From: Andrii Nakryiko <andriin@fb.com>
Date: Tue, 21 Jul 2020 21:38:04 -0700
Subject: tools/bpftool: Strip BPF .o files before skeleton generation
Patch-mainline: v5.9-rc1
Git-commit: f3c93a93b564d25cab715cd71a6c3417e77b19f3
References: bsc#1177028
Strip away DWARF info from .bpf.o files, before generating BPF skeletons.
This reduces bpftool binary size from 3.43MB to 2.58MB.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20200722043804.2373298-1-andriin@fb.com
Acked-by: Gary Lin <glin@suse.com>
---
tools/bpf/bpftool/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/tools/bpf/bpftool/Makefile
+++ b/tools/bpf/bpftool/Makefile
@@ -59,6 +59,7 @@ endif
INSTALL ?= install
RM ?= rm -f
CLANG ?= clang
+LLVM_STRIP ?= llvm-strip
FEATURE_USER = .bpftool
FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \
@@ -147,7 +148,7 @@ $(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUT
-I$(srctree)/tools/include/uapi/ \
-I$(LIBBPF_PATH) \
-I$(srctree)/tools/lib \
- -g -O2 -target bpf -c $< -o $@
+ -g -O2 -target bpf -c $< -o $@ && $(LLVM_STRIP) -g $@
$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@