[{"id":3669032,"web_url":"http://patchwork.ozlabs.org/comment/3669032/","msgid":"","list_archive_url":null,"date":"2026-03-25T11:52:13","subject":"Re: [PATCH] support: add __address_diff function","submitter":{"id":14312,"url":"http://patchwork.ozlabs.org/api/people/14312/","name":"Florian Weimer","email":"fweimer@redhat.com"},"content":"* Yury Khrustalev:\n\n> diff --git a/support/pointer-arith.h b/support/pointer-arith.h\n> new file mode 100644\n> index 0000000000..fc9cf593ac\n> --- /dev/null\n> +++ b/support/pointer-arith.h\n> @@ -0,0 +1,31 @@\n\n> +#ifndef _POINTER_ARITH_H\n> +#define _POINTER_ARITH_H 1\n> +\n> +#include \n> +#include \n> +\n> +#ifdef __ARM_ARCH_ISA_A64\n> +ptrdiff_t __address_diff (const void *lhs, const void *rhs);\n> +#else\n> +#define __address_diff PTR_DIFF\n> +#endif /* __ARM_ARCH_ISA_A64 */\n> +\n> +#endif\n\nGiven that it's in support/, it should probably be called\nsupport_address_diff or something. We don't use __ mangling under\nsupport/.\n\nThe #ifdef is not necessary, sysdeps overrides should work for support/\nheaders. The comment should say that the difference is computed in\nbytes, not elements.\n\nThanks,\nFlorian","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","libc-alpha@sourceware.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","libc-alpha@sourceware.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=Fu6/tirC;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=pass (1024-bit key,\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=Fu6/tirC","sourceware.org; dmarc=pass (p=quarantine dis=none)\n header.from=redhat.com","sourceware.org; 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s=key; t=1774439541; cv=none;\n b=iALQNsYTzE35MFPqrw0Y7KMjX8UW/JIAU9lQpNBeN67Gq4/cmunz7Lpf+rULS7y5GJ3vuDenhOaj/fxNQyTlr2UE8uVDSlXZmjHQyZFJRrJSOi7CzyPheZHvkwZNZn4i8sZUSGj8dgBUvLPjTodIyYngl71vORgew529UN9fWCE=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1774439541; c=relaxed/simple;\n bh=dUuUpgw1/Y5L9zQO96wpnRUIab8DgRv1e/koykhOYcU=;\n h=DKIM-Signature:From:To:Subject:Date:Message-ID:MIME-Version;\n b=ph6bknp1VUdDZ1pkLCOwaqDVd+TeKPvjPYATAeoK9lzdLgzQnt6XBlul+adPh8UZr7qtR/7+pk3ch6cnX6bLMIj6Dl1LfOJ/D41Bgkdb7BmL4oU5Kr3Yqx6rRHZ1GLiXJI0ZZ60Ar7hr89+nZxV5MiDkowAnKa4rpZpzY9s1k/I=","ARC-Authentication-Results":"i=1; server2.sourceware.org","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1774439540;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:content-type:content-type:\n in-reply-to:in-reply-to:references:references;\n bh=8XWHCqzbRHe54WUnwrDYm8Op/2qWiEYtxyUNSGO0ZJ0=;\n b=Fu6/tirCF7Y0JyAUpfg2NZmrfQc8RGQ4PExofHuj6+FDQARtfWPvkJoPCI/98MXVv9vOf+\n KIFULxid6aaLyeyXtUU1vBQlk1YlOdjMdmY/eWlXDyeAm1MRiNImqThEWL/kW0fE2d9LJj\n OhFnCMyzTESbIqq5myLEvqUVLqrCSsk=","X-MC-Unique":"TQ2nWxPtMPGN8p2bv1a-VA-1","X-Mimecast-MFC-AGG-ID":"TQ2nWxPtMPGN8p2bv1a-VA_1774439538","From":"Florian Weimer ","To":"Yury Khrustalev ","Cc":"libc-alpha@sourceware.org, Adhemerval Zanella\n , Wilco Dijkstra ","Subject":"Re: [PATCH] support: add __address_diff function","In-Reply-To":"<20260325105900.828958-1-yury.khrustalev@arm.com> (Yury\n Khrustalev's message of \"Wed, 25 Mar 2026 10:59:00 +0000\")","References":"<20260325105900.828958-1-yury.khrustalev@arm.com>","Date":"Wed, 25 Mar 2026 12:52:13 +0100","Message-ID":"","User-Agent":"Gnus/5.13 (Gnus v5.13)","MIME-Version":"1.0","X-Scanned-By":"MIMEDefang 3.4.1 on 10.30.177.111","X-Mimecast-Spam-Score":"0","X-Mimecast-MFC-PROC-ID":"MIBUtItdFFJdoWqyagG3ZC5qnXtN_leNqeaJJlKAiuE_1774439538","X-Mimecast-Originator":"redhat.com","Content-Type":"text/plain","X-BeenThere":"libc-alpha@sourceware.