bootstrap/6622: configure should fail if bison is not found

[rth@gcc.gnu.org]

Synopsis: configure should fail if bison is not found

State-Changed-From-To: open->closed
State-Changed-By: rth
State-Changed-When: Thu May 16 18:35:24 2002
State-Changed-Why:
    This is not appropriate for building from release tarballs, which include
    the Bison-generated files so that users don't need Bison installed.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6622