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Message-ID: <1450329794-161948-3-git-send-email-wangnan0@huawei.com>
Date:	Thu, 17 Dec 2015 05:23:06 +0000
From:	Wang Nan <wangnan0@...wei.com>
To:	<ast@...nel.org>, <agartrell@...com>, <acme@...hat.com>,
	<bblanco@...mgrid.com>, <daniel@...earbox.net>,
	<daniel.wagner@...-carit.de>, <davem@...emloft.net>,
	<mingo@...nel.org>, <jolsa@...nel.org>, <xiakaixu@...wei.com>,
	<holzheu@...ux.vnet.ibm.com>, <yang.shi@...aro.org>
CC:	<linux-kernel@...r.kernel.org>, <pi3orama@....com>,
	Wang Nan <wangnan0@...wei.com>
Subject: [PATCH 02/10] bpf tools: Define LD and RM in Makefile for 'make -R'

Building libbpf with 'make -R' causes error:

 $ make -R

 Auto-detecting system features:
 ...                        libelf: [ on  ]
 ...                           bpf: [ on  ]

   CC       fixdep.o
   LD       fixdep-in.o
 /bin/sh: -r: command not found
 make[2]: *** [fixdep-in.o] Error 127
 make[1]: *** [fixdep-in.o] Error 2
 make: *** [fixdep] Error 2

Makefile for libbpf requires $(LD) and $(RM), but in case of 'make -R'
the builtin variables are gone. This patch define default RM and LD so
it won't fail in 'make -R'.

Signed-off-by: Wang Nan <wangnan0@...wei.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Jiri Olsa <jolsa@...nel.org>
---
 tools/lib/bpf/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index 0b6e013..7bec12f 100644
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -5,6 +5,8 @@ BPF_PATCHLEVEL = 0
 BPF_EXTRAVERSION = 1
 
 MAKEFLAGS += --no-print-directory
+RM ?= rm -f
+LD ?= $(CROSS_COMPILE)ld
 
 ifeq ($(srctree),)
 srctree := $(patsubst %/,%,$(dir $(shell pwd)))
-- 
1.8.3.4

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