I am really close to getting my scanner to work with NetBSD/macppc 
  but now I seem to be tripping over some math functions. I had 
errors on "pow" being undefined, so we swapped them out for "log" 
functions. And I get the same result.

/usr/pkg/lib/sane/libsane-umax.so.1: Undefined PLT symbol "log" 
(reloc type = 21, symnum = 31)

Here are the lines affected:
   /*
   return( (int) 255 * pow(  ((double) light)/255.0 , 
(1.0/analog_gamma) )+.5 );
   */
   return( (int) 255 * exp(  log( ((double) light)/255.0) / 
analog_gamma)+.5 );


/*
   scanner->output_range.max   = (int) pow(2, 
scanner->val[option].w) - 1;
*/
   scanner->output_range.max   = (int) exp(log(2) 
scanner->val[option].w)
- 1;


so what's with libm and how to fix it?