NetNews Usenet Archive 1992 #16/NN_1992_16.iso/spool/comp/lang/c/11779

Text File | 1992-07-30 | 1.6 KB | 40 lines

Path: sparky!uunet!mcsun!news.funet.fi!hydra!klaava!wirzeniu
From: [e-mail] (Lars Wirzenius)
Newsgroups: comp.lang.c
Subject: Re: linking gcc code with CC code
Keywords: link
Message-ID: <[e-mail]>
Date: 30 Jul 92 20:40:44 GMT
References: <[e-mail]>
Organization: University of Helsinki
Lines: 28

[e-mail] (Karthik P Sheka) writes:
>Is it possible to link gcc created object files with CC created object
>files?

That depends on which CC and which version gcc and which operating
system and on the phase of the moon.  Cross-language calling is always
dependent on these (and other) factors, even for closely related
languages such as C and C++.  You can't even be certain that you can
call subroutines in the same language, if they are compiled with
different compilers (or even using different settings with the same
compiler).

Could you translate everything to C or C++ and use only one compiler?
This is often the easiest solution.

>I've tried doing so but it seems that the c functions cannot call
>the c++ functions,

Probably not.  C++ names are usually mangled so that type information
(needed for overloading) is encoded into the name (as the linker sees
it).  However, your sample code shows that there may be other problems
as well: routine2 is declared (and defined) static in one file and
extern in an other.  I assume you meant that both declarations refer to
the same function, so you have to change the static declaration and
definition to be global (just remove the statics).

--
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