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200 lines
6.5 KiB
200 lines
6.5 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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FindGDAL
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--------
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Find Geospatial Data Abstraction Library (GDAL).
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IMPORTED Targets
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^^^^^^^^^^^^^^^^
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.. versionadded:: 3.14
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This module defines :prop_tgt:`IMPORTED` target ``GDAL::GDAL``
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if GDAL has been 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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``GDAL_FOUND``
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True if GDAL is found.
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``GDAL_INCLUDE_DIRS``
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Include directories for GDAL headers.
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``GDAL_LIBRARIES``
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Libraries to link to GDAL.
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``GDAL_VERSION``
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.. versionadded:: 3.14
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The version of GDAL 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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``GDAL_LIBRARY``
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The libgdal library file.
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``GDAL_INCLUDE_DIR``
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The directory containing ``gdal.h``.
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Hints
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^^^^^
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Set ``GDAL_DIR`` or ``GDAL_ROOT`` in the environment to specify the
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GDAL installation prefix.
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The following variables may be set to modify the search strategy:
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``FindGDAL_SKIP_GDAL_CONFIG``
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If set, ``gdal-config`` will not be used. This can be useful if there are
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GDAL libraries built with autotools (which provide the tool) and CMake (which
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do not) in the same environment.
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``GDAL_ADDITIONAL_LIBRARY_VERSIONS``
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Extra versions of library names to search for.
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#]=======================================================================]
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# $GDALDIR is an environment variable that would
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# correspond to the ./configure --prefix=$GDAL_DIR
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# used in building gdal.
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#
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# Created by Eric Wing. I'm not a gdal user, but OpenSceneGraph uses it
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# for osgTerrain so I whipped this module together for completeness.
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# I actually don't know the conventions or where files are typically
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# placed in distros.
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# Any real gdal users are encouraged to correct this (but please don't
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# break the OS X framework stuff when doing so which is what usually seems
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# to happen).
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# This makes the presumption that you are include gdal.h like
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#
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#include "gdal.h"
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find_path(GDAL_INCLUDE_DIR gdal.h
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HINTS
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ENV GDAL_DIR
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ENV GDAL_ROOT
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PATH_SUFFIXES
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include/gdal
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include/GDAL
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include
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DOC "Path to the GDAL include directory"
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)
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mark_as_advanced(GDAL_INCLUDE_DIR)
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if(UNIX AND NOT FindGDAL_SKIP_GDAL_CONFIG)
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# Use gdal-config to obtain the library version (this should hopefully
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# allow us to -lgdal1.x.y where x.y are correct version)
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# For some reason, libgdal development packages do not contain
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# libgdal.so...
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find_program(GDAL_CONFIG gdal-config
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HINTS
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ENV GDAL_DIR
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ENV GDAL_ROOT
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PATH_SUFFIXES bin
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DOC "Path to the gdal-config tool"
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)
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mark_as_advanced(GDAL_CONFIG)
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if(GDAL_CONFIG)
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execute_process(COMMAND ${GDAL_CONFIG} --libs OUTPUT_VARIABLE GDAL_CONFIG_LIBS)
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if(GDAL_CONFIG_LIBS)
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# treat the output as a command line and split it up
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separate_arguments(args NATIVE_COMMAND "${GDAL_CONFIG_LIBS}")
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# only consider libraries whose name matches this pattern
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set(name_pattern "[gG][dD][aA][lL]")
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# consider each entry as a possible library path, name, or parent directory
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foreach(arg IN LISTS args)
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# library name
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if("${arg}" MATCHES "^-l(.*)$")
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set(lib "${CMAKE_MATCH_1}")
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# only consider libraries whose name matches the expected pattern
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if("${lib}" MATCHES "${name_pattern}")
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list(APPEND _gdal_lib "${lib}")
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endif()
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# library search path
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elseif("${arg}" MATCHES "^-L(.*)$")
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list(APPEND _gdal_libpath "${CMAKE_MATCH_1}")
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# assume this is a full path to a library
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elseif(IS_ABSOLUTE "${arg}" AND EXISTS "${arg}")
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# extract the file name
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get_filename_component(lib "${arg}" NAME)
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# only consider libraries whose name matches the expected pattern
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if(NOT "${lib}" MATCHES "${name_pattern}")
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continue()
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endif()
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# extract the file directory
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get_filename_component(dir "${arg}" DIRECTORY)
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# remove library prefixes/suffixes
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string(REGEX REPLACE "^(${CMAKE_SHARED_LIBRARY_PREFIX}|${CMAKE_STATIC_LIBRARY_PREFIX})" "" lib "${lib}")
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string(REGEX REPLACE "(${CMAKE_SHARED_LIBRARY_SUFFIX}|${CMAKE_STATIC_LIBRARY_SUFFIX})$" "" lib "${lib}")
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# use the file name and directory as hints
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list(APPEND _gdal_libpath "${dir}")
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list(APPEND _gdal_lib "${lib}")
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endif()
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endforeach()
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endif()
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endif()
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endif()
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# GDAL name its library when built with CMake as `gdal${major}${minor}`.
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set(_gdal_versions
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${GDAL_ADDITIONAL_LIBRARY_VERSIONS} 3.0 2.4 2.3 2.2 2.1 2.0 1.11 1.10 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2)
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set(_gdal_libnames)
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foreach (_gdal_version IN LISTS _gdal_versions)
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string(REPLACE "." "" _gdal_version "${_gdal_version}")
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list(APPEND _gdal_libnames "gdal${_gdal_version}" "GDAL${_gdal_version}")
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endforeach ()
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unset(_gdal_version)
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unset(_gdal_versions)
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find_library(GDAL_LIBRARY
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NAMES ${_gdal_lib} ${_gdal_libnames} gdal gdal_i gdal1.5.0 gdal1.4.0 gdal1.3.2 GDAL
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HINTS
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ENV GDAL_DIR
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ENV GDAL_ROOT
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${_gdal_libpath}
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PATH_SUFFIXES lib
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DOC "Path to the GDAL library"
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)
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mark_as_advanced(GDAL_LIBRARY)
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unset(_gdal_libnames)
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unset(_gdal_lib)
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if (EXISTS "${GDAL_INCLUDE_DIR}/gdal_version.h")
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file(STRINGS "${GDAL_INCLUDE_DIR}/gdal_version.h" _gdal_version
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REGEX "GDAL_RELEASE_NAME")
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string(REGEX REPLACE ".*\"\(.*\)\"" "\\1" GDAL_VERSION "${_gdal_version}")
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unset(_gdal_version)
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else ()
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set(GDAL_VERSION GDAL_VERSION-NOTFOUND)
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endif ()
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(GDAL
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VERSION_VAR GDAL_VERSION
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REQUIRED_VARS GDAL_LIBRARY GDAL_INCLUDE_DIR)
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if (GDAL_FOUND)
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set(GDAL_LIBRARIES ${GDAL_LIBRARY})
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set(GDAL_INCLUDE_DIRS ${GDAL_INCLUDE_DIR})
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if (NOT TARGET GDAL::GDAL)
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add_library(GDAL::GDAL UNKNOWN IMPORTED)
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set_target_properties(GDAL::GDAL PROPERTIES
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IMPORTED_LOCATION "${GDAL_LIBRARY}"
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INTERFACE_INCLUDE_DIRECTORIES "${GDAL_INCLUDE_DIR}")
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endif ()
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endif ()
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