Missing functions for floats

I've been trying to use the Cephes floating point lib,
(http://www.netlib.org/cephes/) but get the following
errors:

?ASlink-Warning-Undefined Global ___fs2ulong_rrx_s
referenced by module sinf
?ASlink-Warning-Undefined Global ___ulong2fs_rrx_s
referenced by module sinf
?ASlink-Warning-Undefined Global ___fs2sint_rrx_s
referenced by module sinf
?ASlink-Warning-Undefined Global ___sint2fs_rrx_s
referenced by module sinf

Sample code:
extern float z1(void);
float fun( void )
{
unsigned long i;
float f;
i=5.5 * z1();
f=i;
if (i & 1)
f += 1.0;
return f;
}

Tested with Jan. 07 snapshot, MingW, sdcc -mz80