[RFC] remove -W from build process

[Sebastian Andrzej Siewior]

I didn't really figured what exactly goes wrong but if I compile with
CFLAGS unset then the compile process goes like this:
| gcc -O2 -Werror -Wall -Iinclude -Isrc -I../../include src/ubiupdatevol.c -c -o ubiupdatevol.o

Once I set the enviroment CFLAGS to "-g -O2" I also get
"-Wall -Wall -Wwrite-strings -W":
| gcc -g -O2 -Wall -Wall -Wwrite-strings -W -Werror -Wall -Iinclude -Isrc -I../../include src/ubiupdatevol.c -c -o ubiupdatevol.o
|cc1: warnings being treated as errors
|src/ubiupdatevol.c: In function 'truncate_volume':
|src/ubiupdatevol.c:179: error: comparison between signed and unsigned
|src/ubiupdatevol.c:183: error: comparison between signed and unsigned
....

and it aborts. I tried to cleanup the signed and unsigned thing but it is
a long a way. So I guess it may be the best to just disable -Wextra for
now.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy at linutronix.de>
---
Would it be possible to use autotools for a clean build environment?

 ubi-utils/Makefile |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/ubi-utils/Makefile b/ubi-utils/Makefile
index 63058e1..67e9f6a 100644
--- a/ubi-utils/Makefile
+++ b/ubi-utils/Makefile
@@ -10,7 +10,7 @@ INCLUDEDIR=/usr/include
 
 CC := $(CROSS)gcc
 CFLAGS ?= -O2 -g -Werror
-CFLAGS += -Wall -Wwrite-strings -W
+CFLAGS += -Wall -Wwrite-strings
 CPPFLAGS += -I./inc -I./src -I$(KERNELHDR) \
 	-std=gnu99 -DPACKAGE_VERSION=\"1.0\"
 
-- 
1.5.6.5