[dpdk-dev] mk: allow application to override clean

  From: Stephen Hemminger <shemming@brocade.com>

In some cases application may want to have additional rules
for clean. This can be handled by allowing the double colon
form of rule.

 https://www.gnu.org/software/make/manual/html_node/Double_002dColon.html

Single colon and double colon rules for same target causes
an error.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
  

> In some cases application may want to have additional rules
> for clean. This can be handled by allowing the double colon
> form of rule.
> 
>  https://www.gnu.org/software/make/manual/html_node/Double_002dColon.html
> 
> Single colon and double colon rules for same target causes
> an error.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

I think this need could also be solved by having a pkgconfig-like file
and not using this rte.app.mk.

Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>

Applied, despite wrong formatting of the patch

Thanks
  

Hi Stephen,

On 01/23/2015 07:19 AM, stephen@networkplumber.org wrote:
> From: Stephen Hemminger <shemming@brocade.com>
>
> In some cases application may want to have additional rules
> for clean. This can be handled by allowing the double colon
> form of rule.
>
>   https://www.gnu.org/software/make/manual/html_node/Double_002dColon.html

There is already a way to do that in dpdk makefiles: you can add
the following code in your application Makefile, before the line
that includes $(RTE_SDK)/mk/rte.app.mk:

POSTCLEAN += my_clean

.PHONY: my_clean
my_clean:
	@echo executed after clean


Regards,
Olivier
  

Hi Stephen,

2015-01-28 12:00, Olivier MATZ:
> Hi Stephen,
> 
> On 01/23/2015 07:19 AM, stephen@networkplumber.org wrote:
> > From: Stephen Hemminger <shemming@brocade.com>
> >
> > In some cases application may want to have additional rules
> > for clean. This can be handled by allowing the double colon
> > form of rule.
> >
> >   https://www.gnu.org/software/make/manual/html_node/Double_002dColon.html
> 
> There is already a way to do that in dpdk makefiles: you can add
> the following code in your application Makefile, before the line
> that includes $(RTE_SDK)/mk/rte.app.mk:
> 
> POSTCLEAN += my_clean
> 
> .PHONY: my_clean
> my_clean:
> 	@echo executed after clean

Does it fit with your needs?
Should we revert your patch? Double-colon rules were avoided in DPDK.
"Double-colon rules are somewhat obscure and not often very useful"
  

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thomas Monjalon
> Sent: Thursday, January 29, 2015 10:52 AM
> To: stephen@networkplumber.org
> Cc: dev@dpdk.org; Stephen Hemminger
> Subject: Re: [dpdk-dev] [PATCH] mk: allow application to override clean
> 
> Should we revert your patch? Double-colon rules were avoided in DPDK.
> "Double-colon rules are somewhat obscure and not often very useful"

Hi,

Also, it looks like DPDK applications that had a 'make clean' target, like dpdk-pktgen, now need to change it to a double colon target to avoid a make error like this:

    $ cd pktgen-dpdk/
    $ make
    /tmp/dpdk/mk/rte.app.mk:331: *** target file `clean' has both : and :: entries.  Stop.

This is complaining that the local pktgen 'clean:' rule conflicts with the DPDK 'clean::' rule.

John.
--
  

2015-01-29 22:36, Stephen Hemminger:
> On Thu, 29 Jan 2015 02:52:45 -0800
> Thomas Monjalon <thomas.monjalon@6wind.com> wrote:
> 
> > Hi Stephen,
> > 
> > 2015-01-28 12:00, Olivier MATZ:
> > > Hi Stephen,
> > > 
> > > On 01/23/2015 07:19 AM, stephen@networkplumber.org wrote:
> > > > From: Stephen Hemminger <shemming@brocade.com>
> > > >
> > > > In some cases application may want to have additional rules
> > > > for clean. This can be handled by allowing the double colon
> > > > form of rule.
> > > >
> > > >   https://www.gnu.org/software/make/manual/html_node/Double_002dColon.html
> > > 
> > > There is already a way to do that in dpdk makefiles: you can add
> > > the following code in your application Makefile, before the line
> > > that includes $(RTE_SDK)/mk/rte.app.mk:
> > > 
> > > POSTCLEAN += my_clean
> > > 
> > > .PHONY: my_clean
> > > my_clean:
> > > 	@echo executed after clean
> > 
> > Does it fit with your needs?
> > Should we revert your patch? Double-colon rules were avoided in DPDK.
> > "Double-colon rules are somewhat obscure and not often very useful"
> > 
> 
> Works for me.

So the commit is now reverted:
	http://dpdk.org/browse/dpdk/commit/?id=785e1a0932b67136