Google Summer of Code 2013(?)

Iain Buclaw ibuclaw at ubuntu.com
Wed Mar 27 04:12:51 PDT 2013


On 27 March 2013 11:06, Iain Buclaw <ibuclaw at ubuntu.com> wrote:

> On 27 March 2013 08:14, Johannes Pfau <nospam at example.com> wrote:
>
>> Am Wed, 27 Mar 2013 01:50:40 +0100
>> schrieb Martin Nowak <code at dawg.eu>:
>>
>> > On 03/26/2013 06:22 PM, Iain Buclaw wrote:
>> > > We certainly can do. Which compiler do you have in mind for using?
>> > >
>> > I mostly thought of porting GDC and LDC to linux glibc and bionic.
>> > A Windows ARM port would be interesting too, but could be out of
>> > reach. Support for bare metal targets is interesting too (I've
>> > already used GDC for STM32) but way less important.
>>
>> Android support would be very nice but I'd make it a secondary goal.
>> As we have shared libraries now the only big remaining problem is that
>> Android doesn't have real TLS so we'd have to make the GCC EMUTLS
>> implementation work with our GC. For glibc android targets this issue
>> doesn't exist.
>>
>> Would be nice if we can get the dmd test suite results to match those
>> for x86. It will be a little annoying though as many floating point test
>> are wrong and simply assume x86 precision.
>>
>> I'd be glad to help wherever I can though.
>>
>> > > I have two ARM boards at hand, but will need to get round to buying
>> > > a monitor to connect up at least one of them to start off the port
>> > > and testing process. :-)
>> > >
>> > I have two android devices, some STM32 boards and getting a raspberry
>> > or so would not be a problem. I guess qemu could be used too.
>> >
>>
>> qemu + debian for arm might be a good idea. I wonder whether ARM
>> emulated by qemu is faster than e.g. a Raspberry Pi. Compiling GDC on
>> the raspberry itself takes over 12 hours IIRC so you probably want to
>> build cross compilers or use a faster system.
>>
>
> Through testing I've done in the past, QEMU+ARM is reliable enough that
> you can compile + test GCC under it.  Other than that, we can go for using
> cross compilers.
>
>

BTW, QEMU+ARM emulation under x86/x86_64 still takes about 8 hours for GCC.
:-)

-- 
Iain Buclaw

*(p < e ? p++ : p) = (c & 0x0f) + '0';
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