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From: jac@gandalf.llnl.gov (James A. Crotinger)
Newsgroups: comp.lang.c++
Subject: Re: bug with making C++ functions have C linkage ?
Message-ID: <jac.671945423@sundance>
Date: 18 Apr 91 03:30:23 GMT
References: <1991Apr16.122905.23613@cs.nott.ac.uk>
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  I'm not certain, but I believe that in order to use streams, 
the main() program needs to be written in C++. The problem is 
that cout is a globally declared class which must be initialized
before main() is called. This won't happen if the main() is 
written in C. For example, the following works fine on my Sun
(using Sun C 1.0 and Sun C++ 2.0).
-----------------------------------
      // main.cc

      #include <stream.h>

      extern "C" void foo(void);
      extern "C" void bar(void);

      main()
      {
	bar();
      }

      void foo()
      {
	cout << "Testing...\n";
      }
-----------------------------------
      /* bar.c */

      extern void foo();

      void bar()
      {
	foo();
      }
-----------------------------------

  Jim



--
-----------------------------------------------------------------------------
James A. Crotinger     Lawrence Livermore Natl Lab // The above views 
jac@moonshine.llnl.gov P.O. Box 808;  L-630    \\ // are mine and are not 
(415) 422-0259         Livermore CA  94550      \\/ necessarily those of LLNL