Simplify foreign symbol imports/exports, similar to C/C++ dynamic library headers

[Bagellll]

Hello, let me explain what I mean in the title. Something I quite like about dynamic libraries, or even static ones, is the ease of use when it comes to library functions/methods.

Put simply, what I mean is that a macro like this is all I need for implicit imports/exports.

#ifdef _EXPORT
#define MYAPI __declspec(dllexport)
#else
#define MYAPI __declspec(dllimport)
#endif

MYAPI void foo();

or this syntax for GNU

#ifdef _EXPORT
#define MYAPI __attribute__((visibility("default")))
#else
#define MYAPI
#endif

MYAPI void foo();

In Odin, I'm unaware if there's an equivalent. I believe it would be beneficial for one to be considered if not. I'd be willing to submit a more formal proposal or PR if that's something that sounds interesting. The way collections are at the moment, something like this would probably require another command line argument to give the compiler a notion of an "external" symbol from a collection. Mainly I'm looking for something more ergonomic than using foreign and redefining function signatures again.

My idea of implementation would be to use the already existing export attribute, modify the import statement, and add a command line argument. The compiler would import both exported symbols and all types from the package; potentially inline functions.

Suggested syntax would be something along the lines of this:

import foreign "example:my_package1"

import foreign mp "example:my_package2"

or this:

foreign import "example:my_package1"

foreign import mp "example:my_package2"

TL;DR: Suggesting implicit foreign functions to deal with libraries better, akin to an API macro in C/C++