[PATCH bpf-next v2] tools/runqslower: Fix LDFLAGS and add LDLIBS support

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Actually use previously defined LDFLAGS during build and add support for
LDLIBS to link extra standalone libraries e.g. 'argp' which is not provided
by musl libc.

Fixes: 585bf4640ebe ("tools: runqslower: Add EXTRA_CFLAGS and EXTRA_LDFLAGS support")
Signed-off-by: Tony Ambardar <tony.ambardar@xxxxxxxxx>
---
v1-v2:
 - add missing CC for Ilya

---
 tools/bpf/runqslower/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/bpf/runqslower/Makefile b/tools/bpf/runqslower/Makefile
index d8288936c912..c4f1f1735af6 100644
--- a/tools/bpf/runqslower/Makefile
+++ b/tools/bpf/runqslower/Makefile
@@ -15,6 +15,7 @@ INCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(abspath ../../include/uapi)
 CFLAGS := -g -Wall $(CLANG_CROSS_FLAGS)
 CFLAGS += $(EXTRA_CFLAGS)
 LDFLAGS += $(EXTRA_LDFLAGS)
+LDLIBS += -lelf -lz
 
 # Try to detect best kernel BTF source
 KERNEL_REL := $(shell uname -r)
@@ -51,7 +52,7 @@ clean:
 libbpf_hdrs: $(BPFOBJ)
 
 $(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $(BPFOBJ)
-	$(QUIET_LINK)$(CC) $(CFLAGS) $^ -lelf -lz -o $@
+	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
 
 $(OUTPUT)/runqslower.o: runqslower.h $(OUTPUT)/runqslower.skel.h	      \
 			$(OUTPUT)/runqslower.bpf.o | libbpf_hdrs
-- 
2.34.1





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