Thu Dec  5 16:05:55 2002  Owen Taylor  <otaylor@redhat.com>

        * configure.in: Use AC_LINK_IFELSE(), not AC_TRY_RUN()
        for va_copy(), __va_copy() checks.

        * configure.in: When there is a reasonable default,
        provide that in the 3rd argument of AC_TRY_RUN(),
        instead of just leaving the 3rd argument empty.