[oe] powerpc-g++ 4.2.4 problem casting long long to double

[Vitus Jensen]

On Fri, 21 May 2010, Vitus Jensen wrote:

> On Fri, 21 May 2010, Vitus Jensen wrote:
>
>>  On Wed, 19 May 2010, Koen Kooi wrote:
>> >   On 19-05-10 17:46, Vitus Jensen wrote:
>> > >   On Wed, 19 May 2010, Vitus Jensen wrote:
>> > > >   On Wed, 19 May 2010, Gary Thomas wrote:
>> > > > >    On 05/19/2010 03:38 AM, Vitus Jensen wrote:
>
> ...
>> > >   So currently .dev should be unbuildable for ppc users?  Without
>> > >   selecting a non-default compiler that is.
>> > 
>> >   I thought I pinned powerpc at 4.1.1, but it turns out that it was only
>> >   for ppc405:
>> > 
>> >   ANGSTROM_GCC_VERSION_ppc405         ?= "4.1.1"
>> > 
>> >   Feel free to send patches to add that for other ppc platforms.
>>
>>  I'd loved to but it should be a usable version for ppc603e.  We have used
>>  ELDK gcc 3.3.3 in the past so that version would be a known good one.
>>
>>  [stable/2009]
>>  4.2.4  wrong result
>>  4.1.1  wrong result (see first posting)
>>  3.3.3  doesn't compile, obstack macro problem
>>  3.3.4  doesn't compile, signal.h stack_t problem
>>
>>  [org.openembedded.dev]
>>  4.3.3  doesn't compile
>>  4.1.1  doesn't compile
>>  4.2.4  doesn't compile, libstdc++ problem
>>
>>  All compilations in the .dev branch used MACHINE=n1200, in stable I used
>>  our bluepro.  Always a clean build of meta-toolchain.  I know that there
>>  are currently problems in .dev so I will wait/monitor the list and try to
>>  get 3.3.3 and something newer than 4.3.3. to compile.
>
> Faster than thought: 4.4.4 compiles for n1200 (ppc603e) on .dev and produces 
> correct output.  (double)(long long)10 equals 10.0.

Only at -O2 and -O3, at those levels the internal function __floatdidf 
isn't called (previously it was only -O3).  At -O1 and below it is called 
and still produces incorrect results :-( Oh well, I give up for now.

Vitus

-- 
Vitus Jensen, Hannover, Germany, Universe (current)
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