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Libc-alpha mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org"}},{"id":3669051,"web_url":"http://patchwork.ozlabs.org/comment/3669051/","msgid":"","list_archive_url":null,"date":"2026-03-25T12:20:38","subject":"Re: [PATCH] support: add __address_diff function","submitter":{"id":88214,"url":"http://patchwork.ozlabs.org/api/people/88214/","name":"Yury Khrustalev","email":"yury.khrustalev@arm.com"},"content":"Hello Florian\n\nThanks for the feedback!\n\nOn Wed, Mar 25, 2026 at 12:52:13PM +0100, Florian Weimer wrote:\n> * Yury Khrustalev:\n> \n> > diff --git a/support/pointer-arith.h b/support/pointer-arith.h\n> > new file mode 100644\n> > index 0000000000..fc9cf593ac\n> > --- /dev/null\n> > +++ b/support/pointer-arith.h\n> > @@ -0,0 +1,31 @@\n> \n> > +#ifndef _POINTER_ARITH_H\n> > +#define _POINTER_ARITH_H 1\n> > +\n> > +#include \n> > +#include \n> > +\n> > +#ifdef __ARM_ARCH_ISA_A64\n> > +ptrdiff_t __address_diff (const void *lhs, const void *rhs);\n> > +#else\n> > +#define __address_diff PTR_DIFF\n> > +#endif /* __ARM_ARCH_ISA_A64 */\n> > +\n> > +#endif\n> \n> Given that it's in support/, it should probably be called\n> support_address_diff or something. We don't use __ mangling under\n> support/.\n\nOK\n\n> The #ifdef is not necessary, sysdeps overrides should work for support/\n> headers.\n\nI've tried this but it doesn't seem to be working. Ideally, I want to\nhave the support_pointer_arith.c file only under sysdeps/aarch64 because\nfor all other targets the PTR_DIFF macro should be used, but makefile in\nthe support folder should probably be modified for this?\n\nAny help here very much appreciated.\n\n> The comment should say that the difference is computed in\n> bytes, not elements.\n\nOK, though it is difference in addresses, so it's implied that it's in\nbytes? I will clarify in the comment anyway.\n\nThanks,\nYury","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","libc-alpha@sourceware.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","libc-alpha@sourceware.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256\n header.s=foss header.b=it6cfBx/;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key,\n unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256\n header.s=foss header.b=it6cfBx/","sourceware.org;\n dmarc=pass (p=none dis=none) header.from=arm.com","sourceware.org; spf=pass smtp.mailfrom=arm.com","server2.sourceware.org;\n arc=none smtp.remote-ip=217.140.110.172"],"Received":["from vm01.sourceware.org (vm01.sourceware.org\n [IPv6:2620:52:6:3111::32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fgmGZ5h76z1xy1\n\tfor ; Wed, 25 Mar 2026 23:21:10 +1100 (AEDT)","from vm01.sourceware.org (localhost [127.0.0.1])\n\tby sourceware.org (Postfix) with ESMTP id 762CF4BB58FE\n\tfor ; Wed, 25 Mar 2026 12:21:08 +0000 (GMT)","from foss.arm.com (foss.arm.com [217.140.110.172])\n by sourceware.org (Postfix) with ESMTP id D68C54BB58C1\n for ; Wed, 25 Mar 2026 12:20:46 +0000 (GMT)","from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14])\n by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 63B961CDD;\n Wed, 25 Mar 2026 05:20:40 -0700 (PDT)","from arm.com (unknown [10.57.60.97])\n by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A7CC63F915;\n Wed, 25 Mar 2026 05:20:45 -0700 (PDT)"],"DKIM-Filter":["OpenDKIM Filter v2.11.0 sourceware.org 762CF4BB58FE","OpenDKIM Filter v2.11.0 sourceware.org D68C54BB58C1"],"DMARC-Filter":"OpenDMARC Filter v1.4.2 sourceware.org D68C54BB58C1","ARC-Filter":"OpenARC Filter v1.0.0 sourceware.org D68C54BB58C1","ARC-Seal":"i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1774441247; cv=none;\n