From patchwork Thu Dec 20 09:55:44 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tobias Burnus X-Patchwork-Id: 207643 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) by ozlabs.org (Postfix) with SMTP id 53E602C0040 for ; Thu, 20 Dec 2012 20:56:06 +1100 (EST) Comment: DKIM? See http://www.dkim.org DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=gcc.gnu.org; s=default; x=1356602166; h=Comment: DomainKey-Signature:Received:Received:Received:Received: Message-ID:Date:From:User-Agent:MIME-Version:To:Subject: Content-Type:Mailing-List:Precedence:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:Sender:Delivered-To; bh=MJLO4ce lOBL7v+kA9pohLwwgUAY=; b=JFoOhhAfRRiaiHo+F/rpaluOKdJPhBuxAkCacST do8OFS5cyGsABfR3IFoFwGF2tLkoUPfobvTh54aNrir5+8iiEDsfwjK3XgU/szGe p6k0/dXavu3Znw++wPtnZ45KL1qBKiA2k1ZFzX35uXdRFo9zZgy19Up4NQwxC9Y1 bWZk= Comment: DomainKeys? See http://antispam.yahoo.com/domainkeys DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=gcc.gnu.org; h=Received:Received:X-SWARE-Spam-Status:X-Spam-Check-By:Received:Received:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:Content-Type:Mailing-List:Precedence:List-Id:List-Unsubscribe:List-Archive:List-Post:List-Help:Sender:Delivered-To; b=xt8DSO+np1J91PEnt0fJkaWuZPto2QFB/4cj3aMNkyvO9rK8Djoy8WX+udnBXE yOnGJtiGBCKWIFVisHWWrRNXYSII4k/HF83hHFA9I4Jg9X0T0AFAeKcAWCoobL+h OcHNrNGOaTFlFIkjTbVpmoOw8TjltFq9cTeEESldpA7dM=; Received: (qmail 24744 invoked by alias); 20 Dec 2012 09:55:54 -0000 Received: (qmail 24725 invoked by uid 22791); 20 Dec 2012 09:55:53 -0000 X-SWARE-Spam-Status: No, hits=-2.2 required=5.0 tests=AWL, BAYES_00, RCVD_IN_DNSWL_NONE X-Spam-Check-By: sourceware.org Received: from mx01.qsc.de (HELO mx01.qsc.de) (213.148.129.14) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 20 Dec 2012 09:55:46 +0000 Received: from archimedes.net-b.de (port-92-195-17-106.dynamic.qsc.de [92.195.17.106]) by mx01.qsc.de (Postfix) with ESMTP id 900CE3CE66; Thu, 20 Dec 2012 10:55:44 +0100 (CET) Message-ID: <50D2E0A0.7000201@net-b.de> Date: Thu, 20 Dec 2012 10:55:44 +0100 From: Tobias Burnus User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: gcc patches , gfortran , Gerald Pfeifer Subject: [Patch, wwwdocs] Update Fortran part of the GCC 4.8 release notes Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Delivered-To: mailing list gcc-patches@gcc.gnu.org The following patch updates the Fortran part of the GCC 4.8 release notes at http://gcc.gnu.org/gcc-4.8/changes.html#fortran It adds quips for - CLASS(*) - The new BACKTRACE intrinsic - A compatibility notice I would like if someone could comment on the latter. I think it is time to explicitly inform about compatibility issues with gfortran. So far, smaller ABI changes were done all the time [affecting very special cases or very experimental features] and the .mod version was different in every release. (The smaller ABI changes were related to code which required modules, hence, the .mod version change forced users to re-compile. In fact, the .mod version change in 4.8 has just be done to force recompilation.* Thus, the past ABI breakages were and this ABI breakage is very unlikely to lead to run-time/link-time issues.) Comments? Suggestions? Tobias * The background for 4.8's ABI changes were: The module name was missing from module-defined procedure-pointer variables, leading to a potential naming clash with same-name variables in different modules. And the deferred-length string ABI was changed as some systems didn't like a "." in the assembler name of a variable. Index: changes.html =================================================================== RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.8/changes.html,v retrieving revision 1.73 diff -p -u -r1.73 changes.html --- changes.html 19 Dec 2012 21:54:50 -0000 1.73 +++ changes.html 20 Dec 2012 09:43:10 -0000 @@ -243,6 +243,35 @@ B b(42); // OK

Fortran

    +
  • Compatibility notice: +
      +
    • Module files: The version of the module files (.mod) + has been incremented. Fortran MODULEs compiled by earlier + GCC versions have to be recompiled, when they are USEd by + files compiled with GCC 4.8, because GCC 4.8 is not able to read + .mod file of earlier GCC versions; attempting to do so + gives an error message. Note: The ABI of the produced assembler data + itself has not changed; object files and libraries are fully compatible + to older versions. (Except as noted below.)
      • +
    • ABI: Some internal names (name in the assembler/object file) have + changed for symbols declared in the specification part of a module. + If the module – or a file using such a symbol via use + association – is recompiled, the module and all files which + directly use such symbols have to be recompiled. The change only + affects the following kind of module symbols: +
        +
      • Procedure pointers. Note: C-interoperable function pointers + (type(c_funptr)) are not affected nor are + procedure-pointer components.
        • +
      • Deferred-length character strings.
        • +
      • +
    • + +
  • The + BACKTRACE intrinsic subroutine has been added. It shows + a backtrace at an arbitrary place in user code; program execution + continues normally afterwards.
    • +
  • The -Wc-binding-type warning option has been added (disabled @@ -301,6 +330,12 @@ B b(42); // OK user manual.
    • +
  • Fortran 2003: +
  • Experimental support for unlimited polymorphic variables + (CLASS(*)) has been added.
    • +
      +
    +
  • TS 29113:
    • Assumed types (TYPE(*)) are now supported.