[PATCH] Makefile: enable Werror=implicit-function-declaration

[Lucas Stach]

This should prevent us from ever again missing an
failure similar to that one fixed in ee3254569dab
(EFI: add missing include) by throwing a build error.

Signed-off-by: Lucas Stach <dev at lynxeye.de>
---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile b/Makefile
index b059c3a00eaa..90b2b6368554 100644
--- a/Makefile
+++ b/Makefile
@@ -300,6 +300,7 @@ LINUXINCLUDE    := -Iinclude -I$(srctree)/dts/include \
 CPPFLAGS        := -D__KERNEL__ -D__BAREBOX__ $(LINUXINCLUDE) -fno-builtin -ffreestanding
 
 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
+                   -Werror=implicit-function-declaration \
                    -fno-strict-aliasing -fno-common -Os -pipe
 AFLAGS          := -D__ASSEMBLY__
 
-- 
1.9.3