Hi Shuah
On 24/09/2019 16:26, Shuah Khan wrote:
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/
side question, since I'm writing arm64/ tests.
my "build-testcases" following the KSFT docs are:
make kselftest make TARGETS=arm64 kselftest make -C tools/testing/selftests/ make -C tools/testing/selftests/ INSTALL_PATH=<install-path> install make TARGETS=arm64 -C tools/testing/selftests/ make TARGETS=arm64 -C tools/testing/selftests/ INSTALL_PATH=<install-path> install ./kselftest_install.sh <install-path>
(and related clean targets...)
but definitely NOT
make -C tools/testing/selftests/arm64
(for simplicity....due to the subdirs structure under tools/testing/selftests/arm64/)
am I wrong ?
Thanks
Cristian
-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