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Mon, 12 Jul 2021 09:10:19 -0700 (PDT) Received: from [192.168.1.11] ([71.212.149.176]) by smtp.gmail.com with ESMTPSA id v21sm21142001pju.47.2021.07.12.09.10.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 12 Jul 2021 09:10:19 -0700 (PDT) Subject: Re: clang build error on i686 To: Peter Maydell References: From: Richard Henderson Message-ID: Date: Mon, 12 Jul 2021 09:10:17 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::434; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x434.google.com 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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-1.479, RCVD_IN_DNSWL_NONE=-0.0001, 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: Paolo Bonzini , qemu-devel , Cole Robinson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 7/11/21 10:50 AM, Peter Maydell wrote: >>>> Lots of errors like: >>>> >>>> /usr/bin/ld: libqemu-aarch64-softmmu.fa.p/accel_tcg_cputlb.c.o: in >>>> function `helper_atomic_cmpxchgq_le_mmu': >>>> /builddir/build/BUILD/qemu-6.0.0/accel/tcg/atomic_template.h:86: >>>> undefined reference to `__atomic_compare_exchange_8' >>>> /usr/bin/ld: libqemu-aarch64-softmmu.fa.p/accel_tcg_cputlb.c.o: in >>>> function `helper_atomic_xchgq_le_mmu': >>>> /builddir/build/BUILD/qemu-6.0.0/accel/tcg/atomic_template.h:134: >>>> undefined reference to `__atomic_exchange_8' ... > The first part of the problem isn't just a warning, though -- it's clang > actually emitting calls to libatomic. I wasn't able to reproduce this part, only the compile-time warning. r~