Re: [Openexr-devel] undefined symbol link error

[Darrin Cardani]

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
--
Darrin Cardani - address@hidden
President, Buena Software, Inc.
<http://www.buena.com/>
Video, Image and Audio Processing Development