Generate libtool archive (.la) files
These files are text files which specify which platform specific libraries we should be looking for. We need libtool installed to use them, but they can be generated pretty inexpensively from the CMake script itself.
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Roland Kaufmann
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2b7e3f8759
136
cmake/Modules/LibtoolArchives.cmake
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136
cmake/Modules/LibtoolArchives.cmake
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@ -0,0 +1,136 @@
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function (configure_la name target)
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if (NOT (UNIX OR MSYS OR MINGW))
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return ()
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endif (NOT (UNIX OR MSYS OR MINGW))
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# these generic variables are initialized from the project info
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set (current "${${name}_VERSION_MAJOR}")
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set (age "${${name}_VERSION_MINOR}")
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set (inherited_linker_flags "${${name}_LINKER_FLAGS}")
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set (dependency_libs "${${name}_LIBRARIES}")
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# if we are going to put these in regexps, we must escape period
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string (REPLACE "." "\\." esc_dl_pref "${CMAKE_SHARED_LIBRARY_PREFIX}")
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string (REPLACE "." "\\." esc_dl_suff "${CMAKE_SHARED_LIBRARY_SUFFIX}")
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string (REPLACE "." "\\." esc_ar_pref "${CMAKE_STATIC_LIBRARY_PREFIX}")
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string (REPLACE "." "\\." esc_ar_suff "${CMAKE_STATIC_LIBRARY_PREFIX}")
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# CMake loves absolute paths, whereas libtool won't have any of it!
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# (you get an error message about argument not parsed). translate each
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# of the libraries into a linker option
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set (deplib_list "")
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foreach (deplib IN LISTS dependency_libs)
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# starts with a hyphen already? then just add it
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string (SUBSTRING ${deplib} 0 1 dash)
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if (${dash} STREQUAL "-")
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list (APPEND deplib_list ${deplib})
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else (${dash} STREQUAL "-")
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# otherwise, parse the name into a directory and a name
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get_filename_component (deplib_dir ${deplib} PATH)
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get_filename_component (deplib_orig ${deplib} NAME)
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string (REGEX REPLACE
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"^${esc_dl_pref}(.*)${esc_dl_suff}$"
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"\\1"
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deplib_name
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${deplib_orig}
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)
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string (REGEX REPLACE
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"^${esc_ar_pref}(.*)${esc_ar_suff}$"
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"\\1"
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deplib_name
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${deplib_name}
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)
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# directory and name each on their own; this is somewhat
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# unsatisfactory because it may be that a system dir is specified
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# by an earlier directory and you start picking up libraries from
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# there instead of the "closest" path here. also, the soversion
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# is more or less lost. remove system default path, to lessen the
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# chance that we pick the wrong library
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if (NOT ((deplib_dir STREQUAL "/usr/lib") OR
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(deplib_dir STREQUAL "/usr/${CMAKE_INSTALL_LIBDIR}")))
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list (APPEND deplib_list "-L${deplib_dir}")
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endif (NOT ((deplib_dir STREQUAL "/usr/lib") OR
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(deplib_dir STREQUAL "/usr/${CMAKE_INSTALL_LIBDIR}")))
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# if there was no translation of the name, the library is named
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# unconventionally (.so.3gf, I'm looking at you), so pass this
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# name unmodified to the linker switch
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if (deplib_orig STREQUAL deplib_name)
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list (APPEND deplib_list "-l:${deplib_orig}")
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else (deplib_orig STREQUAL deplib_name)
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list (APPEND deplib_list "-l${deplib_name}")
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endif (deplib_orig STREQUAL deplib_name)
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endif (${dash} STREQUAL "-")
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endforeach (deplib)
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set (dependency_libs ${deplib_list})
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# convert from CMake list (i.e. semi-colon separated)
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string (REPLACE ";" " " inherited_linker_flags "${inherited_linker_flags}")
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string (REPLACE ";" " " dependency_libs "${dependency_libs}")
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# this is the preferred installation path
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set (libdir "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
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# ${name}_LIBRARY_TYPE is either SHARED or STATIC
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if (${name}_LIBRARY_TYPE STREQUAL "SHARED")
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set (libprefix "${CMAKE_SHARED_LIBRARY_PREFIX}")
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set (libsuffix "${CMAKE_SHARED_LIBRARY_SUFFIX}")
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set (libname "${CMAKE_SHARED_LIBRARY_PREFIX}${target}${CMAKE_SHARED_LIBRARY_SUFFIX}")
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# only Unix has soversion in library names
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if (UNIX)
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set (dlname "${libname}.${current}")
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set (library_names "${libname}.${current}.${age} ${libname}.${current} ${libname}")
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else (UNIX)
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set (dlname "${libname}")
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set (library_names "${libname}")
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endif (UNIX)
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set (old_library "")
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else (${name}_LIBRARY_TYPE STREQUAL "SHARED")
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set (dlname "")
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set (library_names "")
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set (old_library "${CMAKE_STATIC_LIBRARY_PREFIX}${target}${CMAKE_STATIC_LIBRARY_SUFFIX}")
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endif (${name}_LIBRARY_TYPE STREQUAL "SHARED")
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# get the version of libtool installed on the system; this is
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# necessary because libtool checks that the file contains its own
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# signature(!)
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if (NOT libtool_MAIN)
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find_file (
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libtool_MAIN
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ltmain.sh
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PATHS /usr
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PATH_SUFFIXES share/libtool/config/
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DOC "Location of libtool"
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)
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mark_as_advanced (libtool_MAIN)
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# notify the user if it not found after we explicitly searched
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if (NOT libtool_MAIN)
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message (STATUS "Libtool not found!")
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endif (NOT libtool_MAIN)
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endif (NOT libtool_MAIN)
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if (libtool_MAIN)
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file (STRINGS
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${libtool_MAIN}
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ltversion_STRING
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REGEX "^VERSION=\".*\""
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)
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endif (libtool_MAIN)
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if (ltversion_STRING)
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string (REGEX REPLACE
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"^VERSION=\"(.*)\""
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"\\1"
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ltversion
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${ltversion_STRING}
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)
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endif (ltversion_STRING)
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# only write an .la if libtool is found; otherwise we have no use
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# for it.
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if (ltversion)
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message (STATUS "Writing libtool archive for ${target}")
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configure_file (
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${PROJECT_SOURCE_DIR}/la.in
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${CMAKE_ARCHIVE_OUTPUT_DIRECTORY}/lib${target}.la
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@ONLY@
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)
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endif (ltversion)
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endfunction (configure_la target)
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41
la.in
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41
la.in
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@ -0,0 +1,41 @@
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# lib@target@.la - a libtool library file
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# Generated by libtool (GNU libtool) @ltversion@
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#
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# Please DO NOT delete this file!
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# It is necessary for linking the library.
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# The name that we can dlopen(3).
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dlname='@dlname@'
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# Names of this library.
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library_names='@library_names@'
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# The name of the static archive.
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old_library='@old_library@'
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# Linker flags that can not go in dependency_libs.
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inherited_linker_flags='@inherited_linker_flags@'
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# Libraries that this one depends upon.
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dependency_libs='@dependency_libs@'
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# Names of additional weak libraries provided by this library
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weak_library_names=''
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# Version information for lib@target@.
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current=@current@
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age=@age@
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revision=0
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# Is this an already installed library?
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installed=no
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# Should we warn about portability when linking against -modules?
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shouldnotlink=no
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# Files to dlopen/dlpreopen
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dlopen=''
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dlpreopen=''
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# Directory that this library needs to be installed in:
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libdir='@libdir@'
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