How to properly inline for static libraries

Question

I\'m re-writing a small C math library of mine that will end up as a static library for the user and would like to benefit from inlining for my vector math interface.

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Answer 1

You should define your function as static inline in the .h file:

static inline float clampf( float v, float min, float max )
{
    if( v < min ) v = min;
    if( v > max ) v = max;

    return v;
}

The function must be absent in the .c file.

The compiler may decide not to inline the function but make it a proper function call. So every generated .o file may contain a copy of the function.