On 11/9/20 12:07 AM, Hangbin Liu wrote: > diff --git a/lib/bpf_glue.c b/lib/bpf_glue.c > new file mode 100644 > index 00000000..7626a893 > --- /dev/null > +++ b/lib/bpf_glue.c ... > + > +int bpf_program_load(enum bpf_prog_type type, const struct bpf_insn *insns, > + size_t size_insns, const char *license, char *log, > + size_t size_log) > +{ > +#ifdef HAVE_LIBBPF > + return bpf_load_program(type, insns, size_insns, license, 0, log, size_log); > +#else > + return bpf_load_load_dev(type, insns, size_insns, license, 0, log, size_log); > +#endif > +} > + Fails to compile: $ LIBBPF_FORCE=off ./configure $ make ... /usr/bin/ld: ../lib/libutil.a(bpf_glue.o): in function `bpf_program_load': bpf_glue.c:(.text+0x13): undefined reference to `bpf_load_load_dev' collect2: error: ld returned 1 exit status make[1]: *** [Makefile:27: ip] Error 1 make: *** [Makefile:64: all] Error 2