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David Carrillo-Cisneros 9961aa665b tools build: Fix feature detection redefinion of build flags 
This change is a follow up of https://lkml.org/lkml/2017/2/2/16

The patch above avoided redefining CC, CXX and PKG_CONFIG in feature
detection. The patch was not merged due to a unsolved concern with the
-MD flag.

Later, commit c8c188679c ("tools build: Use the same CC for feature
detection and actual build") did the change for CC and CXX but not
PKG_CONFIG.

This patch makes PKG_CONFIG consistent with CC and CXX and moves the -MD
to CFLAGS, as suggested by Jiri in the thread above.

Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Paul Turner <pjt@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Simon Que <sque@chromium.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20170412064919.92449-3-davidcc@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 		2017-04-13 11:48:48 -03:00
..
Documentation tools build: Add CFLAGS_REMOVE_* support 2016-11-14 11:37:25 -03:00
feature tools build: Fix feature detection redefinion of build flags 2017-04-13 11:48:48 -03:00
tests tools build: Build fixdep helper from perf and basic libs 2015-09-28 15:50:55 -03:00
.gitignore perf build: Add fixdep to .gitignore 2015-10-20 10:43:28 -03:00
Build tools build: Make fixdep a hostprog 2016-10-03 11:40:35 -03:00
Build.include tools build: Move tabs to spaces where suitable 2016-12-05 16:06:03 -03:00
Makefile perf build: Add special fixdep cleaning rule 2017-02-17 16:04:38 -03:00
Makefile.build tools build: Add tools tree support for 'make -s' 2017-01-26 16:29:00 -03:00
Makefile.feature tools build: Add test for sched_getcpu() 2017-03-03 19:07:19 -03:00
Makefile.include perf build: Add special fixdep cleaning rule 2017-02-17 16:04:38 -03:00
fixdep.c tools build: Make fixdep parsing wait for last target 2016-12-05 15:51:42 -03:00