_LT_AC_PROG_ECHO_BACKSLASH and PATH_SEPARATOR

[Kevin Ryde]

I think _LT_AC_PROG_ECHO_BACKSLASH attempts to use PATH_SEPARATOR
before autoconf has had a chance to set it up, which means the search
through $PATH for a good echo is doomed to failure.

The addition below is a copy of _AS_PATH_SEPARATOR_PREPARE from
autoconf.  I guess it'd be possible to invoke that macro rather than
copying it, but better to stay clear of autoconf internals.

        * libtool.m4 (_LT_AC_PROG_ECHO_BACKSLASH): Ensure PATH_SEPARATOR
        is setup (using code from _AS_PATH_SEPARATOR_PREPARE).

libtool.m4.path-separator.diff
Description: Source code patch