From patchwork Mon May 20 17:07:33 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Monakov X-Patchwork-Id: 245076 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]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "localhost", Issuer "www.qmailtoaster.com" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 9C07B2C00A2 for ; Tue, 21 May 2013 03:11:28 +1000 (EST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:date :from:to:cc:subject:in-reply-to:message-id:references :mime-version:content-type; q=dns; s=default; b=dcNvyWI+e3MB7Gdj qmooeV9cYQ8UnHaiGh/OsxIgnKLY1oHj5tJW6q9q0JW07DPFAnkBgJ4RLnMAgEB/ Aezq/ydpyxbwrr8fPre8MLm0m6zv10K5s6LPPomcAFqLvlwSa32BfATn6oBV7PSM DJSBa72h9DZlq/wgx/xnUgha89s= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:date :from:to:cc:subject:in-reply-to:message-id:references :mime-version:content-type; s=default; bh=jDD8XASZW+g96SWSsaHoNj g/HaU=; b=JmM1q0CvThK+WHOHrRGCB6X0ZhvGZs0FJ4km9nSThXQK7oD5b/PjPQ qqLH+XBAjdVRMYPIEkj/aws5cOjOZD+Wgpa7EHMhFHrZ64OPdYql249ytHCUc/+w Ef2wemk3qjfq+13AM6XE9hpbCH31MXTS4KXKDBSjI924IrOYu27UE= Received: (qmail 4752 invoked by alias); 20 May 2013 17:11:21 -0000 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 Received: (qmail 4739 invoked by uid 89); 20 May 2013 17:11:20 -0000 X-Spam-SWARE-Status: No, score=-2.3 required=5.0 tests=AWL, BAYES_40, KHOP_THREADED, RP_MATCHES_RCVD autolearn=ham version=3.3.1 Received: from smtp.ispras.ru (HELO smtp.ispras.ru) (83.149.199.79) by sourceware.org (qpsmtpd/0.84/v0.84-167-ge50287c) with ESMTP; Mon, 20 May 2013 17:11:15 +0000 Received: from [10.10.3.121] (unknown [83.149.199.91]) by smtp.ispras.ru (Postfix) with ESMTP id 5449E22221; Mon, 20 May 2013 21:11:12 +0400 (MSK) Date: Mon, 20 May 2013 21:07:33 +0400 (MSK) From: Alexander Monakov To: Ian Lance Taylor cc: gcc-patches@gcc.gnu.org, Ian Lance Taylor Subject: Re: [PATCH,RFC] Make libbacktrace more standalone In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (LNX 1167 2008-08-23) MIME-Version: 1.0 I now realize that a less intrusive approach is available: just provide replacement filenames.h, dwarf2.h in a separate directory and pick up those headers for a standalone build. In replacement dwarf2.h, include system dwarf.h, #define potentially missing enum values and provide dummy enum tags. The downside is that GCC complains about using variables of dummy enum types in comparisons and switch statements, necessitating -Wno-switch and -Wno-enum-compare. Build system dependencies are a bigger problem that is beyond "scratching my own itch" at the moment (I have to provide a CMake build script anyhow). The below is what I submitted to import libbacktrace in the APITrace project. I'm not sure whether it makes sense to commit it in GCC: it's not particularly useful without the standalone CMake build script. Alexander diff --git a/libbacktrace/auxincl/dwarf2.h b/libbacktrace/auxincl/dwarf2.h new file mode 100644 index 0000000..d135d8a --- /dev/null +++ b/libbacktrace/auxincl/dwarf2.h @@ -0,0 +1,52 @@ +/* dwarf2.h -- minimal GCC dwarf2.h replacement for libbacktrace + Contributed by Alexander Monakov, ISP RAS + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + (1) Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + (2) Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + + (3) The name of the author may not be used to + endorse or promote products derived from this software without + specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR +IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, +INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING +IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. */ + +#ifndef BACKTRACE_AUX_DWARF2_H +#define BACKTRACE_AUX_DWARF2_H + +/* Use the system header for the bulk of the definitions. */ +#include + +/* Provide stub enum tags. */ +enum dwarf_attribute {_dummy_dwarf_attribute}; +enum dwarf_form {_dummy_dwarf_form}; +enum dwarf_tag {_dummy_dwarf_tag}; + +/* Define potentially missing enum values. */ +#define DW_FORM_GNU_addr_index 0x1f01 +#define DW_FORM_GNU_str_index 0x1f02 + +#define DW_FORM_GNU_ref_alt 0x1f20 +#define DW_FORM_GNU_strp_alt 0x1f21 + +#define DW_LNS_extended_op 0 + +#endif diff --git a/libbacktrace/auxincl/filenames.h b/libbacktrace/auxincl/filenames.h new file mode 100644 index 0000000..000dd30 --- /dev/null +++ b/libbacktrace/auxincl/filenames.h @@ -0,0 +1,40 @@ +/* filenames.h -- minimal GCC filenames.h replacement for libbacktrace + Contributed by Alexander Monakov, ISP RAS + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + (1) Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + (2) Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + + (3) The name of the author may not be used to + endorse or promote products derived from this software without + specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR +IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, +INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING +IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. */ + +#ifndef BACKTRACE_AUX_FILENAMES_H +#define BACKTRACE_AUX_FILENAMES_H + +/* Assume POSIX paths. */ + +#define IS_DIR_SEPARATOR(c) ((c) == '/') +#define IS_ABSOLUTE_PATH(f) ((f)[0] == '/') + +#endif