* libtool.m4 (_LT_AC_LOCK): remove support for ancient

* libtool.m4 (_LT_AC_LOCK): remove support for ancient
versions of mingw and cygwin.
(AC_LIBTOOL_POSTDEP_PREDEP): new function.
moved the "find hidden library dependencies" code here
from AC_LIBTOOL_LANG_CXX_CONFIG.  Attempted to make it
multi-tag compatible, but currently only CXX calls it.
(AC_LIBTOOL_LANG_CXX_CONFIG): set
enable_shared_with_satic_runtimes to 'no' by default
Set it to 'yes' for cygwin, mingw, pw32. Replace
"find hidden library dependencies" code with a call
to the new function AC_LIBTOOL_POSTDEP_PREDEP.
Consolidate cygwin and mingw/pw32 stanzas.
(AC_LIBTOOL_LANG_F77_CONFIG): set
enable_shared_with_static_runtimes to 'no' by default
(AC_LIBTOOL_CONFIG): add
enable_shared_with_static_runtimes to the list of variables
to write into ltmain.sh; include it in the libtool script
template as allow_libtool_libs_with_static_runtimes.
(AC_LIBTOOL_PROG_LD_SHLIBS): set
enable_shared_with_static_runtimes to 'no' by default
Set it to 'yes' for cygwin, mingw, pw32.
(AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE): only put cr in regexp
if the build_os is mingw, not host_os

* ltmain.in (case deplibs_check_method): for all appropriate
cases, if allow_libtool_libs_with_static_runtimes, then remove
predeps and postdeps from the list of dependencies that must
be checked for "dynamicness".  For the "none" case, the
presence of compiler-generated postdeps and predeps should
not trigger "inter-library dependencies not supported" error.
(initial setup after arg processing): on cygwin/mingw, allow
compiler-generated dependent libs to be duplicated without
elimination.
(initial search loop for deplibs): if the deplib in question
is a libtool lib, then if
allow_libtool_libs_with_static_runtimes then parse the .la file.
If the .la file only has an "old_library", add the deplib
directly to the deplibs list (-lstdc++) and DON'T use the .la
file; this allows the (case deplibs_check_method) change above
to take effect.
* ltmain.in (for pass in $passes loop): remove predeps,
postdeps, and compiler_lib_search_path from dependency_libs.