b=qfuDreKlXrEyjtrWaEmiDy2hH7R/q9JcrPw264uXBQ/CtjIsM4u8fUMgrlndBGOIZfRRKr815WzdP1mkHJWUfyCyvDZvc1kZNHLoXfL95W48qecsX8sbKCQawWaFMCQ3GLCIBbIcaZFL2KpuF/8xl3qDIifvjEONJszhgVobjKs=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1774441247; c=relaxed/simple;\n bh=hdV75fX9qB4QssTXmJMMsWg8mUJW/rz0li4V284YYgQ=;\n h=DKIM-Signature:Date:From:To:Subject:Message-ID:MIME-Version;\n b=Ik9WUcxXOBS9B1YlcAbWZh4Nsu9rVinMPlNRSfURc/b5Tc2d5TRxUiYYAQnw0uxLLMOtCSWBQbIYZJkJVd9PeBZx9tIP4QZg6h9YbEefBBR72pkGfXJZEoO7+gGEXBc6554fuEe5bA6QWL/NaVWbqcyX2KhDPXc6+OQbh2x/3xI=","ARC-Authentication-Results":"i=1; server2.sourceware.org","DKIM-Signature":"v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss;\n t=1774441246; bh=hdV75fX9qB4QssTXmJMMsWg8mUJW/rz0li4V284YYgQ=;\n h=Date:From:To:Cc:Subject:References:In-Reply-To:From;\n b=it6cfBx/pvXAcqEHLVr1RqfhpSYessKRmt68qCUxlB7cfRWhBHn90A5KAOPmTDG46\n 3PRJ7xjbslbPUGH5Ug2rBAn7Ce4glZl6iIlsiO79SbWpCRlnuobMA/vAi5hLAPRCRC\n 1IZT7/XnfuZxhvr6dT1FTxuy7Q94rbZDAN/gL5Gg=","Date":"Wed, 25 Mar 2026 12:20:38 +0000","From":"Yury Khrustalev ","To":"Florian Weimer ","Cc":"libc-alpha@sourceware.org,\n Adhemerval Zanella ,\n Wilco Dijkstra ","Subject":"Re: [PATCH] support: add __address_diff function","Message-ID":"","References":"<20260325105900.828958-1-yury.khrustalev@arm.com>\n ","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"","X-BeenThere":"libc-alpha@sourceware.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Libc-alpha mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org"}},{"id":3669117,"web_url":"http://patchwork.ozlabs.org/comment/3669117/","msgid":"","list_archive_url":null,"date":"2026-03-25T14:18:35","subject":"Re: [PATCH] support: add __address_diff function","submitter":{"id":14312,"url":"http://patchwork.ozlabs.org/api/people/14312/","name":"Florian Weimer","email":"fweimer@redhat.com"},"content":"* Yury Khrustalev:\n\n>> The #ifdef is not necessary, sysdeps overrides should work for support/\n>> headers.\n>\n> I've tried this but it doesn't seem to be working. Ideally, I want to\n> have the support_pointer_arith.c file only under sysdeps/aarch64 because\n> for all other targets the PTR_DIFF macro should be used, but makefile in\n> the support folder should probably be modified for this?\n\nI don't know what exactly you tried to do. I recall that it worked for\nme in the past, but I don't remember the details. We only use sysdeps\noverrides for compilation flags today AFAICS.\n\nThanks,\nFlorian","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","libc-alpha@sourceware.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","libc-alpha@sourceware.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=E4j3JZym;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=pass (1024-bit key,\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=E4j3JZym","sourceware.org; dmarc=pass (p=quarantine dis=none)\n header.from=redhat.com","sourceware.org; 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Ideally, I want to\n> > have the support_pointer_arith.c file only under sysdeps/aarch64 because\n> > for all other targets the PTR_DIFF macro should be used, but makefile in\n> > the support folder should probably be modified for this?\n> \n> I don't know what exactly you tried to do. I recall that it worked for\n> me in the past, but I don't remember the details. We only use sysdeps\n> overrides for compilation flags today AFAICS.\n\nI can't find any existing example of adding to 'libsupport-routines'\nanywhere under 'sysdeps'. I tried doing it, and corresponding object is\nnot included in the libsupport static library.","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","libc-alpha@sourceware.