This is the mail archive of the
ecos-discuss@sourceware.cygnus.com
mailing list for the eCos project.
Re: CYG_INSTRUMENT_CLOCK+PowerPC+FPU problem.
>>>>> "Sergei" == Sergei Organov <osv@javad.ru> writes:
Sergei> Jesper Skov <jskov@redhat.com> writes: [...]
>> I just had an idea. Maybe we could change the CYG_UNUSED_PARAM to:
>>
>> #define CYG_UNUSED_PARAM(_type_, _var_) \ if (0) { if ((_var_) ==
>> (_var_)); }
>>
>> That would always work without any overhead, wouldn't it?
Sergei> Only if optimization is turned on ;-)
That's true. But if compiling without optimization, you probably don't
care about spurious instructions :)
Sergei> This also requires _type_ to have operator '==' (not the case
Sergei> for structs).
Sergei> The obvious replacement
Sergei> if (0) { (_var_) = (_var_); }
What about
#define CYG_UNUSED_PARAM(_type_, _var_) \
if (0) { if (((CYG_ADDRESS)&(_var_)) != ((CYG_ADDRESS)&(_var_))); }
Is there anything you cannot take the address of?
Jesper