPTION_ABI_VERSION}) ####################################################################### +# Bundled Library Options +####################################################################### + +option (OPTION_USE_SYSTEM_ZLIB "use system zlib" ON) + +if (APPLE) + option (OPTION_USE_SYSTEM_LIBJPEG "use system libjpeg" OFF) + option (OPTION_USE_SYSTEM_LIBPNG "use system libpng" OFF) +else () + option (OPTION_USE_SYSTEM_LIBJPEG "use system libjpeg" ON) + option (OPTION_USE_SYSTEM_LIBPNG "use system libpng" ON) +endif () + +####################################################################### +# Bundled Compression Library : zlib +####################################################################### + +if (OPTION_USE_SYSTEM_ZLIB) + find_package (ZLIB) +endif () + +if (OPTION_USE_SYSTEM_ZLIB AND ZLIB_FOUND) + set (FLTK_USE_BUILTIN_ZLIB FALSE) + set (FLTK_ZLIB_LIBRARIES ${ZLIB_LIBRARIES}) + include_directories (${ZLIB_INCLUDE_DIRS}) +else() + if (OPTION_USE_SYSTEM_ZLIB) + message (STATUS "cannot find system zlib library - using built-in\n") + endif () + + add_subdirectory (zlib) + set (FLTK_USE_BUILTIN_ZLIB TRUE) + set (FLTK_ZLIB_LIBRARIES fltk_z) + set (ZLIB_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/zlib) + include_directories (${CMAKE_CURRENT_SOURCE_DIR}/zlib) +endif () + +set (HAVE_LIBZ 1) + +####################################################################### +# Bundled Image Library : libjpeg +####################################################################### + +if (OPTION_USE_SYSTEM_LIBJPEG) + find_package (JPEG) +endif () + +if (OPTION_USE_SYSTEM_LIBJPEG AND JPEG_FOUND) + set (FLTK_USE_BUILTIN_JPEG FALSE) + set (FLTK_JPEG_LIBRARIES ${JPEG_LIBRARIES}) + include_directories (${JPEG_INCLUDE_DIR}) +else () + if (OPTION_USE_SYSTEM_LIBJPEG) + message (STATUS "cannot find system jpeg library - using built-in\n") + endif () + + add_subdirectory (jpeg) + set (FLTK_USE_BUILTIN_JPEG TRUE) + set (FLTK_JPEG_LIBRARIES fltk_jpeg) + include_directories (${CMAKE_CURRENT_SOURCE_DIR}/jpeg) +endif () + +set (HAVE_LIBJPEG 1) + +####################################################################### +# Bundled Image Library : libpng +####################################################################### + +if (OPTION_USE_SYSTEM_LIBPNG) + find_package (PNG) +endif () + +if (OPTION_USE_SYSTEM_LIBPNG AND PNG_FOUND) + + set (FLTK_USE_BUILTIN_PNG FALSE) + set (FLTK_PNG_LIBRARIES ${PNG_LIBRARIES}) + include_directories (${PNG_INCLUDE_DIRS}) + add_definitions (${PNG_DEFINITIONS}) + + set (_INCLUDE_SAVED ${CMAKE_REQUIRED_INCLUDES}) + list (APPEND CMAKE_REQUIRED_INCLUDES ${PNG_INCLUDE_DIRS}) + + # Note: we do not check for <libpng/png.h> explicitly. + # This is assumed to exist if we have PNG_FOUND and don't find <png.h> + + # FIXME - Force search by unsetting the chache variable. Maybe use + # FIXME - another cache variable to check for option changes? + + unset (HAVE_PNG_H CACHE) # force search + check_include_file (png.h HAVE_PNG_H) + mark_as_advanced (HAVE_PNG_H) + + set (CMAKE_REQUIRED_INCLUDES ${_INCLUDE_SAVED}) + unset (_INCLUDE_SAVED) + +else () + + if (OPTION_USE_SYSTEM_LIBPNG) + message (STATUS "cannot find system png library - using built-in\n") + endif () + + add_subdirectory (png) + set (FLTK_USE_BUILTIN_PNG TRUE) + set (FLTK_PNG_LIBRARIES fltk_png) + set (HAVE_PNG_H 1) + set (HAVE_PNG_GET_VALID 1) + set (HAVE_PNG_SET_TRNS_TO_ALPHA 1) + include_directories (${CMAKE_CURRENT_SOURCE_DIR}/png) +endif () + +set (HAVE_LIBPNG 1) + ####################################################################### if (UNIX) option (OPTION_CREATE_LINKS "create backwards compatibility links" OFF) @@ -365,114 +509,6 @@ if (debug_threads) endif (debug_threads) unset (debug_threads) -####################################################################### -# Image Library Options -####################################################################### - -option (OPTION_USE_SYSTEM_ZLIB "use system zlib" ON) - -if (APPLE) - option (OPTION_USE_SYSTEM_LIBJPEG "use system libjpeg" OFF) - option (OPTION_USE_SYSTEM_LIBPNG "use system libpng" OFF) -else () - option (OPTION_USE_SYSTEM_LIBJPEG "use system libjpeg" ON) - option (OPTION_USE_SYSTEM_LIBPNG "use system libpng" ON) -endif () - -####################################################################### -# Image Library : ZLIB -####################################################################### - -if (OPTION_USE_SYSTEM_ZLIB) - find_package (ZLIB) -endif () - -if (OPTION_USE_SYSTEM_ZLIB AND ZLIB_FOUND) - set (FLTK_USE_BUILTIN_ZLIB FALSE) - set (FLTK_ZLIB_LIBRARIES ${ZLIB_LIBRARIES}) - include_directories (${ZLIB_INCLUDE_DIRS}) -else() - if (OPTION_USE_SYSTEM_ZLIB) - message (STATUS "cannot find system zlib library - using built-in\n") - endif () - - add_subdirectory (zlib) - set (FLTK_USE_BUILTIN_ZLIB TRUE) - set (FLTK_ZLIB_LIBRARIES fltk_z) - set (ZLIB_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/zlib) - include_directories (${CMAKE_CURRENT_SOURCE_DIR}/zlib) -endif () - -set (HAVE_LIBZ 1) - -####################################################################### - -if (OPTION_USE_SYSTEM_LIBJPEG) - find_package (JPEG) -endif () - -if (OPTION_USE_SYSTEM_LIBJPEG AND JPEG_FOUND) - set (FLTK_USE_BUILTIN_JPEG FALSE) - set (FLTK_JPEG_LIBRARIES ${JPEG_LIBRARIES}) - include_directories (${JPEG_INCLUDE_DIR}) -else () - if (OPTION_USE_SYSTEM_LIBJPEG) - message (STATUS "cannot find system jpeg library - using built-in\n") - endif () - - add_subdirectory (jpeg) - set (FLTK_USE_BUILTIN_JPEG TRUE) - set (FLTK_JPEG_LIBRARIES fltk_jpeg) - include_directories (${CMAKE_CURRENT_SOURCE_DIR}/jpeg) -endif () - -set (HAVE_LIBJPEG 1) - -####################################################################### - -if (OPTION_USE_SYSTEM_LIBPNG) - find_package (PNG) -endif () - -if (OPTION_USE_SYSTEM_LIBPNG AND PNG_FOUND) - - set (FLTK_USE_BUILTIN_PNG FALSE) - set (FLTK_PNG_LIBRARIES ${PNG_LIBRARIES}) - include_directories (${PNG_INCLUDE_DIRS}) - add_definitions (${PNG_DEFINITIONS}) - - set (_INCLUDE_SAVED ${CMAKE_REQUIRED_INCLUDES}) - list (APPEND CMAKE_REQUIRED_INCLUDES ${PNG_INCLUDE_DIRS}) - - # Note: we do not check for <libpng/png.h> explicitly. - # This is assumed to exist if we have PNG_FOUND and don't find <png.h> - - # FIXME - Force search by unsetting the chache variable. Maybe use - # FIXME - another cache variable to check for option changes? - - unset (HAVE_PNG_H CACHE) # force search - check_include_file (png.h HAVE_PNG_H) - mark_as_advanced (HAVE_PNG_H) - - set (CMAKE_REQUIRED_INCLUDES ${_INCLUDE_SAVED}) - unset (_INCLUDE_SAVED) - -else () - - if (OPTION_USE_SYSTEM_LIBPNG) - message (STATUS "cannot find system png library - using built-in\n") - endif () - - add_subdirectory (png) - set (FLTK_USE_BUILTIN_PNG TRUE) - set (FLTK_PNG_LIBRARIES fltk_png) - set (HAVE_PNG_H 1) - set (HAVE_PNG_GET_VALID 1) - set (HAVE_PNG_SET_TRNS_TO_ALPHA 1) - include_directories (${CMAKE_CURRENT_SOURCE_DIR}/png) -endif () - -set (HAVE_LIBPNG 1) ####################################################################### if (X11_Xinerama_FOUND) |