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([2001:b07:6468:f312:d153:8d0f:94cf:5114]) by smtp.gmail.com with ESMTPSA id k4sm21545961wrx.51.2020.09.21.07.08.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 21 Sep 2020 07:08:26 -0700 (PDT) Subject: Re: Issue 25514 in oss-fuzz: qemu: Coverage build failure To: Alexander Bulekov References: <0=0a88cf92d34dc9db91727cc9bd0dc58b=d9ca53ad17e3d19752f355e6c3ba1ecc=oss-fuzz@monorail-prod.appspotmail.com> <0000000000003aa8d805afd00f24@google.com> <995b1aa7-8efc-57d2-a85e-5520fab0755b@redhat.com> <20200921133840.sby75zn7unds2q3a@mozz.bu.edu> From: Paolo Bonzini Message-ID: <437d5c39-0a27-b261-102b-0da64734966a@redhat.com> Date: Mon, 21 Sep 2020 16:08:26 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <20200921133840.sby75zn7unds2q3a@mozz.bu.edu> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US Received-SPF: pass client-ip=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/21 01:43:11 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.455, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 21/09/20 15:38, Alexander Bulekov wrote: > Hi Paolo, > These are the builds with clang coverage enabled. > The normal fuzzing builds are succeeding now (log from this morning: > https://oss-fuzz-build-logs.storage.googleapis.com/log-a426424c-cae4-407a-ae7b-205a9ae59286.txt > ) > > I already send a patch that seems to fix the coverage build failure, but > I can't explain why it does the trick. > Message-Id: <20200909220516.614222-1-alxndr@bu.edu> > https://lists.gnu.org/archive/html/qemu-devel/2020-09/msg03639.html The reason for the bug is the -Wl,-lm in QEMU_LDFLAGS. Putting the tricky flags first actually makes sense, so I'll queue it. Paolo