CODEWITHSUNDEEP
objective-ccfunctioninline
Stas Jaro
Stas Jaro

Reputation: 4885

Why can't I make this function inline?

If I make this function inline and call it from a objective-c method, it gives me a clang: error: linker command failed with exit code 1 (use -v to see invocation)

Vector addv(Vector v1, Vector v2) {// works
    return (Vector){v1.x + v2.x, v1.y + v2.y, v1.z + v2.z};
}

inline Vector addv(Vector v1, Vector v2) {// if I call this, does not build
    return (Vector){v1.x + v2.x, v1.y + v2.y, v1.z + v2.z};
}

Why is it doing this, and what can I do to fix it?

Upvotes: 2

Views: 187

Answers (1)

Jens Gustedt
Jens Gustedt

Reputation: 78943

C99 inline doesn't guarantee that a linker symbol is emitted. You'd have to place an "instantiation" in just one compilation unit (that is a .c).

So the inline definition in the .h file:

inline Vector addv(Vector v1, Vector v2) {// if I call this, does not build
    return (Vector){v1.x + v2.x, v1.y + v2.y, v1.z + v2.z};
}

and 

Vector addv(Vector v1, Vector v2);

in one .c file to generate the symbol.

Upvotes: 3

Related Questions