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FindGDAL: Handle gdal-config printing absolute path to library

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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).
This commit is contained in:
Adam Thompson
2018-02-27 21:08:20 -05:00
parent 4da456c7fe
commit 694fce19b6
1 changed files with 42 additions and 4 deletions
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46
Modules/FindGDAL.cmake
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@@ -66,11 +66,49 @@ if(UNIX)
if(GDAL_CONFIG)
exec_program(${GDAL_CONFIG} ARGS --libs OUTPUT_VARIABLE GDAL_CONFIG_LIBS)
if(GDAL_CONFIG_LIBS)
string(REGEX MATCHALL "-l[^ ]+" _gdal_dashl ${GDAL_CONFIG_LIBS})
string(REPLACE "-l" "" _gdal_lib "${_gdal_dashl}")
string(REGEX MATCHALL "-L[^ ]+" _gdal_dashL ${GDAL_CONFIG_LIBS})
string(REPLACE "-L" "" _gdal_libpath "${_gdal_dashL}")
# treat the output as a command line and split it up
separate_arguments(args NATIVE_COMMAND "${GDAL_CONFIG_LIBS}")
# only consider libraries whose name matches this pattern
set(name_pattern "[gG][dD][aA][lL]")
# consider each entry as a possible library path, name, or parent directory
foreach(arg IN LISTS args)
# library name
if("${arg}" MATCHES "^-l(.*)$")
set(lib "${CMAKE_MATCH_1}")
# only consider libraries whose name matches the expected pattern
if("${lib}" MATCHES "${name_pattern}")
list(APPEND _gdal_lib "${lib}")
endif()
# library search path
elseif("${arg}" MATCHES "^-L(.*)$")
list(APPEND _gdal_libpath "${CMAKE_MATCH_1}")
# assume this is a full path to a library
elseif(IS_ABSOLUTE "${arg}" AND EXISTS "${arg}")
# extract the file name
get_filename_component(lib "${arg}" NAME)
# only consider libraries whose name matches the expected pattern
if(NOT "${lib}" MATCHES "${name_pattern}")
continue()
endif()
# extract the file directory
get_filename_component(dir "${arg}" DIRECTORY)
# remove library prefixes/suffixes
string(REGEX REPLACE "^(${CMAKE_SHARED_LIBRARY_PREFIX}|${CMAKE_STATIC_LIBRARY_PREFIX})" "" lib "${lib}")
string(REGEX REPLACE "(${CMAKE_SHARED_LIBRARY_SUFFIX}|${CMAKE_STATIC_LIBRARY_SUFFIX})$" "" lib "${lib}")
# use the file name and directory as hints
list(APPEND _gdal_libpath "${dir}")
list(APPEND _gdal_lib "${lib}")
endif()
endforeach()
endif()
endif()
endif()