[PATCH v3 2/2] tools: kwboot: use pkg-config to get -ltinfo

[Heiko Thiery]

Instead of hardcoding -ltinfo as the flags needed to build
kwboot, use pkg-config when available.

We gracefully fallback on the previous behavior of hardcoding -ltinfo
if pkg-config is not available or fails with an error.

Reviewed-by: Pali Rohár <pali at kernel.org>
Signed-off-by: Heiko Thiery <heiko.thiery at gmail.com>
---
v3:
 - remove cflags detection again
 - added reviewed-by

v2:
 - also add cflags detection via pkg-config (Thanks Pali)

 tools/Makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/Makefile b/tools/Makefile
index aab06aec93..005e7362a3 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -198,7 +198,9 @@ hostprogs-$(CONFIG_EXYNOS5420) += mkexynosspl
 HOSTCFLAGS_mkexynosspl.o := -pedantic
 
 HOSTCFLAGS_kwboot.o += -pthread
-HOSTLDLIBS_kwboot += -pthread -ltinfo
+HOSTLDLIBS_kwboot += -pthread
+HOSTLDLIBS_kwboot += \
+	$(shell pkg-config --libs tinfo 2> /dev/null || echo "-ltinfo")
 
 ifdtool-objs := $(LIBFDT_OBJS) ifdtool.o
 hostprogs-$(CONFIG_X86) += ifdtool
-- 
2.30.2