A full kernel compilation, especially when using the -j switch to
make, can cause warnings to "fly off the screen" without the user
noticing them. For example, wli's patch lazy_buddy.2.5.25-1 of today
had a missing return statement in a function returning non void, which
the compiler probably complained about but the warning got lost in the
noise (a little birdie told me wli used -j64).=20
The easiest safeguard agsinst this kind of problems is to compile with
-Werror, so that wherever there's a warning, compilation
stops. Compiling 2.5.25 with -Werror with my .config found only three
warnings (quite impressive, IMHO), and patches for those were sent to
trivial@rusty.
Patch against 2.5.25 to add -Werror attached:
--- linux-2.5.25-vanilla/Makefile Sat Jul 6 02:42:04 2002
+++ linux-2.5.25-mx/Makefile Sat Jul 13 10:01:55 2002
@@ -39,7 +39,7 @@
FINDHPATH =3D $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net
=20
HOSTCC =3D gcc
-HOSTCFLAGS =3D -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+HOSTCFLAGS =3D -Wall -Werror -Wstrict-prototypes -O2 -fomit-frame-pointer=
=20
=20
CROSS_COMPILE =3D
=20
@@ -211,7 +211,7 @@
=20
CPPFLAGS :=3D -D__KERNEL__ -I$(HPATH)
=20
-CFLAGS :=3D $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
+CFLAGS :=3D $(CPPFLAGS) -Wall -Werror -Wstrict-prototypes -Wno-trigraphs -=
O2 \
-fomit-frame-pointer -fno-strict-aliasing -fno-common
AFLAGS :=3D -D__ASSEMBLY__ $(CPPFLAGS)
--=20
http://vipe.technion.ac.il/~mulix/
http://syscalltrack.sf.net/
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