问题描述
MinGW是否支持 __ declspec(dllexport)/ __ declspec(dllimport)?即使这样做，我还是应该使用 __ attribute __((visibility("default")))?基本上我应该根据平台或编译器来决定使用什么?
Does MinGW support __declspec(dllexport)/__declspec(dllimport)? Even if it does, should I rather use __attribute__((visibility("default")))? Basically should I decide what to use based on the platform or the compiler?
应该是这样吗?
#ifdef _MSC_VER
# ifdef MYLIB_EXPORTS
# define MYLIB_API __declspec(dllexport)
# else
# define MYLIB_API __declspec(dllimport)
# endif
#else
# define MYLIB_API __attribute__((visibility("default")))
#endif
还是这样?
#if defined(_WIN32) || defined(_WIN64)
# ifdef MYLIB_EXPORTS
# define MYLIB_API __declspec(dllexport)
# else
# define MYLIB_API __declspec(dllimport)
# endif
#else
# define MYLIB_API __attribute__((visibility("default")))
#endif
那 __ declspec(align(16))之类的东西呢? __ attribute __((aligned(16)))?
推荐答案
可见性.dllexport是平台事物，而不是编译器事物.因此，使用 __ declspec(dllexport)/ __ declspec(dllimport)(或 __ attribute __((dllexport))/ __ attribute __((dllimport)))与MinGW一起使用是可行的方法.看: http://gcc.gnu.org/wiki/Visibility#How_to_use_the_new_C.2B-.2B-_visibility_support
Visibility Vs. dllexport is a platform thing, not a compiler thing. So using __declspec(dllexport)/__declspec(dllimport) (or __attribute__((dllexport))/__attribute__((dllimport))) with MinGW is the way to go. See:http://gcc.gnu.org/wiki/Visibility#How_to_use_the_new_C.2B-.2B-_visibility_support
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