cmake/modules/FindKdcraw.cmake

0001 # Try to find the Kdcraw library
0002 #
0003 # Parameters:
0004 #  KDCRAW_LOCAL_DIR - If you have put a local version of libkdcraw into
0005 #                     your source tree, set KDCRAW_LOCAL_DIR to the
0006 #                     relative path from the root of your source tree
0007 #                     to the libkdcraw local directory.
0008 #
0009 # Once done this will define
0010 #
0011 #  KDCRAW_FOUND - System has libkdcraw
0012 #  KDCRAW_INCLUDE_DIR - The libkdcraw include directory/directories (for #include <libkdcraw/...> style)
0013 #  KDCRAW_LIBRARIES - Link these to use libkdcraw
0014 #  KDCRAW_DEFINITIONS - Compiler switches required for using libkdcraw
0015 #  KDCRAW_VERSION - Version of libkdcraw which was found
0016 #
0017 # Copyright (c) 2008-2011, Gilles Caulier, <caulier.gilles@gmail.com>
0018 # Copyright (c) 2011, Michael G. Hansen, <mike@mghansen.de>
0019 #
0020 # Redistribution and use is allowed according to the terms of the BSD license.
0021 # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
0022
0023 # Kdcraw_FIND_QUIETLY and Kdcraw_FIND_REQUIRED may be defined by CMake.
0024
0025 if (KDCRAW_INCLUDE_DIR AND KDCRAW_LIBRARIES AND KDCRAW_DEFINITIONS AND KDCRAW_VERSION)
0026
0027   if (NOT Kdcraw_FIND_QUIETLY)
0028     message(STATUS "Found Kdcraw library in cache: ${KDCRAW_LIBRARIES}")
0029   endif (NOT Kdcraw_FIND_QUIETLY)
0030
0031   # in cache already
0032   set(KDCRAW_FOUND TRUE)
0033
0034 else (KDCRAW_INCLUDE_DIR AND KDCRAW_LIBRARIES AND KDCRAW_DEFINITIONS AND KDCRAW_VERSION)
0035
0036   if (NOT Kdcraw_FIND_QUIETLY)
0037     message(STATUS "Check for Kdcraw library in local sub-folder...")
0038   endif (NOT Kdcraw_FIND_QUIETLY)
0039
0040   # Check for a local version of the library.
0041   if (KDCRAW_LOCAL_DIR)
0042     find_file(KDCRAW_LOCAL_FOUND libkdcraw/version.h.cmake ${CMAKE_SOURCE_DIR}/${KDCRAW_LOCAL_DIR} NO_DEFAULT_PATH)
0043     if (NOT KDCRAW_LOCAL_FOUND)
0044       message(WARNING "KDCRAW_LOCAL_DIR specified as \"${KDCRAW_LOCAL_DIR}\" but libkdcraw could not be found there.")
0045     endif (NOT KDCRAW_LOCAL_FOUND)
0046   else (KDCRAW_LOCAL_DIR)
0047     find_file(KDCRAW_LOCAL_FOUND libkdcraw/version.h.cmake ${CMAKE_SOURCE_DIR}/libkdcraw NO_DEFAULT_PATH)
0048     if (KDCRAW_LOCAL_FOUND)
0049       set(KDCRAW_LOCAL_DIR libkdcraw)
0050     endif (KDCRAW_LOCAL_FOUND)
0051     find_file(KDCRAW_LOCAL_FOUND libkdcraw/version.h.cmake ${CMAKE_SOURCE_DIR}/libs/libkdcraw NO_DEFAULT_PATH)
0052     if (KDCRAW_LOCAL_FOUND)
0053       set(KDCRAW_LOCAL_DIR libs/libkdcraw)
0054     endif (KDCRAW_LOCAL_FOUND)
0055   endif (KDCRAW_LOCAL_DIR)
0056
0057   if (KDCRAW_LOCAL_FOUND)
0058     # We need two include directories: because the version.h file is put into the build directory
0059     # TODO KDCRAW_INCLUDE_DIR sounds like it should contain only one directory...
0060     set(KDCRAW_INCLUDE_DIR ${CMAKE_SOURCE_DIR}/${KDCRAW_LOCAL_DIR} ${CMAKE_BINARY_DIR}/${KDCRAW_LOCAL_DIR})
0061     set(KDCRAW_DEFINITIONS "-I${CMAKE_SOURCE_DIR}/${KDCRAW_LOCAL_DIR}" "-I${CMAKE_BINARY_DIR}/${KDCRAW_LOCAL_DIR}")
0062     set(KDCRAW_LIBRARIES kdcraw)
0063     if (NOT Kdcraw_FIND_QUIETLY)
0064       message(STATUS "Found Kdcraw library in local sub-folder: ${CMAKE_SOURCE_DIR}/${KDCRAW_LOCAL_DIR}")
0065     endif (NOT Kdcraw_FIND_QUIETLY)
0066     set(KDCRAW_FOUND TRUE)
0067
0068     set(kdcraw_version_h_filename "${CMAKE_BINARY_DIR}/${KDCRAW_LOCAL_DIR}/libkdcraw/version.h")
0069
0070   else (KDCRAW_LOCAL_FOUND)
0071     if (NOT WIN32)
0072       if (NOT Kdcraw_FIND_QUIETLY)
0073         message(STATUS "Check Kdcraw library using pkg-config...")
