CGFloat: round, floor, abs, and 32/64 bit precision

Question

TLDR: How do I call standard floating point code in a way that compiles both 32 and 64 bit CGFloats without warnings?

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CGFloat is defined as either double or fl

Answer 1

You may use those functions from tgmath.h.

#include 

...

double d = 1.5;
double e = floor(d);   // will choose the 64-bit version of 'floor'

float f = 1.5f;
float g = floor(f);    // will choose the 32-bit version of 'floorf'.