#ifdef _CRAY /* kludge around Cray STDC compiler */
double (*log_p)() = log;
#define log ((*log_p))
double (*exp_p)() = exp;
#define exp ((*exp_p))
double (*sqrt_p)() = sqrt;
#define sqrt ((*sqrt_p))
double (*log10_p)() = log10;
#define log10 ((*log10_p))
double (*atan2_p)() = atan2;
#define atan2 ((*atan2_p))
double (*asin_p)() = asin;
#define asin ((*asin_p))
double (*acos_p)() = acos;
#define acos ((*acos_p))
double (*atan_p)() = atan;
#define atan ((*atan_p))
double (*sin_p)() = sin;
#define sin ((*sin_p))
double (*cos_p)() = cos;
#define cos ((*cos_p))
double (*tan_p)() = tan;
#define tan ((*tan_p))
double (*pow_p)() = pow;
#define pow ((*pow_p))
#endif /* _CRAY */
Какой в этом смысл?
