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
next 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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