Re: [dpdk-dev] [RFC PATCH] replace DPDK config and build system

[Bruce Richardson <bruce.richardson@intel.com>]

On Tue, Jun 20, 2017 at 03:34:58PM +0200, Morten Brørup wrote:
> FYI: We are using Crosstool-NG (http://crosstool-ng.github.io/). It seems to be quite popular for cross compiling.
> 

How does a tool like that interact with build-systems then - either with
our current one, or with a hypothetical future one using meson+ninja as
below? Does it simplify what needs to be provided in the build config
tool?

/Bruce

> 
> Med venlig hilsen / kind regards
> - Morten Brørup
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Wiles, Keith
> > Sent: Friday, June 9, 2017 8:06 PM
> > To: Richardson, Bruce
> > Cc: Christian Ehrhardt; Stephen Hemminger; dev
> > Subject: Re: [dpdk-dev] [RFC PATCH] replace DPDK config and build
> > system
> > 
> > 
> > > On Jun 9, 2017, at 4:05 AM, Bruce Richardson
> > <bruce.richardson@intel.com> wrote:
> > >
> > > On Thu, Jun 08, 2017 at 12:07:05PM -0600, Christian Ehrhardt wrote:
> > >> On Thu, Jun 8, 2017 at 10:26 AM, Stephen Hemminger <
> > >> stephen@networkplumber.org> wrote:
> > >>
> > >>> On a side note, it would be good to use the GCC extensions that
> > >>> allow building different versions of the same routine into one
> > binary.
> > >>>
> > >>
> > >> And we are back to the discussion we had two years ago about how to
> > >> deliver generic yet also optimized binaries in one shot.
> > >> But if the new build system can enable us to do so I'm all in for
> > that.
> > >>
> > >> Thanks for bringing this up in that context Stephen - might be just
> > >> the right time to look at it again.
> > >>
> > > Yep, we can do that. First though, we need to decide what our minimum
> > > supported compiler baseline is going to be.
> > > Also, if the replace the build system, do we want to do a complete
> > > on-shot replacement, or do we want to keep the older one around in
> > > parallel for a while e.g. to support older OS's and compilers.
> > 
> > I think it would be a good idea to keep the old version for now.
> > 
> > I would suggest adding the new build system to a sandbox repo until we
> > think we have parity then merge into main. Keep the old system in place
> > to allow for other systems until we believe we really have covered all
> > of the bases.
> > 
> > What would your baseline be ?
> > 
> > I would suggest pick a few distros like Linux Ubuntu, Fedora, Red Hat
> > just a guess at the ones we need to support first.
> > 
> > Think we have to support IA and ARM at the same time for the few
> > distros we start with first or at least pick the most used one for ARM
> > first.
> > 
> > >
> > > /Bruce
> > 
> > Regards,
> > Keith
> > 
>