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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1723792953; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4ziMcKMgTIE3T4+13ZdPgIhZiIyVR9U9bdaD+wjkZoc=; b=Sx/GA54WNflgrzJhwL1pbZ8LrncY+j7G3cnpVLArWwbfEVuItpnIz3AjAXudDnRg7Kdmah z9Dd8ZNbXqp5LBxij0rTA3OkMBeeNKkftXjCX+D9Tlo1jp2X2KvD79MyqXJWYgOjA0Yd2p goTsEIJmq0ZmXWYMuJ1orc7dZn1+PVI= X-MC-Unique: z5dri-0aO6aPB32rXyabzg-1 From: Thomas Huth To: qemu-devel@nongnu.org, Richard Henderson Subject: [PULL 2/5] meson.build: Check for the availability of __attribute__((gcc_struct)) on MSYS2 Date: Fri, 16 Aug 2024 09:22:15 +0200 Message-ID: <20240816072218.27125-3-thuth@redhat.com> In-Reply-To: <20240816072218.27125-1-thuth@redhat.com> References: <20240816072218.27125-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.131, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1723793091470116600 Content-Type: text/plain; charset="utf-8" Since quite a while MSYS2 now supports Clang as a compiler, too. Unfortunately, this compiler is lacking the __attribute__((gcc_struct)) that we need for compiling on Windows. But since the compiler is available now, some people started to use it to compile QEMU on MSYS2, apparently ignoring the compiler warnings (see for example the ticket at https://gitlab.com/qemu-project/qemu/-/issues/2476 ). These builds are likely broken in a couple of spots, so let's make sure that we rather bail out early in the configuration phase instead of allowing the build to succeed with warnings. Message-ID: <20240815122719.727639-1-thuth@redhat.com> Tested-by: Stefan Weil Signed-off-by: Thomas Huth --- meson.build | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/meson.build b/meson.build index 81ecd4bae7..fbda17c987 100644 --- a/meson.build +++ b/meson.build @@ -315,6 +315,11 @@ elif host_os =3D=3D 'sunos' qemu_common_flags +=3D '-D__EXTENSIONS__' elif host_os =3D=3D 'haiku' qemu_common_flags +=3D ['-DB_USE_POSITIVE_POSIX_ERRORS', '-D_BSD_SOURCE'= , '-fPIC'] +elif host_os =3D=3D 'windows' + if not compiler.compiles('struct x { int y; } __attribute__((gcc_struct)= );', + args: '-Werror') + error('Your compiler does not support __attribute__((gcc_struct)) - pl= ease use GCC instead of Clang') + endif endif =20 # __sync_fetch_and_and requires at least -march=3Di486. Many toolchains --=20 2.46.0