linux-kernel - Re: [x86 setup 13/33] Header file to produce 16-bit code with gcc

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Message-ID: <4693FE48.1010606@zytor.com>
Date:	Tue, 10 Jul 2007 14:46:48 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Adrian Bunk <bunk@...sta.de>
CC:	Segher Boessenkool <segher@...nel.crashing.org>,
	Andi Kleen <ak@...e.de>, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: [x86 setup 13/33] Header file to produce 16-bit code with gcc

Adrian Bunk wrote:
>>
>> For now, I have:
> 
> Can't you use the global CFLAGS and append your specific ones?
> 

No.  A lot of the x86-64 flags don't work with -m32.

>> CFLAGS          := $(LINUXINCLUDE) -g -Os -D_SETUP -D__KERNEL__ \
> 
> -g ???

Leaves debugging information in setup.elf.  It is handy sometimes.

>>                    $(cflags-$(ARCH)) \
>>                    -Wall -Wstrict-prototypes \
>>                    -march=i386 -mregparm=3 \
> 
> Why -march=i386 ?

So we can at least spit out an error message.

	-hpa
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