special tool versions to build egcs

[N8TM@aol.com]

In a message dated 10/15/98 1:09:50 AM Pacific Daylight Time,
nix@esperi.demon.co.uk writes:

> bison and a lex are needed, but I'm not sure if the lex must be flex or not.
>  
AFAIK bison is needed primarily to install flex, if that is needed.  To take
hpux10.20 as an example, if the vendor's extra-cost "ANSI C" is installed, it
brings a full lex installation which satifies egcs.  If not, the existence of
libl causes egcs to mis-configure on the assumption that lex is also present.
Installing flex (which in turn requires bison) fixes that.