From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 6497 invoked by alias); 19 Dec 2017 08:37:53 -0000 Mailing-List: contact libstdc++-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libstdc++-owner@gcc.gnu.org Received: (qmail 1905 invoked by uid 89); 19 Dec 2017 08:37:49 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=2.6 required=5.0 tests=AWL,BAYES_00,KAM_INFOUSMEBIZ,KAM_LAZY_DOMAIN_SECURITY,KAM_SHORT,MISSING_HEADERS,RDNS_DYNAMIC,URIBL_SBL autolearn=no version=3.3.2 spammy=Canadian, canadian, D*info, Present X-Spam-User: qpsmtpd, 2 recipients X-HELO: void-ptr.info Received: from pppoe.185.44.68.223.lanport.ru (HELO void-ptr.info) (185.44.68.223) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Tue, 19 Dec 2017 08:37:47 +0000 Received: from ptr by void-ptr.info with local (Exim 4.72) (envelope-from ) id 1eRDPD-00046X-Dk; Tue, 19 Dec 2017 11:37:43 +0300 Date: Tue, 19 Dec 2017 08:37:00 -0000 From: Petr Ovtchenkov Cc: libstdc++@gcc.gnu.org, gcc-patches@gcc.gnu.org, Jonathan Wakely Subject: Re: [PING^2] [PATCH] Remove CANADIAN, that break compilation for foreign target Message-ID: <20171219113743.69a153a0@void-ptr.info> In-Reply-To: <20171116205537.17680878@void-ptr.info> References: <20170920134459.6f1b2bcf@void-ptr.info> <20171116205537.17680878@void-ptr.info> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2017-12/txt/msg00056.txt.bz2 On Thu, 16 Nov 2017 20:55:37 +0300 Petr Ovtchenkov wrote: > On Wed, 20 Sep 2017 13:44:59 +0300 > Petr Ovtchenkov wrote: > > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71212 > > > > On Fri, 20 May 2016 16:10:50 +0300 > > Petr Ovtchenkov wrote: > > > > > Some old ad-hoc (adding -I/usr/include to compiler > > > flags) break compilation of libstdc++ for foreign > > > target architecture (due to compiler see includes > > > of native). > > Reference for terms: > > https://gcc.gnu.org/onlinedocs/gccint/Configure-Terms.html > > Present of "CANADIAN=yes" lead to inclusion of > headers from build (-I/usr/include). "CANADIAN=yes" used _only_ > to set "-I/usr/include". > > Inclusion of build headers in cross-compilation > process is not a mistake only in case of native (i.e. it is mistake > for cross, for canadian, for crossed native and for crossback), > but sometimes give "success". > > Note, that build/host/target may be different not only due to > different architectures, but due to different sysroots > (libc, kernel, binutils, etc.). > > CANADIAN is set to "yes" by code > > - # If Canadian cross, then don't pick up tools from the build directory. > - # Used only in GLIBCXX_EXPORT_INCLUDES. > - if test -n "$with_cross_host" && > - test x"$build_alias" != x"$with_cross_host" && > - test x"$build" != x"$target"; > - then > - CANADIAN=yes > - else > - CANADIAN=no > - fi > > and it add "-I/usr/include" to compiler flags for building libstdc++. > This is wrong. > > Reference to patch: > https://gcc.gnu.org/ml/gcc-patches/2017-09/msg01332.html