es directly.
* libltdl is no longer a self-contained package, and shares configury with
  the top level directory now.
* Shared objects (.lo) are no longer created when '-static' is passed in
  compile mode.
* New compile mode option '-shared' prevents creation of static objects (.o).
* New link mode option '-shared' creates only shared libraries at link time.
* If you configure libtool with --disable-shared (or if libtool does not
  support shared libraries on your platform) trying to build a library using
  '-shared' is a fatal error.
* New link mode option '-weak' tells libtool when not to propagate dependency
  libraries from dlpreopened modules.
* libtoolize installs libtool.m4, (ltdl.m4 if used,) and various supporting
  m4 definitions to AC_CONFIG_MACRO_DIR.
* Mode inferrence removed, shorthand for choosing modes added.
* Specifying -allow-undefined is now an error.
* Speed up max_cmd_len check.
* libltdl can now preopen modules from within a library, and libtool will
  accept -dlpreopen options when linking either a shared library or a
  convenience library.
* New function in libltdl: lt_dlhandle_find provides access to module handles
  by module name.
* New function in libltdl: lt_dlpreload_open opens all preloaded modules.
* libltdl no longer loads shared libraries with global symbol resolution,
  this caused problems when the symbols were intended to be overriden further
  up the stack; it is also not recommended practice.
* New function in libltdl: lt_dlhandle_first, primes handle iterations (using
  lt_dlhandle_next) to filter by module interface.
* libltdl no longer tries to support multi-threaded programming with
  lt_dlmutex_register(), which was unusable with POSIX threads anyway.
  The symbols are deprecated but exported for backwards compatibility.
* libltdl no longer uses lt_dlmalloc, lt_dlrealloc and lt_dlfree.  The symbols
  are still exported for backwards compatibility.
* The lt_dlinfo struct has a new module field that can be used by dlloaders.
* libltdl no longer supports pre-c89 compilers.  Some of the pre89 portability
  functions had compile time bugs in them anyway, so you guys can't have been
  using it :-)
* make install now deletes preexisting $prefix/share/libtool before installing
  latest files.
* Extracting symbols from an import library on cygwin and win32 now works.
* Initial support for amigaos-ppc.
* Improved support for OpenBSD.
* Support for Intel C++ version 8.0.
* New support for IBM's xlc and xlc++ on Mac OS X.
* Finished support for QNX RTOS.
* Bug fixes.