Some backends (LLVM, wasm, interp, Rust...) do not know the constants from math.h

[magnetophon]

For example, when I try to compile process = ba.slidingMinN(8,8); I get:

error[E0425]: cannot find value `INFINITY` in this scope

[sletz]

There are still several definitions in maths.lib that do no work with all non C/C++ backends. This INFINITY specific case can probably be solved by added the value explicitly, but this problem has to be revisited more deeply.

[Fr0stbyteR]

Here is a list of functions from maths.lib that are not exist in wasm backend, calling them will result a calling foreign function [func_name] is not allowed in this compilation mode! error.

• ma.cbrt
• ma.hypot
• ma.ldexp
• ma.scalb
• ma.log1p
• ma.logb
• ma.ilogb
• ma.expm1
• ma.erf
• ma.erfc
• ma.gamma
• ma.lgamma
• ma.J0
• ma.J1
• ma.Jn
• ma.Y0
• ma.Y1
• ma.Yn
• ma.isnan
• ma.isinf

They can be "polyfilled" manually, as examples in wasm backend:

isnan(x) = x != x;
isinf(x) = (x == inf) | (x == -inf) with { inf = 2 * ma.INFINITY; };

note: ma.INFINITY returns singleprecision INFINITY = 3.402823466e+38; but not the actual Infinity value, while 2 * ma.INFINITY does.