Re: [PATCH] mk: allow exec-env specific targets

[Jerin Jacob <jerin.jacob@caviumnetworks.com>]

-----Original Message-----
> Date: Tue, 6 Jun 2017 13:20:42 +0530
> From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> To: Thomas Monjalon <thomas@monjalon.net>
> Cc: dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH] mk: allow exec-env specific targets
> User-Agent: Mutt/1.8.3 (2017-05-23)
> 
> -----Original Message-----
> > Date: Tue, 06 Jun 2017 09:16:34 +0200
> > From: Thomas Monjalon <thomas@monjalon.net>
> > To: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> > Cc: dev@dpdk.org
> > Subject: Re: [dpdk-dev] [PATCH] mk: allow exec-env specific targets
> > 
> > 06/06/2017 09:02, Jerin Jacob:
> > > From: Thomas Monjalon <thomas@monjalon.net>
> > > > 06/06/2017 08:36, Jerin Jacob:
> > > > > Add a hook in generic rte.sdkbuild.mk file
> > > > > to include exec-env specific targets.
> > > > > 
> > > > > Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> > > > > ---
> > > > > Useful in integrating some custom targets in nonstandard execution environments.
> > > > > For example, a bare-metal-simulator exec execution environment may need
> > > > > a target to run the dpdk applications.
> > > > > ---
> > > > 
> > > > This patch is just including an empty file.
> > > 
> > > Do you like to add check for the file is present or not ? and if present,
> > > invoke the file.
> > 
> > The dash prefixing does the check:
> > -include
> 
> OK
> 
> > 
> > > > Please explain how it can help with a real example.
> > > 
> > > We are evaluating on running DPDK on a nonstandard execution environment like
> > > bare metal where I would to keep all my execution environment specific
> > > change at following location. So that I can easy move around different
> > > version of DPDK without merge conflict.
> > > 
> > > $(RTE_SDK)mk/exec-env/my-exec-env
> > > $(RTE_SDK)lib/librte_eal/my-exec-env
> > > 
> > > I believe, The existing target like "exec-env-appinstall" in mk/exec-env/linuxapp/rte.app.mk,
> > > solves the same purpose.
> > 
> > I do not understand.
> > If you want to add a new environment, why not just adding it?
> 
> I do not understand it either. In exiting makefile infrastructure,
> How do you add an exec environment specific target(s) with out changing
> the common code?

As disucssed in IRC, I will send the v2 with following changes,
- Change mk/exec-env/$(RTE_EXEC_ENV)/rte.extra.mk to
mk/exec-env/$(RTE_EXEC_ENV)/rte.custom.mk
- Remove empty files and include through -include

> 
> >