* How to include pre-build object file (.o) in DPDK makefile?
@ 2016-09-16 17:04 Lu, Patrick
2016-09-16 18:05 ` Ferruh Yigit
0 siblings, 1 reply; 4+ messages in thread
From: Lu, Patrick @ 2016-09-16 17:04 UTC (permalink / raw)
To: dev
Hi,
I'm trying to include some hand written assembly (compiled by yasm) in my DPDK program. I couldn't find any example linking the DPDK C code with pre-compiled .o file. I've searched the mk/ and found OBJS-y seems the right variable to include .o file, but when generating the final executable, OBJS-y contains only main.o (generating from main.c).
I've tried to put my .o file in both source directory as well as build/
Thanks,
Patrick
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: How to include pre-build object file (.o) in DPDK makefile?
2016-09-16 17:04 How to include pre-build object file (.o) in DPDK makefile? Lu, Patrick
@ 2016-09-16 18:05 ` Ferruh Yigit
2016-09-16 18:30 ` Lu, Patrick
0 siblings, 1 reply; 4+ messages in thread
From: Ferruh Yigit @ 2016-09-16 18:05 UTC (permalink / raw)
To: Lu, Patrick, dev
On 9/16/2016 6:04 PM, Lu, Patrick wrote:
> Hi,
>
> I'm trying to include some hand written assembly (compiled by yasm) in my DPDK program. I couldn't find any example linking the DPDK C code with pre-compiled .o file. I've searched the mk/ and found OBJS-y seems the right variable to include .o file, but when generating the final executable, OBJS-y contains only main.o (generating from main.c).
>
> I've tried to put my .o file in both source directory as well as build/
>
Possible to use EXTRA_LDLIBS to provide the object file name, and put
object file into build folder.
Following example worked for me:
$ nm foo.o
0000000000000000 T foo
$ cp foo.o examples/skeleton/build/
$ make -C examples/skeleton EXTRA_LDLIBS="foo.o"
make: Entering directory '.../examples/skeleton'
CC basicfwd.o
LD basicfwd
INSTALL-APP basicfwd
INSTALL-MAP basicfwd.map
make: Leaving directory '.../examples/skeleton'
$ nm examples/skeleton/build/basicfwd | grep foo
000000000055fd1d T foo
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: How to include pre-build object file (.o) in DPDK makefile?
2016-09-16 18:05 ` Ferruh Yigit
@ 2016-09-16 18:30 ` Lu, Patrick
2016-09-19 11:38 ` Neil Horman
0 siblings, 1 reply; 4+ messages in thread
From: Lu, Patrick @ 2016-09-16 18:30 UTC (permalink / raw)
To: Yigit, Ferruh, dev
-----Original Message-----
From: Yigit, Ferruh
Sent: Friday, September 16, 2016 11:05 AM
To: Lu, Patrick <patrick.lu@intel.com>; dev@dpdk.org
Subject: Re: [dpdk-dev] How to include pre-build object file (.o) in DPDK makefile?
On 9/16/2016 6:04 PM, Lu, Patrick wrote:
> Hi,
>
> I'm trying to include some hand written assembly (compiled by yasm) in my DPDK program. I couldn't find any example linking the DPDK C code with pre-compiled .o file. I've searched the mk/ and found OBJS-y seems the right variable to include .o file, but when generating the final executable, OBJS-y contains only main.o (generating from main.c).
>
> I've tried to put my .o file in both source directory as well as
> build/
>
Possible to use EXTRA_LDLIBS to provide the object file name, and put object file into build folder.
Following example worked for me:
$ nm foo.o
0000000000000000 T foo
$ cp foo.o examples/skeleton/build/
$ make -C examples/skeleton EXTRA_LDLIBS="foo.o"
make: Entering directory '.../examples/skeleton'
CC basicfwd.o
LD basicfwd
INSTALL-APP basicfwd
INSTALL-MAP basicfwd.map
make: Leaving directory '.../examples/skeleton'
$ nm examples/skeleton/build/basicfwd | grep foo 000000000055fd1d T foo
Perfect! This works for me.
Sincerely,
Patrick
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: How to include pre-build object file (.o) in DPDK makefile?
2016-09-16 18:30 ` Lu, Patrick
@ 2016-09-19 11:38 ` Neil Horman
0 siblings, 0 replies; 4+ messages in thread
From: Neil Horman @ 2016-09-19 11:38 UTC (permalink / raw)
To: Lu, Patrick; +Cc: Yigit, Ferruh, dev
On Fri, Sep 16, 2016 at 06:30:10PM +0000, Lu, Patrick wrote:
> -----Original Message-----
> From: Yigit, Ferruh
> Sent: Friday, September 16, 2016 11:05 AM
> To: Lu, Patrick <patrick.lu@intel.com>; dev@dpdk.org
> Subject: Re: [dpdk-dev] How to include pre-build object file (.o) in DPDK makefile?
>
> On 9/16/2016 6:04 PM, Lu, Patrick wrote:
> > Hi,
> >
> > I'm trying to include some hand written assembly (compiled by yasm) in my DPDK program. I couldn't find any example linking the DPDK C code with pre-compiled .o file. I've searched the mk/ and found OBJS-y seems the right variable to include .o file, but when generating the final executable, OBJS-y contains only main.o (generating from main.c).
> >
> > I've tried to put my .o file in both source directory as well as
> > build/
> >
>
> Possible to use EXTRA_LDLIBS to provide the object file name, and put object file into build folder.
>
> Following example worked for me:
>
> $ nm foo.o
> 0000000000000000 T foo
>
> $ cp foo.o examples/skeleton/build/
>
> $ make -C examples/skeleton EXTRA_LDLIBS="foo.o"
> make: Entering directory '.../examples/skeleton'
> CC basicfwd.o
> LD basicfwd
> INSTALL-APP basicfwd
> INSTALL-MAP basicfwd.map
> make: Leaving directory '.../examples/skeleton'
>
> $ nm examples/skeleton/build/basicfwd | grep foo 000000000055fd1d T foo
>
> Perfect! This works for me.
>
Just out of curiosity, why not just specify the source file in SRCS-y for your
target binary? rte.pre-compile.mk has an assembly target for .S->.o
transitions.
Neil
> Sincerely,
>
> Patrick
>
>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2016-09-19 11:38 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2016-09-16 17:04 How to include pre-build object file (.o) in DPDK makefile? Lu, Patrick
2016-09-16 18:05 ` Ferruh Yigit
2016-09-16 18:30 ` Lu, Patrick
2016-09-19 11:38 ` Neil Horman
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