From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-help-return-54562-listarch-gcc-help=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 26390 invoked by alias); 13 Dec 2013 12:04:22 -0000
Mailing-List: contact gcc-help-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-help.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-help/>
List-Post: <mailto:gcc-help@gcc.gnu.org>
List-Help: <mailto:gcc-help-help@gcc.gnu.org>
Sender: gcc-help-owner@gcc.gnu.org
Received: (qmail 26378 invoked by uid 89); 13 Dec 2013 12:04:22 -0000
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-2.0 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2
X-HELO: mail-qe0-f50.google.com
Received: from mail-qe0-f50.google.com (HELO mail-qe0-f50.google.com) (209.85.128.50) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-SHA encrypted) ESMTPS; Fri, 13 Dec 2013 12:04:21 +0000
Received: by mail-qe0-f50.google.com with SMTP id 1so1506917qec.9        for <gcc-help@gcc.gnu.org>; Fri, 13 Dec 2013 04:04:19 -0800 (PST)
MIME-Version: 1.0
X-Received: by 10.224.32.131 with SMTP id c3mr3924718qad.3.1386936259189; Fri, 13 Dec 2013 04:04:19 -0800 (PST)
Received: by 10.140.47.7 with HTTP; Fri, 13 Dec 2013 04:04:19 -0800 (PST)
Date: Fri, 13 Dec 2013 12:04:00 -0000
Message-ID: <CAEvRberzHy4baff4+c=yt4i-HHXSG1u2cZNpDeL5en6V6+HsQw@mail.gmail.com>
Subject: C++ name mangling
From: Philip Herron <redbrain@gcc.gnu.org>
To: GCC <gcc-help@gcc.gnu.org>
Content-Type: text/plain; charset=ISO-8859-1
X-IsSubscribed: yes
X-SW-Source: 2013-12/txt/msg00099.txt.bz2

Hey

I never really looked into this much before but kind of just out of
curiosity where is it implemented. For example: C++ code:

int test (int)...

will generate the gimple:

int test(int) (int x)
{
  int D.2281;

  D.2281 = x + 1;
  return D.2281;
}

But then the aseembler name is:

_Z4testi:

I know you can do SET_DECL_ASSEMBLER_NAME on an fndecl. But not sure
how the mangling is done for C++ is there a convention to the c++
standard or is it compiler specific i imagine it must be some
standard. And where is it implemented in Rust you can do:

#[link_args = "-lreadline"]
extern {
    fn readline (p: *std::libc::c_char) -> * std::libc::c_char;
}

I would like to be able to do something like:

extern "c++" {
}

So then any rust program can call into c++ wrappers maybe? Maybe
leaving out templates and classes. Maybe i can do something like
SET_DECL_ASSEMBLER_NAME (cpp_mangle ("test"))

--Phil
--Phil