* libtool.m4 (AC_LIBTOOL_PROG_CC_C_O): use printf, not

* libtool.m4 (AC_LIBTOOL_PROG_CC_C_O): use printf, not
echo. (AC_DEPLIBS_CHECK_METHOD): use new shell function
win32_libid on w32 platforms
* ltmain.in: add new section for shell functions. Add
win32_libid() shell function.
* f77demo/Makefile.am: add -no-undefined flag

* ltdl.c (realloc): Remove custom realloc. (#define
rpl_realloc realloc) and comment out later code for custom
realloc. You can't define your own malloc unless you know
enough about the malloc in use to be able to tell how big
the src ptr is. The disabled code incorrectly used the
*destination* ptr to decide how much to copy. This
sometimes results in out-of-bound accesses which cause
segfaults. This is a quick hack for now; we may want
something cleaner later. (tryall_dlopen_module): check to
be sure (dirname_len > 0) before testing first character
against '/'. (try_dlopen): check for feof(file) in read
loop -- otherwise infloop?