问题
In my application I am using Box2D and Spidermonkey. Both libraries are defining the type uint32, which obviously gives me a compiler-error when using both in the same compilation unit.
b2settings.h (Box2D): typedef unsigned int uint32;
jsotypes.h (Spidermonkey): typedef unsigned long uint32;
Is there any way to resolve this collision without needing to change the headers of the 3rd-party libraries?
I am thankful for every hint!
回答1:
You can do this hack:
#define uint32 Box2D_uint32
#include "Box2D.h"
#undef uint32
#define uint32 Spider_uint32
#include "Spidermonkey.h"
#undef uint32
Since typedef is merely an alias, this shouldn't cause ODR violation as long as these headers contain declarations only. If there is a (struct or inline function) definition that uses uint32, it will violate ODR. Although your compiler probably isn't smart enough to detect this and it still will work.
But a better choice is to report the problem to the library developers so they will fix that with, e.g. namespaces.
来源：https://stackoverflow.com/questions/4416932/typedef-redefinition-c2371-for-uint32-in-two-3rd-party-libraries