Code optimization issue Xcode 7

Hi,

I have run into a new problem that started happening once I moved from Xcode 6 to Xcode 7.

I am using a framework called Cocos2d-x using C++.

I am getting strange results when compiling with any code optimization above -C0.

I use a macro called CC_SYNTHESIZE to simply create getters/setters for a variable.

The macro is defined like this:

#define CC_SYNTHESIZE(varType, varName, funName)\ 
protected: varType varName;\ 
public: virtual varType get##funName(void) const { return varName; }\ 
public: virtual void set##funName(varType var){ varName = var; }

Here is an example of usage:

CC_SYNTHESIZE(bool, gravityFlipped_, GravityFlipped);

Without code optimization this works as intended, but with code optimization enabled this variable and others act erratically and does not change when the set function is called.

If I replace the macro and instead write the code manually it works with code optimization enabled.

protected: bool gravityFlipped_; 
public: virtual float getGravityFlipped(void) const { return gravityFlipped_; } 
public: virtual void setGravityFlipped(float val) { gravityFlipped_ = val; }

Any idea what the underlying problem could be or any steps for troubleshooting?

Thanks,

Rob