[dpdk-dev] How to include pre-build object file (.o) in DPDK makefile?
Lu, Patrick
patrick.lu at intel.com
Fri Sep 16 20:30:10 CEST 2016
-----Original Message-----
From: Yigit, Ferruh
Sent: Friday, September 16, 2016 11:05 AM
To: Lu, Patrick <patrick.lu at intel.com>; dev at 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
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