Date: Wed, 25 Apr 2001 09:30:44 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Alistair_P SHILTON <apsh AT ecr DOT mu DOT oz DOT au>
cc: djgpp AT delorie DOT com
Subject: Re: selectively turning off function name mangling in C++
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On 25 Apr 2001, Alistair_P SHILTON wrote:

> I was wondering if it is possible to tell gxx to not mangle the names of
> certain functions?

That's what ``extern "C"'' is for.

> I've been trying to interface some of my C++ code with
> some fortran code I downloaded of the net.  g77 mangles its function names
> by adding _'s to start and finish (so foo becomes _foo_).  But gxx mangles
> the same function to _foo__*** (*** = annoying junk) - which stops the .o
> files from linking correctly!

When you call your Fortran functions from C++, use the g77-mangled name, 
and declare a prototype for those functions with ``extern "C"''.  For 
example:

  extern "C" double _foo_ (int *, double *);
  ...
  double value = _foo_ (bar, baz);