Eclipse C++ Project references

[gvanto]

I was wondering if someone could help me out as a C++ newbie (also newbie in C++ in Eclipse) I'm from a Java background, and within eclipse (running on Kubuntu) when I set external Java projects as references to a project, I can simply do "import externalClass;" and voila, i can use that class in the current project ... This doesn't seem to be the case for C++ ... I've created a new project as a SharedLibrary -> Empty Project Then created my class, say MyClass in this project, say project A. (then built it) Now in project B (new project -> empty project but not shared lib) I want to use the class created in A (which i have set as a project reference in B) but #include MyClass.h throws an error. Am I missing something fundamental with how C++ shared libraries work? Help would be much appreciated, gvanto the noob

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[Stuart Dootson]

gvanto - it helps to tell us what error occurs (I presume it's a compiler error, that it can't see MyClass.h?) Anyway - building against a library in C/C++ requires that you specify two things - the source-code interface (that's MyClass.h in your case) and an object-code interface (hmmmm - Linux - that'll either be a .a or some shared thing - a .so file? - my only *nix experience is with OS X - which is probably close enough!). You also need to ensure that the directory in which these files live is specified. That means telling project B what directory contains project A's header file(s) and what directory contains project A's library file(s). The header file directory option will live with compiler options, while the library file directory option will live with linker options - I've never used Eclipse (with CDT?), so I can't be more exact than that. Anyway - give us a bit more detail and maybe we can sort you out!

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[CPallini]

(I suppose you're using the g++ compiler) see [^]. :)

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[gvanto]

Thanks for the link. Some useful fundamental stuff in there. But a tutorial on using shared C++ libs in eclipse, from start to end and cover things like: which header files to put where? - which project reference to select, which directory structure to use, etc would be good. (Just a simple example would be amazing) This one here comes close: http://janmagnet.wordpress.com/2007/09/30/eclipse-cdt-and-shared-libraries/[^] I followed that tutorial exactly and still I simply get a "make: *** [WLFeeder] Error 1, Type: C/C++ Problem " problem ... Double-clicking it doesn't do anything, no more info, thats it. If someone who knows how to use CDT in eclipse can make one project reference another (containing a class that needs to be used) it would be really really awesome. I'm left stumped. gvanto

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modified on Thursday, February 12, 2009 6:55 PM

[gvanto]

ok found the problem: was using shared instead of static library! thanks guys for your help!! gvanto

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