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From: Song Liu <songliubraving@fb.com>
To: <bpf@vger.kernel.org>
Cc: Song Liu <songliubraving@fb.com>, Andrii Nakryiko <andriin@fb.com>
Subject: [PATCH v2 bpf] tools/bpf/runqslower: Rebuild libbpf.a on libbpf source change
Date: Tue, 4 Feb 2020 13:50:37 -0800	[thread overview]
Message-ID: <20200204215037.2258698-1-songliubraving@fb.com> (raw)

Add missing dependency of $(BPFOBJ) to $(LIBBPF_SRC), so that running make
in runqslower/ will rebuild libbpf.a when there is change in libbpf/.

Fixes: 9c01546d26d2 ("tools/bpf: Add runqslower tool to tools/bpf")
Acked-by: Andrii Nakryiko <andriin@fb.com>
Cc: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
---
 tools/bpf/runqslower/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/bpf/runqslower/Makefile b/tools/bpf/runqslower/Makefile
index 87eae5be9bcd..39edd68afa8e 100644
--- a/tools/bpf/runqslower/Makefile
+++ b/tools/bpf/runqslower/Makefile
@@ -75,7 +75,7 @@ $(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(OUTPUT) $(BPFTOOL)
 	fi
 	$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF_PATH) format c > $@
 
-$(BPFOBJ): | $(OUTPUT)
+$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(OUTPUT)
 	$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC)			       \
 		    OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
 
-- 
2.17.1


             reply	other threads:[~2020-02-04 21:50 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-04 21:50 Song Liu [this message]
2020-02-05 21:22 ` [PATCH v2 bpf] tools/bpf/runqslower: Rebuild libbpf.a on libbpf source change Daniel Borkmann

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