I want to write an inline function, but I get an error. How can I fix it?
Error information:
Undefined symbols for architecture i386:
"_XYInRect", referenced from:
-[BeginAnimation ccTouchesEnded:withEvent:] in BeginAnimation.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Code:
CGPoint location = CGPointMake(60, 350);
if (XYInRect(location, 53, 338, 263, 369)) {
}
inline BOOL XYInRect(CGPoint location, float MixX, float MixY, float MaxX ,float MaxY){
if (location.x >MixX && location.y >MixY && location.x <MaxX && location.y <MaxY) {
return YES;
} else {
return NO;
}
}
Clang defaults to C99 and not GNU sematics, which means a raw inline
is different from both static inline
and extern inline
.
In particular, a raw inline
means that the function still has external linkage, but the inline definition does not provide the external one (you'd need extern inline
for that).
What this means is that you need an additional extern
definition in a different translation unit or linking will fail. However, you're probably looking for static inline
.
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