ebpf: Add a separate target for skeleton

This generalizes the rule to generate the skeleton and allows to add
another.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

diff --git a/tools/ebpf/Makefile.ebpf b/tools/ebpf/Makefile.ebpf
index 3391e7ce08981acecd1fa2cc97738e7843f77e3e..572ca5987ae669a6f9972b542b411cd511e891e1 100755 (executable)
--- a/tools/ebpf/Makefile.ebpf
+++ b/tools/ebpf/Makefile.ebpf
@@ -1,23 +1,24 @@
-OBJS = rss.bpf.o
+SKELETONS = rss.bpf.skeleton.h
 
 LLVM_STRIP ?= llvm-strip
 CLANG ?= clang
 INC_FLAGS = `$(CLANG) -print-file-name=include`
 EXTRA_CFLAGS ?= -O2 -g -target bpf
 
-all: $(OBJS)
+all: $(SKELETONS)
 
 .PHONY: clean
 
 clean:
-       rm -f $(OBJS)
-       rm -f rss.bpf.skeleton.h
+       rm -f $(SKELETONS) $(SKELETONS:%.skeleton.h=%.o)
 
-$(OBJS):  %.o:%.c
+%.o: %.c
        $(CLANG) $(INC_FLAGS) \
                 -D__KERNEL__ -D__ASM_SYSREG_H \
                 -I../include $(LINUXINCLUDE) \
                 $(EXTRA_CFLAGS) -c $< -o $@
        $(LLVM_STRIP) -g $@
-       bpftool gen skeleton rss.bpf.o > rss.bpf.skeleton.h
-       cp rss.bpf.skeleton.h ../../ebpf/
+
+%.skeleton.h: %.o
+       bpftool gen skeleton $< > $@
+       cp $@ ../../ebpf/