0074       endif (NOT Kdcraw_FIND_QUIETLY)
0075
0076       # use FindPkgConfig to get the directories and then use these values
0077       # in the find_path() and find_library() calls
0078       include(FindPkgConfig)
0079
0080       pkg_check_modules(PC_KDCRAW libkdcraw)
0081
0082       if (PC_KDCRAW_FOUND)
0083         # make sure the version is >= 0.2.0
0084         # TODO: WHY?
0085         if (PC_KDCRAW_VERSION VERSION_LESS 0.2.0)
0086           message(STATUS "Found libkdcraw release < 0.2.0, too old")
0087           set(KDCRAW_VERSION_GOOD_FOUND FALSE)
0088           set(KDCRAW_FOUND FALSE)
0089         else (PC_KDCRAW_VERSION VERSION_LESS 0.2.0)
0090           set(KDCRAW_VERSION "${PC_KDCRAW_VERSION}")
0091           if (NOT Kdcraw_FIND_QUIETLY)
0092             message(STATUS "Found libkdcraw release ${KDCRAW_VERSION}")
0093           endif (NOT Kdcraw_FIND_QUIETLY)
0094           set(KDCRAW_VERSION_GOOD_FOUND TRUE)
0095         endif (PC_KDCRAW_VERSION VERSION_LESS 0.2.0)
0096       else (PC_KDCRAW_FOUND)
0097         set(KDCRAW_VERSION_GOOD_FOUND FALSE)
0098       endif (PC_KDCRAW_FOUND)
0099     else (NOT WIN32)
0100       # TODO: Why do we just assume the version is good?
0101       set(KDCRAW_VERSION_GOOD_FOUND TRUE)
0102     endif (NOT WIN32)
0103
0104     if (KDCRAW_VERSION_GOOD_FOUND)
0105       set(KDCRAW_DEFINITIONS "${PC_KDCRAW_CFLAGS_OTHER}")
0106
0107       find_path(KDCRAW_INCLUDE_DIR libkdcraw/version.h ${PC_KDCRAW_INCLUDE_DIRS})
0108       set(kdcraw_version_h_filename "${KDCRAW_INCLUDE_DIR}/libkdcraw/version.h")
0109
0110       find_library(KDCRAW_LIBRARIES NAMES kdcraw HINTS ${PC_KDCRAW_LIBRARY_DIRS})
0111
0112       if (KDCRAW_INCLUDE_DIR AND KDCRAW_LIBRARIES)
0113         set(KDCRAW_FOUND TRUE)
0114       else (KDCRAW_INCLUDE_DIR AND KDCRAW_LIBRARIES)
0115         set(KDCRAW_FOUND FALSE)
0116       endif (KDCRAW_INCLUDE_DIR AND KDCRAW_LIBRARIES)
0117     endif (KDCRAW_VERSION_GOOD_FOUND)
0118
0119     if (KDCRAW_FOUND)
0120       if (NOT Kdcraw_FIND_QUIETLY)
0121         message(STATUS "Found libkdcraw: ${KDCRAW_LIBRARIES}")
0122       endif (NOT Kdcraw_FIND_QUIETLY)
0123     else (KDCRAW_FOUND)
0124       if (Kdcraw_FIND_REQUIRED)
0125         if (NOT KDCRAW_INCLUDE_DIR)
0126           message(FATAL_ERROR "Could NOT find libkdcraw header files.")
0127         else(NOT KDCRAW_INCLUDE_DIR)
0128           message(FATAL_ERROR "Could NOT find libkdcraw library.")
0129         endif (NOT KDCRAW_INCLUDE_DIR)
0130       endif (Kdcraw_FIND_REQUIRED)
0131     endif (KDCRAW_FOUND)
0132
0133   endif (KDCRAW_LOCAL_FOUND)
0134
0135   if (KDCRAW_FOUND)
0136     # Find the version information, unless that was reported by pkg_search_module.
0137     if (NOT KDCRAW_VERSION)
0138       file(READ "${kdcraw_version_h_filename}" kdcraw_version_h_content)
0139       # This is the line we are trying to find: static const char kdcraw_version[] = "1.22.4-beta_5+dfsg";
0140       string(REGEX REPLACE ".*char +kdcraw_version\\[\\] += +\"([^\"]+)\".*" "\\1" KDCRAW_VERSION "${kdcraw_version_h_content}")
0141       unset(kdcraw_version_h_content)
0142
0143     endif (NOT KDCRAW_VERSION)
0144     unset(kdcraw_version_h_filename)
0145   endif (KDCRAW_FOUND)
0146
0147   if (KDCRAW_FOUND)
0148     mark_as_advanced(KDCRAW_INCLUDE_DIR KDCRAW_LIBRARIES KDCRAW_DEFINITIONS KDCRAW_VERSION KDCRAW_FOUND)
0149   else (KDCRAW_FOUND)
0150     # The library was not found, reset all related variables.
0151     unset(KDCRAW_INCLUDE_DIR)
0152     unset(KDCRAW_LIBRARIES)
0153     unset(KDCRAW_DEFINITIONS)
0154     unset(KDCRAW_VERSION)
0155   endif (KDCRAW_FOUND)
0156
0157 endif (KDCRAW_INCLUDE_DIR AND KDCRAW_LIBRARIES AND KDCRAW_DEFINITIONS AND KDCRAW_VERSION)