Re: [Xen-devel] bison/flex version requirements

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 13.05.13 at 16:52, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> wrote:
> Jan Beulich writes ("Re: [Xen-devel] bison/flex version requirements"):
>>On 13.05.13 at 16:10, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
>> > $ bison --version
>> > bison (GNU Bison) 2.4.1
>> > $ flex --version
>> > flex 2.5.35
>> > 
>> > How does that compare with what you have?
>> 
>> 2.1 and 2.5.31.
> 
> Looking at the changelog for flex:
> 
> We depend on `yylex_init_extra' which was introduced in flex 2.5.34
> released in December 2007.

So minimally the configure script should then actually check for this.

> 2.5.34 also fixes some memory leaks which may be relevant.
> 
> Bison version 2.1 is from February 2006.
> 
> Having read the changelog I think the latest thing we definitely need
> is this:
>         Finish implementation of per-type %destructor/%printer.
> from 2006-09-04, released in version 2.3a, but a user would very
> likely want bugfixes (eg memory leak fixes) that are later than that.

And this (at least via a version check).

Jan


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