From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTP id 648973858402 for ; Mon, 13 Sep 2021 19:22:37 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 648973858402 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-24-V3jY-4gmNI2vbPsOVR1JHg-1; Mon, 13 Sep 2021 15:22:35 -0400 X-MC-Unique: V3jY-4gmNI2vbPsOVR1JHg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A37001808304; Mon, 13 Sep 2021 19:22:34 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.195.4]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 473945C1D0; Mon, 13 Sep 2021 19:22:33 +0000 (UTC) From: Florian Weimer To: "HON LUU" Cc: Segher Boessenkool , "gcc-help@gcc.gnu.org" Subject: Re: gcc question References: <20210908162025.GO1583@gate.crashing.org> <20210910183609.GA1583@gate.crashing.org> Date: Mon, 13 Sep 2021 21:22:31 +0200 In-Reply-To: (HON LUU's message of "Sat, 11 Sep 2021 21:08:06 +0000") Message-ID: <87wnnk7020.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gcc-help@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-help mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 13 Sep 2021 19:22:38 -0000 * HON LUU: > + Another interesting note is: > + if I remove -fPIC from user space gcc command, then the code compile successfully. However -fPIC is the must for my project. arch_static_branch is useable in the kernel (or kernel modules), but the kernel cannot be compiled with -fPIC. So you have to stop using one thing or the other. This isn't really a GCC question, is more about the kernel build system. Thanks, Florian