Craig Ringer <cr...@postnewspapers.com.au> writes:
> There's lots more information about this on the Internet. Just look for
> generic resources on calling C from C++ and vice versa.

> (I don't *think* there are any issues with libstdc++, though you'd
> probably have to make sure that no other program linked into Pg brings
> in a different version of libstdc++.)

I believe this is fairly platform-dependent.  On platforms where the
standard libc includes everything you need for C++, you'd likely be okay,
but we've seen problems on (possibly obsolete?) platforms where it
doesn't.  One thing you've got to be really wary of is C++ exceptions,
which tend not to interoperate nicely with PG's longjmp-based error
handling.

My own advice is to think twice about how badly your function needs to
be C++ rather than plain C.

                        regards, tom lane

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