[Buildroot] [PATCH 2/7 v4] support/dependencies: check for system-provided bison and flex

[Yann E. MORIN]

Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
Cc: Arnout Vandecappelle <arnout at mind.be>
---
 support/dependencies/check-host-bison-flex.mk | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 support/dependencies/check-host-bison-flex.mk

diff --git a/support/dependencies/check-host-bison-flex.mk b/support/dependencies/check-host-bison-flex.mk
new file mode 100644
index 0000000000..233b6c51cc
--- /dev/null
+++ b/support/dependencies/check-host-bison-flex.mk
@@ -0,0 +1,10 @@
+# If the system lacks bison or flex, add
+# dependencies to suitable host packages
+
+ifeq ($(shell which bison 2>/dev/null),)
+BR2_BISON_HOST_DEPENDENCY = host-bison
+endif
+
+ifeq ($(shell which flex 2>/dev/null),)
+BR2_FLEX_HOST_DEPENDENCY = host-flex
+endif
-- 
2.14.1