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146 lines
4.3 KiB
146 lines
4.3 KiB
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#[=======================================================================[.rst:
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FindJPEG
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--------
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Find the Joint Photographic Experts Group (JPEG) library (``libjpeg``)
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Imported targets
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^^^^^^^^^^^^^^^^
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.. versionadded:: 3.12
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This module defines the following :prop_tgt:`IMPORTED` targets:
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``JPEG::JPEG``
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The JPEG library, if found.
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Result variables
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^^^^^^^^^^^^^^^^
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This module will set the following variables in your project:
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``JPEG_FOUND``
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If false, do not try to use JPEG.
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``JPEG_INCLUDE_DIRS``
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where to find jpeglib.h, etc.
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``JPEG_LIBRARIES``
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the libraries needed to use JPEG.
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``JPEG_VERSION``
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.. versionadded:: 3.12
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the version of the JPEG library found
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Cache variables
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^^^^^^^^^^^^^^^
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The following cache variables may also be set:
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``JPEG_INCLUDE_DIR``
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where to find jpeglib.h, etc.
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``JPEG_LIBRARY_RELEASE``
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where to find the JPEG library (optimized).
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``JPEG_LIBRARY_DEBUG``
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where to find the JPEG library (debug).
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.. versionadded:: 3.12
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Debug and Release variand are found separately.
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Obsolete variables
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^^^^^^^^^^^^^^^^^^
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``JPEG_LIBRARY``
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where to find the JPEG library.
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#]=======================================================================]
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cmake_policy(PUSH)
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cmake_policy(SET CMP0159 NEW) # file(STRINGS) with REGEX updates CMAKE_MATCH_<n>
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find_path(JPEG_INCLUDE_DIR jpeglib.h)
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set(jpeg_names ${JPEG_NAMES} jpeg jpeg-static libjpeg libjpeg-static)
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foreach(name ${jpeg_names})
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list(APPEND jpeg_names_debug "${name}d")
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endforeach()
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if(NOT JPEG_LIBRARY)
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find_library(JPEG_LIBRARY_RELEASE NAMES ${jpeg_names} NAMES_PER_DIR)
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find_library(JPEG_LIBRARY_DEBUG NAMES ${jpeg_names_debug} NAMES_PER_DIR)
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include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake)
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select_library_configurations(JPEG)
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mark_as_advanced(JPEG_LIBRARY_RELEASE JPEG_LIBRARY_DEBUG)
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endif()
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unset(jpeg_names)
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unset(jpeg_names_debug)
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if(JPEG_INCLUDE_DIR)
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file(GLOB _JPEG_CONFIG_HEADERS_FEDORA "${JPEG_INCLUDE_DIR}/jconfig*.h")
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file(GLOB _JPEG_CONFIG_HEADERS_DEBIAN "${JPEG_INCLUDE_DIR}/*/jconfig.h")
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set(_JPEG_CONFIG_HEADERS
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"${JPEG_INCLUDE_DIR}/jpeglib.h"
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${_JPEG_CONFIG_HEADERS_FEDORA}
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${_JPEG_CONFIG_HEADERS_DEBIAN})
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foreach (_JPEG_CONFIG_HEADER IN LISTS _JPEG_CONFIG_HEADERS)
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if (NOT EXISTS "${_JPEG_CONFIG_HEADER}")
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continue ()
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endif ()
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file(STRINGS "${_JPEG_CONFIG_HEADER}"
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jpeg_lib_version REGEX "^#define[\t ]+JPEG_LIB_VERSION[\t ]+.*")
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if (NOT jpeg_lib_version)
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continue ()
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endif ()
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string(REGEX REPLACE "^#define[\t ]+JPEG_LIB_VERSION[\t ]+([0-9]+).*"
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"\\1" JPEG_VERSION "${jpeg_lib_version}")
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break ()
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endforeach ()
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unset(jpeg_lib_version)
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unset(_JPEG_CONFIG_HEADER)
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unset(_JPEG_CONFIG_HEADERS)
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unset(_JPEG_CONFIG_HEADERS_FEDORA)
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unset(_JPEG_CONFIG_HEADERS_DEBIAN)
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endif()
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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find_package_handle_standard_args(JPEG
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REQUIRED_VARS JPEG_LIBRARY JPEG_INCLUDE_DIR
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VERSION_VAR JPEG_VERSION)
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if(JPEG_FOUND)
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set(JPEG_LIBRARIES ${JPEG_LIBRARY})
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set(JPEG_INCLUDE_DIRS "${JPEG_INCLUDE_DIR}")
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if(NOT TARGET JPEG::JPEG)
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add_library(JPEG::JPEG UNKNOWN IMPORTED)
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if(JPEG_INCLUDE_DIRS)
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set_target_properties(JPEG::JPEG PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${JPEG_INCLUDE_DIRS}")
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endif()
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if(EXISTS "${JPEG_LIBRARY}")
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set_target_properties(JPEG::JPEG PROPERTIES
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IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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IMPORTED_LOCATION "${JPEG_LIBRARY}")
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endif()
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if(EXISTS "${JPEG_LIBRARY_RELEASE}")
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set_property(TARGET JPEG::JPEG APPEND PROPERTY
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IMPORTED_CONFIGURATIONS RELEASE)
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set_target_properties(JPEG::JPEG PROPERTIES
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IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C"
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IMPORTED_LOCATION_RELEASE "${JPEG_LIBRARY_RELEASE}")
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endif()
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if(EXISTS "${JPEG_LIBRARY_DEBUG}")
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set_property(TARGET JPEG::JPEG APPEND PROPERTY
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IMPORTED_CONFIGURATIONS DEBUG)
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set_target_properties(JPEG::JPEG PROPERTIES
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IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "C"
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IMPORTED_LOCATION_DEBUG "${JPEG_LIBRARY_DEBUG}")
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endif()
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endif()
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endif()
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mark_as_advanced(JPEG_LIBRARY JPEG_INCLUDE_DIR)
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cmake_policy(POP)
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