Messages in this thread | | | Date | Wed, 23 Feb 2005 22:25:59 +0100 | From | Adrian Bunk <> | Subject | Re: [PATCH][2.4.30-pre1] preliminary fixes for gcc-4.0 |
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On Thu, Feb 10, 2005 at 04:28:58PM +0100, Mikael Pettersson wrote: > Here is a preliminary set of patches to allow gcc-4.0 (20050130) > to compile the 2.4.30-pre1 kernel. I make no claim that the patches > are complete, but they have been tested successfully on i386 (multiple > boxes), x86-64, and ppc32. > > The changes fall into these categories: >... > - Add -Wno-pointer-sign to silence lots of compiler warnings. >... > /Mikael >... > --- linux-2.4.30-pre1/arch/i386/Makefile 2004-11-17 18:36:41.000000000 +0100 > +++ linux-2.4.30-pre1.gcc4-fixes-v5/arch/i386/Makefile 2005-02-10 14:35:01.000000000 +0100 > @@ -98,6 +98,9 @@ endif > # due to the lack of sharing of stacklots. > CFLAGS += $(call check_gcc,-fno-unit-at-a-time,) > > +# disable pointer signedness warnings in gcc 4.0 > +CFLAGS += $(call check_gcc,-Wno-pointer-sign,) > + > HEAD := arch/i386/kernel/head.o arch/i386/kernel/init_task.o > > SUBDIRS += arch/i386/kernel arch/i386/mm arch/i386/lib > diff -rupN linux-2.4.30-pre1/arch/ppc/Makefile linux-2.4.30-pre1.gcc4-fixes-v5/arch/ppc/Makefile > --- linux-2.4.30-pre1/arch/ppc/Makefile 2004-04-14 20:22:20.000000000 +0200 > +++ linux-2.4.30-pre1.gcc4-fixes-v5/arch/ppc/Makefile 2005-02-10 14:35:01.000000000 +0100 > @@ -25,6 +25,11 @@ CFLAGS := $(CFLAGS) -I$(TOPDIR)/arch/$( > HOSTCFLAGS += -I$(TOPDIR)/arch/$(ARCH) > CPP = $(CC) -E $(CFLAGS) > > +check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi) > + > +# disable pointer signedness warnings in gcc 4.0 > +CFLAGS += $(call check_gcc,-Wno-pointer-sign,) > + > ifdef CONFIG_4xx > CFLAGS := $(CFLAGS) -Wa,-m405 > endif >... > --- linux-2.4.30-pre1/arch/x86_64/Makefile 2004-04-14 20:22:20.000000000 +0200 > +++ linux-2.4.30-pre1.gcc4-fixes-v5/arch/x86_64/Makefile 2005-02-10 14:35:01.000000000 +0100 > @@ -56,6 +56,9 @@ endif > # this is needed right now for the 32bit ioctl code > CFLAGS += $(call check_gcc,-fno-unit-at-a-time,) > > +# disable pointer signedness warnings in gcc 4.0 > +CFLAGS += $(call check_gcc,-Wno-pointer-sign,) > + > ifdef CONFIG_MK8 > CFLAGS += $(call check_gcc,-march=k8,) > endif >...
Shouldn't the first part of these three patches (adding -Wno-pointer-sign to the main Makefile be enough)?
That's also how it's handled in 2.6 .
cu Adrian
--
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