* Is it possible to build a cross compiler supporting both big & little endian?
@ 2009-09-06 15:59 Joachim Nilsson
2009-09-06 16:14 ` Yann E. MORIN
2009-09-06 16:20 ` Ralf Corsepius
0 siblings, 2 replies; 4+ messages in thread
From: Joachim Nilsson @ 2009-09-06 15:59 UTC (permalink / raw)
To: crossgcc
Hi!
We run both little and big endian Arm targets at work. Currently both
are Arm9 so naturally I started thinking about creating one single
toolchain to bind them all...
I put together a standard arm-unknown-linux-uclibc with crosstool and
building the kernel worked fine using "-mbig-endian -mcpu=xscale
-mtune=xscale -msoft-float", but when I reached userspace the first
effort at linking with libgcc of course failed.
So I wonder, is it even possible to maintain one toolchain supporting
different endians?
Regards
/Jocke
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* Re: Is it possible to build a cross compiler supporting both big & little endian?
2009-09-06 15:59 Is it possible to build a cross compiler supporting both big & little endian? Joachim Nilsson
@ 2009-09-06 16:14 ` Yann E. MORIN
2009-09-06 16:27 ` Joachim Nilsson
2009-09-06 16:20 ` Ralf Corsepius
1 sibling, 1 reply; 4+ messages in thread
From: Yann E. MORIN @ 2009-09-06 16:14 UTC (permalink / raw)
To: crossgcc; +Cc: Joachim Nilsson
Joachim,
All,
On Sunday 06 September 2009 17:59:38 Joachim Nilsson wrote:
> We run both little and big endian Arm targets at work. Currently both
> are Arm9 so naturally I started thinking about creating one single
> toolchain to bind them all...
Hehe! :-)
> So I wonder, is it even possible to maintain one toolchain supporting
> different endians?
It is theoretically possible. That's called "multilib".
But crosstool-NG does not support that.
There has been some discussions about the issue; search the archives.
The latest was in last July, IIRC.
Regards,
Yann E. MORIN.
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* Re: Is it possible to build a cross compiler supporting both big & little endian?
2009-09-06 16:14 ` Yann E. MORIN
@ 2009-09-06 16:27 ` Joachim Nilsson
0 siblings, 0 replies; 4+ messages in thread
From: Joachim Nilsson @ 2009-09-06 16:27 UTC (permalink / raw)
To: Yann E. MORIN; +Cc: crossgcc
Hi Yann & Ralf!
On 09/06/2009 06:14 PM, Yann E. MORIN wrote:
> On Sunday 06 September 2009 17:59:38 Joachim Nilsson wrote:
>> So I wonder, is it even possible to maintain one toolchain supporting
>> different endians?
> It is theoretically possible. That's called "multilib".
Aha, thanks!
> There has been some discussions about the issue; search the archives.
> The latest was in last July, IIRC.
Yep, found some now. It helps to have a keyword or such to pull at.
:-)
Regards
/Jocke
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* Re: Is it possible to build a cross compiler supporting both big & little endian?
2009-09-06 15:59 Is it possible to build a cross compiler supporting both big & little endian? Joachim Nilsson
2009-09-06 16:14 ` Yann E. MORIN
@ 2009-09-06 16:20 ` Ralf Corsepius
1 sibling, 0 replies; 4+ messages in thread
From: Ralf Corsepius @ 2009-09-06 16:20 UTC (permalink / raw)
To: Joachim Nilsson; +Cc: crossgcc
On 09/06/2009 05:59 PM, Joachim Nilsson wrote:
> Hi!
>
> We run both little and big endian Arm targets at work. Currently both
> are Arm9 so naturally I started thinking about creating one single
> toolchain to bind them all...
>
> I put together a standard arm-unknown-linux-uclibc with crosstool and
> building the kernel worked fine using "-mbig-endian -mcpu=xscale
> -mtune=xscale -msoft-float", but when I reached userspace the first
> effort at linking with libgcc of course failed.
>
> So I wonder, is it even possible to maintain one toolchain supporting
> different endians?
Generally speaking, of course it is. What you are looking for is a
big/little endian multilib'ed toolchains.
Ralf
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2009-09-06 15:59 Is it possible to build a cross compiler supporting both big & little endian? Joachim Nilsson
2009-09-06 16:14 ` Yann E. MORIN
2009-09-06 16:27 ` Joachim Nilsson
2009-09-06 16:20 ` Ralf Corsepius
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