[PATCH] selftests: alsa: Handle pkg-config failure more gracefully

[Mark Brown]

Follow the pattern used by other selftests like memfd and fall back on the
standard toolchain options to build with a system installed alsa-lib if
we don't get anything from pkg-config. This reduces our build dependencies
a bit in the common case while still allowing use of pkg-config in case
there is a need for it.

Signed-off-by: Mark Brown <broonie at kernel.org>
---
 tools/testing/selftests/alsa/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
index f64d9090426d..fd8ddce2b1a6 100644
--- a/tools/testing/selftests/alsa/Makefile
+++ b/tools/testing/selftests/alsa/Makefile
@@ -3,6 +3,9 @@
 
 CFLAGS += $(shell pkg-config --cflags alsa)
 LDLIBS += $(shell pkg-config --libs alsa)
+ifeq ($(LDLIBS),)
+LDLIBS += -lasound
+endif
 
 TEST_GEN_PROGS := mixer-test
 
-- 
2.30.2