Optimized compiling with CPML problem

[nshimizu@bosei.cc.u-tokai.ac.jp (nshimizu)]

Hi,

I am evaluating the CPML under the Debian/slink on EB164.
I ususaly does not include <cpml.h> for stable results but <math.h>.

I found that when I use "atan" with optimize option
the link will cause a problem.
The linker claims that there is no __atan2 entry.

I checked the /usr/include/math.h and found 

-----------------------------------------------------------------------
/* Get machine-dependent inline versions (if there are any).  */
#if (!defined __NO_MATH_INLINES && defined __OPTIMIZE__) \
    || defined __LIBC_M81_MATH_INLINES
#include <__math.h>
#endif
-----------------------------------------------------------------------

And in the __math.h there is a definition:

-----------------------------------------------------------------------
extern __inline double
atan (double __x)
{
  extern double __atan2 (double, double);
  return __atan2 (__x, 1.0);
}
-----------------------------------------------------------------------

Does anyone know why this definition is here only for __OPTIMIZE__?

I think it does not help much even with libm or libffm. And I want
to remove the definition. For my machine I will remove it immediately.

Thank you,

Naohiko Shimizu