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 >
