Re: [Openexr-devel] undefined symbol link error

[Nafees Bin Zafar]

I haven't found a nice alternative either.

#ifdef __APPLE_CC__
# define ceilf(a)    ceil(a)
# define floorf(a)   floor(a)
# define fmodf(a,b)  fmod(a,b)
# define fabsf(a)    fabs(a)

# define powf(a,b)   pow(a,b)
# define expf(a)     exp(a)
# define logf(a)     log(a)
# define log10f(a)   log10(a)
# define sqrtf(a)    sqrt(a)

# define drand48()   ((double)rand()/RAND_MAX)
# define srand48(n)  srand((n));

# define sinf(a)     sin(a)
# define sinhf(a)    sinh(a)
# define cosf(a)     cos(a)
# define coshf(a)    cosh(a)
# define tanf(a)     tan(a)
# define tanhf(a)    tanh(a)
# define asinf(a)    asin(a)
# define acosf(a)    acos(a)
# define atanf(a)    atan(a)
# define atanhf(a)   atanh(a)
# define atan2f(a,b) atan2(a,b)
#endif



-n

Darrin Cardani wrote:

> At 8:23 PM -0700 10/15/03, Scott Frankel wrote:
>
> > Many of the new errors I'm getting are from undeclared symbols; i.e.:
> > ::asinf.  They originate in ImathMath.h, included in ImathVec.h.  Is 
> > there
> > a lib file that's not getting read properly, where asinf, atanf, &c. 
> > are declared?
>
>
> The problem is that under OS X, using the apple-supplied libraries, 
> the trig functions for floats don't exist. Only the double versions 
> do. You could define your own functions (or even macros) which just 
> cast the arguments to doubles and call them.
>
> I don't know what the reasoning was for getting rid of the float 
> versions of these functions. It makes it a pain to write AltiVec code 
> that produces identical results to scalar code, for one thing. I've 
> read, though I can't prove it, that working with doubles is faster on 
> PPC than working with single precision floats and that's why they did 
> it. But I've also read about this happening to others as well.
>
> I'm new to using gcc, so I'm sorry to say, I don't know what the 
> answer is other than my suggestion above.
>
> Darrin



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Nafees Bin Zafar        address@hidden
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