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From: fs8j@hopper.cs.Virginia.EDU (Fraser M. Street)
Newsgroups: comp.lang.c++
Subject: Help! calling C++ functions from a C main program
Message-ID: <1991Apr15.163426.14250@murdoch.acc.Virginia.EDU>
Date: 15 Apr 91 16:34:26 GMT
Sender: usenet@murdoch.acc.Virginia.EDU
Reply-To: fs8j@hopper.cs.Virginia.EDU (Fraser M. Street)
Organization: University of Virginia
Lines: 23

Hi - I'm desperate for help.

I have a C graphics application that, due to the nature of the source code,
can only be compiled with a C compiler.  I now need to use a relatively 
elaborate C++ class library to generate some data that will be used by 
my graphics code.  All this code needs to be linked into one executable.

I understand how to call a C function from a C++ main program (using 
"extern "C" foo();"), but I don't know how to make it work in the other
direction - i.e. call my C++ foobar() function from my main.c file.  I
have tried separately compiling and linking the two .o files but the
linker can't 
resolve the C++ function names.

Is there a way for me to do this?


Our environment is a network of SUN3 and SUN4 machines, all running Unix.
The available compilers at this site are cc, CC, gcc, g++, and Saber C++.

Please E-mail me any ideas.  Thanks in advance.  The project's due Friday!!

Fraser