Building GCC for ARM and Linux/ucLibc

[Christophe Lyon]

On 03.08.2012 07:53, Kai Ruottu wrote:
> 1.8.2012 16:40, Ian Lance Taylor kirjoitti:
>> On Tue, Jul 31, 2012 at 7:48 AM, Christophe Lyon <christophe.lyon@st.com> wrote:
>>> I have some trouble to build the right cross-GCC for ARM running Linux and
>>> ucLibc, which I want to support -fstack-protector.
>>>
>>> Indeed, if I use arm-uclinuxeabi or arm-unknown-uclinux-uclibcgnueabi as
>>> --target triplet, GCC's configure says:
>>> checking __stack_chk_fail in target C library... no
>>> I have also looked at config.gcc, and I think the triplet should also match
>>> arm*-*-uclinux* to get the right configuration.
>>>
>>> What triplet should I use?
>> I don't know.  Perhaps the uClibc developers can suggest something.
>>
>> I see that the tree supports *-*-linux-uclibc in various cases.  But I
>> do also see uclinux used.  I'm not sure why this discrepancy arose.
>>
> The 'http://www.uclinux.org/description/' tells  about uClinux:
>
> "intended for microcontrollers without Memory Management Units (MMUs)"
>
> meanwhile Linux is for CPUs with MMUs. There is the difference I think... So
> the target(s) '*-*-linux-uclibc' are Linuces which use uClibc as their C
> library,
> not the normal 'glibc', "GNU C library"...
>
> So Christophe, which one you want your opsys kernel to be, Linux or uClinux?
>
Since my target is MMU-less, I guess I want uClinux, but as Ian confirmed, it looks like at least the test for
stack_check_fail should also match uclinux.

Thanks.