Re: [Xen-devel] [PATCH] libxl: Fix building libxlu_cfg_y.y with bison 3.0

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2014-12-02 at 09:49 -0800, Ed Swierk wrote:
> On Tue, Dec 2, 2014 at 6:00 AM, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> 
> wrote:
> > The automatically generating doesn't actually work.  Depending on the
> > relative timestamps caused by a SCM checkout, or a tarball extraction,
> > the files will be attempted to be regenerated.
> >
> > These files are regenerated in the XenServer build, simply because of
> > their order in the archived tarball.
> 
> When I clone the xen tree from git, the timestamps match about 95% of
> the time, but the 5% failure rate was annoying enough that I finally
> dug in to fix the parser build.
> 
> IMHO the generated files should be omitted from the source tree; as
> long as the source files are actually buildable, there's no reason not
> to treat them like any other source file.

There was a point in time where the prevailing version of bison (or
maybe flex) in stable distro releases had a bug which meant these files
could not be regenerated easily on common distros. I don't recall the
details well enough to know if that time has now passed. Perhaps Ian J
does.

Ian.


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