> On Nov 24, 2020, at 11:51 AM, Jiri Olsa <[email protected]> wrote:
>
> On Wed, Nov 18, 2020 at 08:50:45PM -0800, Song Liu wrote:
>
> SNIP
>
>> +
>> +$(TMP_OUTPUT):
>> + $(call msg,MKDIR,$@)
>> + $(Q)mkdir -p $(TMP_OUTPUT)
>> +
>> +$(TMP_OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(TMP_OUTPUT) $(BPFTOOL)
>> + $(call msg,GEN,$@)
>> + $(Q)if [ ! -e "$(VMLINUX_BTF_PATH)" ] ; then \
>> + echo "Couldn't find kernel BTF; set VMLINUX_BTF to" \
>> + "specify its location." >&2; \
>> + exit 1;\
>> + fi
>> + $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF_PATH) format c > $@
>> +
>> +$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) |
>> $(TMP_OUTPUT)
>> + $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) \
>> + OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
>> +
>> +$(DEFAULT_BPFTOOL): | $(TMP_OUTPUT)
>> + $(Q)$(MAKE) $(submake_extras) -C ../../../bpf/bpftool \
>> + prefix= OUTPUT=$(TMP_OUTPUT)/ DESTDIR=$(TMP_OUTPUT) install
>
> could we build just the bootstrap version of bpftool?
> should be enough for skeleton and vmlinux.h dump, no?
>
Yeah, that should work. I thought about it, but didn't try that hard.
Song
