Re: static/shared linking with C and C++

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#3553

From: Jean-Marc Bourguet
Date: Tue, 19 Nov 2002 15:39

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"@please@no.spam" <""ddrav\"@please@no.spam"> writes:

> Now I'm trying to add a program written in C++ to the suite. I find
> that if I compile libutil.a with gcc the C++ program can't link with
> it (unresolved references) and if I compile it with g++ the C
> programs can't use it. Do I need to keep two versions around or is
> there some magic switch I'm missing?

This is a pure C++ question.  You should put 

#ifdef __cplusplus
extern "C" {
#endif

...
#ifdef __cplusplus
}
#endif

around your header.  After this you should be able to compile the
library with the C compiler and link it to C++ programs (always using
the C++ compiler to do the link).

Without the extern "C" stuff, C++ compiler "mangles" the function
names (for several raisons, most notable beeing: preventing linking
code compiled using different ABI and beeing able to do overloading).

Yours,

-- 
Jean-Marc

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Newsgroups: comp.unix.programmer,gnu.gcc.help
Subject: Re: static/shared linking with C and C++
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From: Jean-Marc Bourguet <jm@bourguet.org>
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Date: 19 Nov 2002 16:39:04 +0100
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