[TUHS] Archaic yacc C grammar

Lars Brinkhoff lars at nocrew.org
Tue Oct 30 18:16:17 AEST 2018

Warner Losh wrote:
> Steve Johnson wrote:
>  We actually had a pretty good system for making changes like
>  that. First, we would change the compiler to accept both the old and
>  the new. Then we would produce a warning that on a particular date
>  the old would no longer work. Then we made the old an error and
>  printed a message about how to fix it.
> How long a transition period did you typically have?

I heard the V7 compiler still supports old B style initialization
"int x 42;".  So in some cases, a really long time.

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