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","libc-alpha@sourceware.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256\n header.s=foss header.b=sbPLACnc;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key,\n unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256\n header.s=foss header.b=sbPLACnc","sourceware.org;\n dmarc=pass (p=none dis=none) header.from=arm.com","sourceware.org; spf=pass smtp.mailfrom=arm.com","server2.sourceware.org;\n arc=none smtp.remote-ip=217.140.110.172"],"Received":["from vm01.sourceware.org (vm01.sourceware.org\n [IPv6:2620:52:6:3111::32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fgshP4bDyz1y1K\n\tfor ; Thu, 26 Mar 2026 03:25:25 +1100 (AEDT)","from vm01.sourceware.org (localhost [127.0.0.1])\n\tby sourceware.org (Postfix) with ESMTP id 2730B4BB3BFB\n\tfor ; Wed, 25 Mar 2026 16:25:23 +0000 (GMT)","from foss.arm.com (foss.arm.com [217.140.110.172])\n by sourceware.org (Postfix) with ESMTP id 550804B9DB71\n for ; Wed, 25 Mar 2026 16:25:01 +0000 (GMT)","from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14])\n by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E11C91F02;\n Wed, 25 Mar 2026 09:24:54 -0700 (PDT)","from arm.com (unknown [10.57.59.171])\n by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0073D3F915;\n Wed, 25 Mar 2026 09:24:59 -0700 (PDT)"],"DKIM-Filter":["OpenDKIM Filter v2.11.0 sourceware.org 2730B4BB3BFB","OpenDKIM Filter v2.11.0 sourceware.org 550804B9DB71"],"DMARC-Filter":"OpenDMARC Filter v1.4.2 sourceware.org 550804B9DB71","ARC-Filter":"OpenARC Filter v1.0.0 sourceware.org 550804B9DB71","ARC-Seal":"i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1774455901; cv=none;\n b=ceZuCQl54NvpjGSXh9ZejzeaMaq9ElUshc3uH9HOYnk2Ho73lC7wPV61qS/pBBGpQkSRdrFgSMUcjWEw+bEP9vtyozFuLPPy/DSMaD/DIRYp7e7/nb0+wnZysIVfrIf4/PKNPRj79mBuZ2880oqjKMC0ER5cMS3KifYEHWmkbg0=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1774455901; c=relaxed/simple;\n bh=gAzZSXsjrIHfkY8PBTDT5ndxQLO6Mxg7gPvExO6YDO0=;\n h=DKIM-Signature:Date:From:To:Subject:Message-ID:MIME-Version;\n b=NDtiqot6K5jdmE96Iy78hxItLvEWtTjGh68wsf2ES/ZEQVyTL3Qyo1LNZ8eZWDe89e0yopbxDkvTTHtUsoj5WSosvcEeVIFMFm08OHOuRk6b8vrsKyrbIPn7W0vp8wZfqS//xcwkJ45NL1HAHj7ALkdRitp0WJ7/SIdLiBF3d6g=","ARC-Authentication-Results":"i=1; server2.sourceware.org","DKIM-Signature":"v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss;\n t=1774455900; bh=gAzZSXsjrIHfkY8PBTDT5ndxQLO6Mxg7gPvExO6YDO0=;\n h=Date:From:To:Cc:Subject:References:In-Reply-To:From;\n b=sbPLACncZYoyzVDvx8QE2jBu7wJ+1qsqn+FU36oApqcOWWArxmM9MIUV66HzJstfo\n g1obtisJoWNUVF65ZF9QPedkoDwTSf7e5ExRy0aMD8PkGtikSZInMgySX1nxddSlsA\n ksmz6INT4oCbLQFrOCVdmqKmFUH0Pb55sKrs4MS4=","Date":"Wed, 25 Mar 2026 16:24:53 +0000","From":"Yury Khrustalev ","To":"Florian Weimer ","Cc":"libc-alpha@sourceware.org,\n Adhemerval Zanella ,\n Wilco Dijkstra ","Subject":"Re: [PATCH] support: add __address_diff function","Message-ID":"","References":"<20260325105900.828958-1-yury.khrustalev@arm.com>\n \n \n ","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"","X-BeenThere":"libc-alpha@sourceware.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Libc-alpha mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org"}},{"id":3669196,"web_url":"http://patchwork.ozlabs.org/comment/3669196/","msgid":"","list_archive_url":null,"date":"2026-03-25T16:40:20","subject":"Re: [PATCH] support: add __address_diff function","submitter":{"id":14312,"url":"http://patchwork.ozlabs.org/api/people/14312/","name":"Florian Weimer","email":"fweimer@redhat.com"},"content":"* Yury Khrustalev:\n\n> On Wed, Mar 25, 2026 at 03:18:35PM +0100, Florian Weimer wrote:\n>> * Yury Khrustalev:\n>> \n>> >> The #ifdef is not necessary, sysdeps overrides should work for support/\n>> >> headers.