[SLOF] [PATCH slof v2 12/12] Makefile: Actually compile with -Wextra

[Alexey Kardashevskiy]

-Wextra enables a bunch of rather useful checks which this fixes.

The only exception is -Wno-unused-parameter, one thing at the time.

Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
---
 make.rules | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/make.rules b/make.rules
index 3dfbb5b136c2..885eea3f48b0 100644
--- a/make.rules
+++ b/make.rules
@@ -76,7 +76,7 @@ AR		?= $(CROSS)ar
 RANLIB		?= $(CROSS)ranlib
 CPP		?= $(CROSS)cpp
 
-WARNFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -Wformat-security
+WARNFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -Wformat-security -Wextra -Wno-unused-parameter
 CFLAGS ?= -g -O2 -fno-builtin -ffreestanding -nostdinc -msoft-float \
 	  -fno-strict-aliasing -mno-altivec -mabi=no-altivec \
 	  -fno-stack-protector -fno-asynchronous-unwind-tables $(WARNFLAGS)
-- 
2.17.1