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From: Shuah Khan <skhan@linuxfoundation.org>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
	Daniel Borkmann <daniel@iogearbox.net>
Cc: "open list:KERNEL SELFTEST FRAMEWORK" 
	<linux-kselftest@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
	Networking <netdev@vger.kernel.org>,
	"David S. Miller" <davem@davemloft.net>
Subject: Linux 5.4 - bpf test build fails
Date: Tue, 24 Sep 2019 09:26:16 -0600	[thread overview]
Message-ID: <742ecabe-45ce-cf6e-2540-25d6dc23c45f@linuxfoundation.org> (raw)

Hi Alexei and Daniel,

bpf test doesn't build on Linux 5.4 mainline. Do you know what's
happening here.


make -C tools/testing/selftests/bpf/

-c progs/test_core_reloc_ptr_as_arr.c -o - || echo "clang failed") | \
llc -march=bpf -mcpu=generic  -filetype=obj -o 
/mnt/data/lkml/linux_5.4/tools/testing/selftests/bpf/test_core_reloc_ptr_as_arr.o
progs/test_core_reloc_ptr_as_arr.c:25:6: error: use of unknown builtin
       '__builtin_preserve_access_index' [-Wimplicit-function-declaration]
         if (BPF_CORE_READ(&out->a, &in[2].a))
             ^
./bpf_helpers.h:533:10: note: expanded from macro 'BPF_CORE_READ'
                        __builtin_preserve_access_index(src))
                        ^
progs/test_core_reloc_ptr_as_arr.c:25:6: warning: incompatible integer to
       pointer conversion passing 'int' to parameter of type 'const void *'
       [-Wint-conversion]
         if (BPF_CORE_READ(&out->a, &in[2].a))
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./bpf_helpers.h:533:10: note: expanded from macro 'BPF_CORE_READ'
                        __builtin_preserve_access_index(src))
                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning and 1 error generated.
llc: error: llc: <stdin>:1:1: error: expected top-level entity
clang failed

Also

make TARGETS=bpf kselftest fails as well. Dependency between
tools/lib/bpf and the test. How can we avoid this type of
dependency or resolve it in a way it doesn't result in build
failures?

thanks,
-- Shuah

             reply	other threads:[~2019-09-24 15:26 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-24 15:26 Shuah Khan [this message]
2019-09-24 15:43 ` Linux 5.4 - bpf test build fails Yonghong Song
2019-09-24 15:48   ` Shuah Khan
2019-09-24 18:49     ` Daniel Borkmann
2019-09-24 18:56       ` Shuah Khan
2019-09-24 19:19         ` Daniel Borkmann
2019-09-24 19:48           ` Shuah Khan
2019-09-24 15:52 ` Cristian Marussi
2019-09-24 16:03   ` Shuah Khan
2019-09-24 16:39     ` Shuah Khan
2019-09-24 17:29       ` Cristian Marussi
2019-09-24 18:07         ` Tim.Bird
2019-09-24 18:23           ` Shuah Khan
2019-09-25  8:52             ` Cristian Marussi

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