Hi Eljay
Thanks for your kind help.
Regards
XiaGuangTai
2007-8-25
On 8/22/07, John Love-Jensen <eljay@xxxxxxxxx> wrote:
> Hi XiaGuangTai,
>
> On my project, we use these tags:
>
> // Windows using VC++
> #define EXPORT __declspec(dllimport)
> #define CLASS_EXPORT
>
> NOTE: VC++ uses a "flippy" EXPORT macro. It's __declspec(dllexport) when
> building the library, and __declspec(dllimport) when using the library.
>
> // Using GCC, with visibility set to "hidden" for the project.
> #define EXPORT __attribute__((visibility("default")))
> #define CLASS_EXPORT __attribute__((visibility("default")))
>
> Then we have classes like:
>
> class CLASS_EXPORT Foo
> {
> public:
> EXPORT Foo();
> EXPORT Foo(int);
> EXPORT Foo(double);
> EXPORT virtual ~Foo();
> };
>
> Is that the sort of declare control you are looking for?
>
> Side note, the CLASS_EXPORT is needed for GCC so the RTTI information is
> externally visible. Otherwise you may run into problems with exception
> handling and typeid.
>
> Sincerely,
> --Eljay
>
>
