Build 32 bit binaries on amd64

[Dan McGregor]

I think I agree now.  The more code shared between archtectures the
better.  I've committed some patches to my github freebsd fork that
merge exec.h, asm.h and ucontex.h into x86.  I'll probably do more
later tonight.

On 21 August 2012 07:44, John Baldwin <jhb at freebsd.org> wrote:
> On Tuesday, August 21, 2012 4:49:30 am Konstantin Belousov wrote:
>> On Mon, Aug 20, 2012 at 08:32:41PM -0600, Dan McGregor wrote:
>> > Hi.
>> >
>> > I've been working on porting compiler-rt/clang's support for address
>> > sanitization (asan) to FreeBSD.  So far I have it building and it
>> > appears to work properly, however the build system expects to be able
>> > to build 32 bit binaries on amd64.
>> >
>> > amd64 doesn't include i386's machine/foo headers.  The included patch
>> > is my proposed solution:
>> >
>> > Add i386 headers to /usr/include/i386, and in machine/foo.h, check if
>> > it's a 32 bit build and include the appropriate header from i386.
>> >
>> > For example machine/ucontext.h will include i386/ucontext.h if
>> > compiled with -m32.
>> >
>> > Thoughts?
>> >
>> > If anyone's curious about the compiler_rt port, I have it at
>> > github.com/dannomac/compiler-rt on the branch named freebsd.
>>
>> There was a work by Tijl Coosemans in the similar, but somewhat less hacky
>> direction. The headers are moved into sys/x86/include and unified as much
>> as possible, while machine/ counterpart includes corresponding header
>> from x86/include.
>>
>> I even lost track of how much more headers is left to convert. In fact,
>> not all headers are equal, some are only useful for kernel or base system.
>> Also, parts of the critically important headers do not live in machine/
>> at all, e.g. the headers from libm.
>>
>> The work seems to be stale, do you want to cooperate with Tijl or continue ?
>
> I think we should probably follow Tijl's model since we are on that path.
> I originally preferred the /usr/include/i386 approach, but have come around
> to Tjil's approach instead.
>
> --
> John Baldwin
> _______________________________________________
> freebsd-hackers at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers
> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe at freebsd.org"