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870f193d48
reuseport_bpf_numa fails to build due to undefined reference errors: 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' It's GNU Make and linker specific. The default Makefile rule looks like: $(CC) $(CFLAGS) $(LDFLAGS) $@ $^ $(LDLIBS) When linking is done by gcc itself, no issue, but when it needs to be passed to proper ld, only LDLIBS follows and then ld cannot know what libs to link with. More detail: https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html LDFLAGS Extra flags to give to compilers when they are supposed to invoke the linker, ‘ld’, such as -L. Libraries (-lfoo) should be added to the LDLIBS variable instead. LDLIBS Library flags or names given to compilers when they are supposed to invoke the linker, ‘ld’. LOADLIBES is a deprecated (but still supported) alternative to LDLIBS. Non-library linker flags, such as -L, should go in the LDFLAGS variable. https://lkml.org/lkml/2010/2/10/362 tools/perf: libraries must come after objects Link order matters, use LDLIBS instead of LDFLAGS to properly link against libnuma. Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org> Signed-off-by: Shuah Khan <shuah@kernel.org>
27 lines
1.1 KiB
Makefile
27 lines
1.1 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# Makefile for net selftests
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CFLAGS = -Wall -Wl,--no-as-needed -O2 -g
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CFLAGS += -I../../../../usr/include/
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TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh \
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rtnetlink.sh xfrm_policy.sh
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TEST_PROGS += fib_tests.sh fib-onlink-tests.sh pmtu.sh udpgso.sh ip_defrag.sh
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TEST_PROGS += udpgso_bench.sh fib_rule_tests.sh msg_zerocopy.sh psock_snd.sh
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TEST_PROGS += udpgro_bench.sh udpgro.sh test_vxlan_under_vrf.sh reuseport_addr_any.sh
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TEST_PROGS += test_vxlan_fdb_changelink.sh
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TEST_PROGS_EXTENDED := in_netns.sh
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TEST_GEN_FILES = socket
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TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy reuseport_addr_any
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TEST_GEN_FILES += tcp_mmap tcp_inq psock_snd txring_overwrite
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TEST_GEN_FILES += udpgso udpgso_bench_tx udpgso_bench_rx ip_defrag
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TEST_GEN_PROGS = reuseport_bpf reuseport_bpf_cpu reuseport_bpf_numa
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TEST_GEN_PROGS += reuseport_dualstack reuseaddr_conflict tls
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KSFT_KHDR_INSTALL := 1
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include ../lib.mk
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$(OUTPUT)/reuseport_bpf_numa: LDLIBS += -lnuma
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$(OUTPUT)/tcp_mmap: LDFLAGS += -lpthread
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$(OUTPUT)/tcp_inq: LDFLAGS += -lpthread
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