linux-kernel - Re: [PATCH] selftests: net: use LDLIBS instead of LDFLAGS to link against libnuma

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Date:   Wed, 28 Jun 2017 17:36:28 +0300
From:   Fathi Boudra <fathi.boudra@...aro.org>
To:     Shuah Khan <shuah@...nel.org>
Cc:     linux-kselftest@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        SeongJae Park <sj38.park@...il.com>
Subject: Re: [PATCH] selftests: net: use LDLIBS instead of LDFLAGS to link
 against libnuma

On 28 June 2017 at 17:19, Shuah Khan <shuah@...nel.org> wrote:
> On 06/28/2017 05:19 AM, Fathi Boudra wrote:
>> reuseport_bpf_numa fails to build with undefined reference:
>>
>>  aarch64-linaro-linux-gcc
>>  --sysroot=/build/tmp-rpb-glibc/sysroots/hikey -Wall
>>  -Wl,--no-as-needed -O2 -g -I../../../../usr/include/  -Wl,-O1
>>  -Wl,--hash-style=gnu -Wl,--as-needed -lnuma  reuseport_bpf_numa.c
>>  -o
>>  /build/tmp-rpb-glibc/work/hikey-linaro-linux/kselftests/4.12-r0/linux-4.12-rc7/tools/testing/selftests/net/reuseport_bpf_numa
>>  /tmp/ccfUuExT.o: In function `send_from_node':
>>  /build/tmp-rpb-glibc/work/hikey-linaro-linux/kselftests/4.12-r0/linux-4.12-rc7/tools/testing/selftests/net/reuseport_bpf_numa.c:138:
>>  undefined reference to `numa_run_on_node'
>>  /tmp/ccfUuExT.o: In function `main':
>>  /build/tmp-rpb-glibc/work/hikey-linaro-linux/kselftests/4.12-r0/linux-4.12-rc7/tools/testing/selftests/net/reuseport_bpf_numa.c:230:
>>  undefined reference to `numa_available'
>>  /build/tmp-rpb-glibc/work/hikey-linaro-linux/kselftests/4.12-r0/linux-4.12-rc7/tools/testing/selftests/net/reuseport_bpf_numa.c:233:
>>  undefined reference to `numa_max_node'
>>
>> Use LDLIBS instead of LDFLAGS to properly link against libnuma.
>>
>> Signed-off-by: Fathi Boudra <fathi.boudra@...aro.org>
>
> Did you try this on linux-ksefltest next? It has the fix for this.

yes, I tried linux-ksefltest next and can reproduce.

> thanks,
> -- Shuah
>> ---
>>  tools/testing/selftests/net/Makefile | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
>> index 35cbb4cba410..17c732a19c4c 100644
>> --- a/tools/testing/selftests/net/Makefile
>> +++ b/tools/testing/selftests/net/Makefile
>> @@ -3,7 +3,7 @@
>>  CFLAGS =  -Wall -Wl,--no-as-needed -O2 -g
>>  CFLAGS += -I../../../../usr/include/
>>
>> -reuseport_bpf_numa: LDFLAGS += -lnuma
>> +reuseport_bpf_numa: LDLIBS += -lnuma
>>
>>  TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh
>>  TEST_GEN_FILES =  socket