[PATCH 1/1] selftests: gpio: use pkg-config to determine libmount CFLAGS/LDLIBS

[Fathi Boudra]

Fix hardcoded and misplaced libmount headers. Use pkg-config instead to
figure out CFLAGS/LDLIBS, fixing also their value for cross-compilation.

If pkg-config isn't installed, it gives an error (command not found) and
gpio test will fail to build because it won't be able to find the headers
or link to libmount library.

Signed-off-by: Fathi Boudra <fathi.boudra@xxxxxxxxxx>
---
 tools/testing/selftests/gpio/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile
index 298929df97e6..11eed0cdec2a 100644
--- a/tools/testing/selftests/gpio/Makefile
+++ b/tools/testing/selftests/gpio/Makefile
@@ -17,8 +17,8 @@ override define CLEAN
 	$(RM) -r $(EXTRA_DIRS)
 endef
 
-CFLAGS += -O2 -g -std=gnu99 -Wall -I../../../../usr/include/
-LDLIBS += -lmount -I/usr/include/libmount
+CFLAGS += -O2 -g -std=gnu99 -Wall -I../../../../usr/include/ $(shell pkg-config --cflags mount)
+LDLIBS += $(shell pkg-config --libs mount)
 
 $(BINARIES): ../../../gpio/gpio-utils.o ../../../../usr/include/linux/gpio.h
 
-- 
2.13.0