Re: Bison complains about undefined reference of my own data type

[Samuel Tardieu]

>>>>> "Laurence" == Laurence Finston <address@hidden> writes:

Laurence> One thing you might have to look out for is "name-mangling"
Laurence> which C++ compilers do.  You might have to turn it off for C
Laurence> code by specifying C-linkage, e.g., "extern "C" foo(void);".
Laurence> I've never had to do this for my own code, but I've seen it
Laurence> in other people's.  I would have to review when it's
Laurence> necessary; I don't know off the top of my head.

You need to do it to interface to any library written in C (such as
the standard C library for example). For example, try the following
C++ code with and without 'extern "C"'. Without it, you won't be able
to link. Fortunately, all your system headers already provide you with
'extern "C"' by default.

extern "C" void exit(int);
int main()
{
  exit(0);
}