Q_DECL_EXPORT keyword meaning

Question

Q_DECL_EXPORT int main(int argc, char **argv)

What does this Q_DECL_EXPORT before int main(...) means?

Answer 1

Its not a keyword, its a macro to encapsulate the different compiler specific keywords to declare a function as being exported.

See also Q_DECL_EXPORT and Creating Shared Libraries.

It is usually used with libraries to define those functions which need to be exported from the library, in order to be imported ("used") by other libraries or by executables.

I have not seen this with a main function so far, but that could be a blackberry specific thing. On the other hand, this tutorial does not use the macro with the main() function either, so it can probably be removed.