diff --git a/external.mk b/external.mk
index ddfc9bbb..39cdb0c6 100644
--- a/external.mk
+++ b/external.mk
@@ -3,6 +3,7 @@ IXMSG = printf "\e[37;44m>>>   $(call qstrip,$(1))\e[0m\n"
 include $(sort $(wildcard $(BR2_EXTERNAL_INFIX_PATH)/package/*/*.mk))
 include $(BR2_EXTERNAL_INFIX_PATH)/board/common/common.mk
 -include $(BR2_EXTERNAL_INFIX_PATH)/board/$(patsubst "%",%,$(BR2_ARCH))/board.mk
+include $(BR2_EXTERNAL_INFIX_PATH)/infix.mk
 
 .PHONY: local.mk
 local.mk:
diff --git a/infix.mk b/infix.mk
new file mode 100644
index 00000000..d710f494
--- /dev/null
+++ b/infix.mk
@@ -0,0 +1 @@
+INFIX_CFLAGS:=-Wall -Werror -Wextra -Wno-unused-parameter -Wformat=2 -Wformat-overflow=2 -Winit-self -Wstrict-overflow=4 -Wno-format-truncation -Wno-format-nonliteral