[PATCH] perf build: don't hardcode pkg-config path

[Jan Kundrát]

On Buildroot and when building for Arm using the Bootlin toolchain, the
actual `pkg-config` is named just `pkg-config`, not
`arm-linux-pkg-config`. This patch allows the external build system
(such as Buildroot) to pass a working path.

This is already done correctly in tools/build/feature/Makefile and
tools/thermal/tmon/Makefile and also fixed in other places many years
ago (9961aa665b70e47d6c80141c4a2482266010f246), but for some reason it
was never fixed in this file.

Signed-off-by: Jan Kundrát <jan.kundrat@xxxxxxxxx>
To: linux-perf-users@xxxxxxxxxxxxxxx
Cc: Yann E. MORIN <yann.morin.1998@xxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 tools/perf/Makefile.perf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 86569f230e60..b69ab2ae77c6 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -188,7 +188,7 @@ HOSTLD  ?= ld
 HOSTAR  ?= ar
 CLANG   ?= clang
 
-PKG_CONFIG = $(CROSS_COMPILE)pkg-config
+PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config
 
 RM      = rm -f
 LN      = ln -f
-- 
2.43.0