[tip:perf/core] tools lib: Allow external definition of CC, AR and LD

[tip-bot for David Carrillo-Cisneros <tipbot@zytor.com>]

Commit-ID:  12024aacb0170779cd0b976b06d2e9b1767cf142
Gitweb:     http://git.kernel.org/tip/12024aacb0170779cd0b976b06d2e9b1767cf142
Author:     David Carrillo-Cisneros <davidcc@google.com>
AuthorDate: Sun, 27 Aug 2017 00:54:39 -0700
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 28 Aug 2017 16:44:45 -0300

tools lib: Allow external definition of CC, AR and LD

Use already defined values for CC, AR and LD when available.

Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Paul Turner <pjt@google.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20170827075442.108534-4-davidcc@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/lib/api/Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/lib/api/Makefile b/tools/lib/api/Makefile
index eb6e0b3..2538675 100644
--- a/tools/lib/api/Makefile
+++ b/tools/lib/api/Makefile
@@ -8,9 +8,9 @@ srctree := $(patsubst %/,%,$(dir $(srctree)))
 #$(info Determined 'srctree' to be $(srctree))
 endif
 
-CC = $(CROSS_COMPILE)gcc
-AR = $(CROSS_COMPILE)ar
-LD = $(CROSS_COMPILE)ld
+CC ?= $(CROSS_COMPILE)gcc
+AR ?= $(CROSS_COMPILE)ar
+LD ?= $(CROSS_COMPILE)ld
 
 MAKEFLAGS += --no-print-directory