\n>> >\n>> > I've tried this but it doesn't seem to be working. Ideally, I want to\n>> > have the support_pointer_arith.c file only under sysdeps/aarch64 because\n>> > for all other targets the PTR_DIFF macro should be used, but makefile in\n>> > the support folder should probably be modified for this?\n>> \n>> I don't know what exactly you tried to do. I recall that it worked for\n>> me in the past, but I don't remember the details. We only use sysdeps\n>> overrides for compilation flags today AFAICS.\n>\n> I can't find any existing example of adding to 'libsupport-routines'\n> anywhere under 'sysdeps'. I tried doing it, and corresponding object is\n> not included in the libsupport static library.\n\nAhh. Easiest way is to make it an out-of-line definition every, so the\n.c file already exists in support/.\n\nAlternatively, you could add it like this:\n\nifeq ($(subdir), support)\nlibsupport-sysdep_routines += \\\n support_pointer_arith \\\n # sysdep_routines\nendif\n\nin sysdeps/aarch64/Makefile. We use this for libm and libmvec, so I\nassume it actually works.\n\nThanks,\nFlorian","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","libc-alpha@sourceware.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","libc-alpha@sourceware.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=ehhEqpN1;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org\n (client-ip=38.145.34.32; helo=vm01.sourceware.org;\n envelope-from=libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=pass (1024-bit key,\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=ehhEqpN1","sourceware.org; dmarc=pass (p=quarantine dis=none)\n header.from=redhat.com","sourceware.org; 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I tried doing it, and corresponding object is\n> > not included in the libsupport static library.\n> \n> Ahh. Easiest way is to make it an out-of-line definition every, so the\n> .c file already exists in support/.\n> \n> Alternatively, you could add it like this:\n> \n> ifeq ($(subdir), support)\n> libsupport-sysdep_routines += \\\n> support_pointer_arith \\\n> # sysdep_routines\n> endif\n> \n> in sysdeps/aarch64/Makefile. We use this for libm and libmvec, so I\n> assume it actually works.\n> \n\nThank you, I've made it working (see v2 [1]). The problem was that I\nneeded to make this change in 'support/address-diff.h':\n\n- libsupport-static-only-routines := $(libsupport-routines)\n+ libsupport-static-only-routines = $(libsupport-routines) $(libsupport-sysdep_routines)\n\nSince libsupport is static-only library, it uses only $(libsupport-static-only-routines)\nand that hadn't include $(libsupport-sysdep_routines) before.\n\nThis change doesn't break anything else, so hopefully, v2 is OK in this\nregard.\n\nCheers,\nYury\n\n[1]: https://inbox.sourceware.org/libc-alpha/20260326135049.2254482-1-yury.khrustalev@arm.com/","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","libc-alpha@sourceware.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","libc-alpha@sourceware.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256\n header.s=selector1 header.b=ldcG5ZwU;\n\tdkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com\n header.a=rsa-sha256 header.s=selector1 header.b=ldcG5ZwU;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org\n (client-ip=2620:52:6:3111::32; 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