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[83.57.169.13]) by smtp.gmail.com with ESMTPSA id 9sm3199432wra.80.2021.01.29.10.53.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 29 Jan 2021 10:53:01 -0800 (PST) Subject: Re: [PATCH v4 09/12] target/arm: Make m_helper.c optional via CONFIG_ARM_V7M To: Richard Henderson , qemu-devel@nongnu.org, Paolo Bonzini , =?UTF-8?Q?Marc-Andr=c3=a9_Lureau?= Cc: Thomas Huth , Fam Zheng , Peter Maydell , kvm@vger.kernel.org, =?UTF-8?Q?Alex_Benn=c3=a9e?= , qemu-arm@nongnu.org, Richard Henderson References: <20200929224355.1224017-1-philmd@redhat.com> <20200929224355.1224017-10-philmd@redhat.com> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Message-ID: Date: Fri, 29 Jan 2021 19:53:00 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 10/3/20 11:48 AM, Richard Henderson wrote: > On 9/29/20 5:43 PM, Philippe Mathieu-Daudé wrote: >> +arm_ss.add(when: 'CONFIG_ARM_V7M', if_true: files('m_helper.c'), if_false: files('m_helper-stub.c')) >> + >> arm_ss.add(zlib) >> >> arm_ss.add(when: 'CONFIG_TCG', if_true: files('arm-semi.c')) >> +arm_ss.add(when: 'CONFIG_TCG', if_false: files('m_helper-stub.c')) > > I'm a bit surprised about adding the file twice. > Since ARM_V7M depends on TCG, isn't the second line redundant? This does: if TCG if CONFIG_ARM_V7M files('m_helper.c') else #!V7M files('m_helper-stub.c')) endif else #!TCG files('m_helper-stub.c')) endif So: if !TCG or !V7M files('m_helper-stub.c')) else files('m_helper.c') endif There might be a better way to express that in Meson... I only understood how to do AND with arrays, but not OR. Paolo/Marc-André, is it possible? Thanks, Phil.