[2.6 patch] add -Werror-implicit-function-declaration to CFLAGS

[Adrian Bunk <bunk@stusta.de>]

Currently, using an undeclared function gives a compile warning, but it 
can lead to a nasty to debug runtime stack corruptions if the prototype 
of the function is different from what gcc guessed.

With -Werror-implicit-function-declaration we are getting an immediate
compile error instead.

Signed-off-by: Adrian Bunk <bunk@stusta.de>

---

 Makefile                               |    3 ++-
 drivers/input/joystick/iforce/Makefile |    2 --
 2 files changed, 2 insertions(+), 3 deletions(-)

--- linux-2.6.17-mm3-full/Makefile.old	2006-06-27 11:06:51.000000000 +0200
+++ linux-2.6.17-mm3-full/Makefile	2006-06-27 11:07:12.000000000 +0200
@@ -317,7 +317,8 @@
 CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)
 
 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-                   -fno-strict-aliasing -fno-common
+                   -fno-strict-aliasing -fno-common \
+		   -Werror-implicit-function-declaration
 AFLAGS          := -D__ASSEMBLY__
 
 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
--- linux-2.6.17-mm3-full/drivers/input/joystick/iforce/Makefile.old	2006-06-27 11:07:20.000000000 +0200
+++ linux-2.6.17-mm3-full/drivers/input/joystick/iforce/Makefile	2006-06-27 11:07:32.000000000 +0200
@@ -16,5 +16,3 @@
 ifeq ($(CONFIG_JOYSTICK_IFORCE_USB),y)
 	iforce-objs += iforce-usb.o
 endif
-
-EXTRA_CFLAGS = -Werror-implicit-function-declaration