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bpf: Check CONFIG_BPF option for resolve_btfids

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Currently all the resolve_btfids 'users' are under CONFIG_BPF
code, so if we have CONFIG_BPF disabled, resolve_btfids will
fail, because there's no data to resolve.

Disabling resolve_btfids if there's CONFIG_BPF disabled,
so we won't fail such builds.

Suggested-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200923185735.3048198-1-jolsa@kernel.org
This commit is contained in:
Jiri Olsa 2020-09-23 20:57:34 +02:00 committed by Alexei Starovoitov
parent 0789e13bc3
commit 017dab341e
2 changed files with 6 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
Makefile
View file

@ -1084,13 +1084,15 @@ ifdef CONFIG_STACK_VALIDATION
endif
endif
ifdef CONFIG_BPF
ifdef CONFIG_DEBUG_INFO_BTF
ifeq ($(has_libelf),1)
resolve_btfids_target := tools/bpf/resolve_btfids FORCE
else
ERROR_RESOLVE_BTFIDS := 1
endif
endif
endif # CONFIG_DEBUG_INFO_BTF
endif # CONFIG_BPF
PHONY += prepare0

6
scripts/link-vmlinux.sh
View file

@ -341,9 +341,9 @@ fi
vmlinux_link vmlinux "${kallsymso}" ${btf_vmlinux_bin_o}
# fill in BTF IDs
if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then
info BTFIDS vmlinux
${RESOLVE_BTFIDS} vmlinux
if [ -n "${CONFIG_DEBUG_INFO_BTF}" -a -n "${CONFIG_BPF}" ]; then
info BTFIDS vmlinux
${RESOLVE_BTFIDS} vmlinux
fi
if [ -n "${CONFIG_BUILDTIME_TABLE_SORT}" ]; then