libtool--gary--1.0--patch-26..27

[Gary V. Vaughan]

Tree version:   address@hidden/libtool--devo--1.0
CVSROOT:        /cvsroot/libtool
TIMESTAMP:       1.1514 2004/07/15 12:14:43
Module name:    /cvsroot/libtool/libtool
Changes by:     address@hidden

Log Message:
        
        This pervasive changeset makes two intertwined deep changes to the
        operation of libtool (neither would work alone).  First, there is
        a new feature that allows libraries to preopen modules.  This
        entails a backwards incompatible change to the libltdl API for
        separating out the preloaded symbol lists by owner.  Second, in
        the tradition of "eating our own dogfood", libltdl now preloads
        its own dlloaders.  The internal API for dlloaders has also had to
        change in a backwards incompatible way in support of the new
        library preloading feature.  If you don't use preloaded libraries,
        you needn't change your project sources, though you will need to
        recompile against the new libltdl.  The API changes are mostly
        confined to dlloaders, so you probably needn't worry about those
        (unless you have written a custom loader that you want libltdl to
        use):
        
        * configure.ac (AC_CONFIG_FILES): Add libltdl/loaders/Makefile.
        * libltdl/configure.ac (AC_CONFIG_FILES): Add loaders/Makefile.
        * libltdl/loaders: New directory for module loaders, to simplify
        Makefile rules, and to give the loaders themselves names that are
        unique in the first few characters.
        * libtoolize.in (func_copy_all_files): Copy recursively to pick up
        the loaders directory contents.
        * libltdl/loaders/Makefile.am: New file.  Move module building
        rules to here...
        * libltdl/Makefile.am: ...from here.
        (VERSION_INFO): Bumped version info to signify interface changes.
        (libltdl_la_CPPFLAGS, libltdlc_la_CPPFLAGS): Set LTDLOPEN
        appropriately for each library.
        * libltdl/loader-dld_link.c, libltdl/loader-dlopen.c,
        libltdl/loader-dyld.c, libltdl/loader-load_add_on.c,
        libltdl/loader-loadlibrary.c libltdl/loader-preopen.c,
        libltdl/loader-shl_load.c: Moved from here...
        * libltdl/loaders/dld_link.c, libltdl/loaders/dlopen.c,
        libltdl/loaders/dyld.c, libltdl/loaders/load_add_on.c,
        libltdl/loaders/loadlibrary.c libltdl/loaders/preopen.c,
        libltdl/loaders/shl_load.c: ...to here.
        (get_vtable): New entry function for each.
        * libltdl/loaders/preopen.c (lt_dlsymlists_t): Replaced by...
        (symlist_chain): ...a new structure which maps lists of preloaded
        symbols from the object that loads them.
        (lt_dlpreload_open): New function to automatically open all
        preloaded modules belonging to a named object (ORIGINATOR).
        * libltdl/lt__alloc.c (lt__zalloc): New function to return a block
        of zeroed out new memory.
        * libltdl/lt__alloc.h (lt__zalloc): Prototype it.
        * libltdl/lt__private.h (lt__alloc_die_callback): Add missing
        prototype.
        (lt__error_strings): Make this opaque to callers.
        * libltdl/lt_error.c (lt__error_strings): Move the implementation
        to here.
        * libltdl/lt_dlloader.h (lt_user_dlloader): Add extra fields to
        make originator focused preloading possible.  *BREAKS BACKWARDS
        COMPATIBILITY*
        (lt_dlloader_add): Take advantage of new fields to simplify
        paramater list.
        * libltdl/lt_system.h (LT_STR): New ANSI stringification macro.
        (LT_CONC): Fix it to work from within macros.
        * libltdl/ltdl.c (loader_init, loader_init_callback): Simplify
        dlloader loading.
        (get_vtable, preloaded_symbols): Point these at the preopen.c
        symbols to bootstrap the loader chain.
        (lt_dlinit): Load the preopen dlloader manually, and then use it
        to load any other preloaded dlloaders.
        (lt_dlloader_add): Simplify parameter list. Populate new
        fields. Chain new loaders according to priority field.
        * libltdl/ltdl.h (lt_dlsymlist): Add a new originator field.
        (lt_dlpreload_callback_func): Type of a callback for automatic
        lt_dlpreload_open loading.
        (LTDL_SET_PRELOADED_SYMBOLS): Adjust to hook into preloaded
        symbols from the "@PROGRAM@" originator.
        * tests/demo/dlmain.c (main): Use mangled preloaded_symbols symbol.
        * tests/pdemo/longer_file_name_dlmain.c (main): Ditto.
        * ltmain.in: Don't spew spurious warnings when dlopening and
        dlpreopening modules.
        (func_generate_dlsyms): Factored out from multiple copies in the
        rest of the code. Generate originator keyed symbol lists.
        (func_extract_archives): Also factored.  Extract the contents of
        convenience archives for linking with dependent libraries when
        --whole-archive is not available.
        [darwin]: Don't try to link $old_library unless it exists, and
        $lib is a bundle.
        * m4/ltdl.m4 (AC_LTDL_DLLIB): Check for all possible dynamic
        loading libraries/apis rather that stopping when an acceptable one
        is discovered.
        (LT_DLLOADERS): New variable for holding dlloaders that can be
        preloaded.
        * doc/libtool.texi: Document interface changes.
        * NEWS: Updated.
-- 
Gary V. Vaughan      ())_.  address@hidden,gnu.org}
Research Scientist   ( '/   http://tkd.kicks-ass.net
GNU Hacker           / )=   http://www.gnu.org/software/libtool
Technical Author   `(_~)_   http://sources.redhat.com/autobook
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