From 7058b01983add1a2375e07c4db5c694090ef78bc Mon Sep 17 00:00:00 2001
From: Angus Gratton <angus@espressif.com>
Date: Mon, 26 Sep 2016 15:59:39 +1000
Subject: [PATCH] BT: Relink component on new BT library, auto-initialise
 submodule if missing

---
 components/bt/component.mk | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/components/bt/component.mk b/components/bt/component.mk
index 8290f9f4a4..a9233cc74a 100644
--- a/components/bt/component.mk
+++ b/components/bt/component.mk
@@ -16,8 +16,10 @@ COMPONENT_ADD_LDFLAGS := -lbt -L$(abspath lib) \
                            $(addprefix -l,$(LIBS)) \
                           $(LINKER_SCRIPTS)
 
+include $(IDF_PATH)/make/component_common.mk
 
 ALL_LIB_FILES := $(patsubst %,$(COMPONENT_PATH)/lib/lib%.a,$(LIBS))
 $(COMPONENT_LIBRARY): $(ALL_LIB_FILES)
 
-include $(IDF_PATH)/make/component_common.mk
+# automatically trigger a git submodule update if BT library is missing
+$(eval $(call SubmoduleRequiredForFiles,$(ALL_LIB_FILES)))