[PATCH v4 1/3] bpftool: add Makefile target bootstrap

[Song Liu]

This target is used to only build the bootstrap bpftool, which will be
used to generate bpf skeletons for other tools, like perf.

Signed-off-by: Song Liu <songliubrav...@fb.com>
---
 tools/bpf/bpftool/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile
index f60e6ad3a1dff..b0e5b29a2c10a 100644
--- a/tools/bpf/bpftool/Makefile
+++ b/tools/bpf/bpftool/Makefile
@@ -130,6 +130,8 @@ VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                
                \
                     /boot/vmlinux-$(shell uname -r)
 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 
+bootstrap: $(BPFTOOL_BOOTSTRAP)
+
 ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
 ifeq ($(feature-clang-bpf-co-re),1)
 
-- 
2.24.1