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Date: Tue, 9 Jun 2015 18:29:35 +0800
From: "Wangnan (F)" <wangnan0@huawei.com>
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Subject: Re: [RFC PATCH v6 22/32] perf tools: Make perf depend on libbpf
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On 2015/6/9 13:50, Wang Nan wrote:

[SNIP]
> +LIBBPF = $(BPF_PATH)libbpf.a
> +
>   # python extension build directories
>   PYTHON_EXTBUILD     := $(OUTPUT)python_ext_build/
>   PYTHON_EXTBUILD_LIB := $(PYTHON_EXTBUILD)lib/
> @@ -227,6 +232,9 @@ export PERL_PATH
>   LIB_FILE=$(OUTPUT)libperf.a
>   
>   PERFLIBS = $(LIB_FILE) $(LIBAPI) $(LIBTRACEEVENT)
> +ifndef NO_LIBELF
> +  PERFLIBS += $(LIBBPF)
> +endif
>   

Here should be

ifndef NO_LIBBPF
   PERFLIBS += $(LIBBPF)
endif