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FindGDAL uses GDAL's 'gdal-config' utility to obtain the path to GDAL's library (on systems identified by CMake's UNIX variable). Older versions formatted this information like that of dependent libraries: -L/path/to/gdal/lib -lgdal[suffix] Newer versions instead provide the full path to the library: /path/to/gdal/lib/[prefix]gdal[suffix] FindGDAL now supports both formats. Entries that don't start with '-L' or '-l' are only considered if they are absolute paths that exist on disk. Furthermore, libraries are only considered if the name contains 'gdal' (checked case-insensitively).
130 lines
4.1 KiB
CMake
130 lines
4.1 KiB
CMake
# 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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#
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#
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#
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# Locate gdal
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#
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# This module accepts the following environment variables:
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#
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# ::
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#
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# GDAL_DIR or GDAL_ROOT - Specify the location of GDAL
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#
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#
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#
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# This module defines the following CMake variables:
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#
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# ::
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#
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# GDAL_FOUND - True if libgdal is found
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# GDAL_LIBRARY - A variable pointing to the GDAL library
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# GDAL_INCLUDE_DIR - Where to find the headers
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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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)
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if(UNIX)
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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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)
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if(GDAL_CONFIG)
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exec_program(${GDAL_CONFIG} ARGS --libs OUTPUT_VARIABLE GDAL_CONFIG_LIBS)
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if(GDAL_CONFIG_LIBS)
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# treat the output as a command line and split it up
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separate_arguments(args NATIVE_COMMAND "${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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find_library(GDAL_LIBRARY
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NAMES ${_gdal_lib} gdal gdal_i gdal1.5.0 gdal1.4.0 gdal1.3.2 GDAL
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HINTS
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ENV GDAL_DIR
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ENV GDAL_ROOT
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${_gdal_libpath}
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PATH_SUFFIXES lib
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)
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(GDAL DEFAULT_MSG GDAL_LIBRARY GDAL_INCLUDE_DIR)
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set(GDAL_LIBRARIES ${GDAL_LIBRARY})
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set(GDAL_INCLUDE_DIRS ${GDAL_INCLUDE_DIR})
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