From 017dab341ee75c0d3675b9b3d28be28d38e6defc Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Wed, 23 Sep 2020 20:57:34 +0200
Subject: [PATCH] bpf: Check CONFIG_BPF option for resolve_btfids
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
---
Makefile | 4 +++-
scripts/link-vmlinux.sh | 6 +++---
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/Makefile b/Makefile
index c4470a4e131f2..b05682eea2c01 100644
--- a/Makefile
+++ b/Makefile
@@ -1084,13 +1084,15 @@ ifdef CONFIG_STACK_VALIDATION
endif
endif
+ifdef CONFIG_BPF
ifdef CONFIG_DEBUG_INFO_BTF
ifeq ($(has_libelf),1)
resolve_btfids_target := tools/bpf/resolve_btfids FORCE
else
ERROR_RESOLVE_BTFIDS := 1
endif
-endif
+endif # CONFIG_DEBUG_INFO_BTF
+endif # CONFIG_BPF
PHONY += prepare0
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index e6e2d9e5ff487..dbde59d343b11 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -341,9 +341,9 @@ fi
vmlinux_link vmlinux "${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
--
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