Thread: Need pointing to a guide for importing/exporting library functions

I already have this but I sense I'm missing something so I'd like to be pointed to a proper article/document on this sorta thing.

Code:

#if defined( __GNUC__ ) || defined( __GNUP__ )
#define PP_ATTR( TYPE ) __attribute__( TYPE )
#ifndef _PRAGMA
#define _PRAGMA( COMMAND ) _Pragma( #COMMAND )
#endif
#else
#define PP_ATTR( TYPE )
#endif

#ifdef _WIN32
#define PP_DECLSPEC( TYPE ) __declspec( TYPE )
#define PP_LIB_EXP __declspec( dllexport )
#define PP_LIB_IMP __declspec( dllimport )
#else
#define PP_DECLSPEC( TYPE )
#define PP_LIB_EXP PP_ATTR((__visibility__("default")))
#define PP_LIB_IMP
#endif

By the way I did try searching already but my efforts keep coming up empty

awsdert, what's the actual problem/task at hand?

Are you asking for help on managing tricky, compiler/OS/architecture-specific macros, or information on how to manage the entire build process for a portable library?

Ah no this is intended to be use on the app I mentioned in earlier threads, the app itself is intended to be cross-platform so I'm trying to iron out most of the issues that would reduce portability.
I figured that the above was the only relevant code for this particular thread, for the most part the main OS's I'm targeting by myself are (in order of priority) Windows/ReactOS, UNIX, POSIX, OSX.

I'm not asking for help on managing the build process, if you read the title then you'll see what I want, I'm sure there's plenty of documentation on this I just need some help locating the information, PP_LIB_EXP and PP_LIB_IMP are going to be used by custom libraries relying on a pre-processor only header containing their defines.

Ah I guess you didn't get what I was trying to do with the macros entirely but thank you, I honestly thought I had missed something. For reference this is the intended end result:

Code:

#ifdef BUILD_EXT_LIB
#define EXT_LIB_API PP_LIB_EXP
#else
#define EXT_LIB_API PP_LIB_IMP
#endif

One of my shared libraries is used by both the app and the extension library so this type of macro is helpful there, also the _PRAGMA is defined elsewhere if not defined here, it is for use with macros of this style:

Code:

#ifdef _OPENMP
#define PP_OMP( COMMAND ) _PRAGMA( omp COMMAND )
#else
#define PP_OMP( COMMAND )
#endif

Well good night, I got work tomorrow, probably won't be checking this thread for a while so any posts should be done as a closure type post.

Nah that won't be a problem, I've got a struct which each module needs to fill part of with their pointers and return via a single recognisable function, the other part has to be filled by the application so that the 2 are able to communicate properly.