Re: How to compile, link and use a C++ extension

Andres Freund <andres@anarazel.de> writes:
> On 2015-08-14 18:38:36 +0200, jacques klein wrote:
>> However I coudn't find any doc. about how to solve the problem of linking
>> C++ code and libs into the .so of my extension,
>> and nothing to solve the runtime-loading problem of the c++ specific .so
>> files ( for ex. to make work a simple usage std::string )

> libstdc++ (or whatever your platform uses) should be automatically
> loaded, I don't think you'll need to worry about that.

Yeah.  The painful issues you're going to face are not that.  They are
memory management (C++ "new" does not talk to palloc or vice versa)
and error handling ("throw" does not interoperate with PG_TRY()).

If you can build a bulletproof interface layer between your C++ code and
the surrounding C-coded backend, you can make it work, but that part won't
be any fun.  There's way too much temptation to just call assorted C-coded
functions from your C++, and *that won't work* with any reliability.

There are discussions of these issues in the pgsql-hackers archives.
        regards, tom lane