freebsd-src/lib/libF77/d_acos.c

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#include "f2c.h"
#ifdef KR_headers
double acos();
double d_acos(x) doublereal *x;
#else
#undef abs
#include "math.h"
double d_acos(doublereal *x)
#endif
{
return( acos(*x) );
}