6 lines
306 B
Racket
6 lines
306 B
Racket
#lang racket
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(require ffi/unsafe)
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(define libm (ffi-lib "libm")) ; get a handle for the C math library
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; look up sqrt in the math library. if we can't find it, return the builtin sqrt
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(define extern-sqrt (get-ffi-obj 'sqrt libm (_fun _double -> _double)
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(lambda () sqrt)))
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