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[50.253.99.174]) by smtp.gmail.com with ESMTPSA id t9-20020a056e02060900b0034b58dd5694sm2805491ils.15.2023.08.28.16.41.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Aug 2023 16:41:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20221208.gappssmtp.com; s=20221208; t=1693266103; x=1693870903; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=nM7Uf06w0wMTd6N1re2AAxx7TTOheoegcX2ZAbmHQ9U=; b=cxqRz7OTUKEN9CO5n0/7oJAnFZnB+zzx+AZeD3Fjs6pufaFKwsN1rKS+YhxFXnk0nH qv3pw8lSd+o7262cnKQh+fAQaRh+eOFS0GRtesS8dTmlFzNh2n3mvqHlM4KKm45lhXM2 YlZlnt3ihBqwjzm/gqGtBFfjfCWDzA3LIZezr00Pxny9y5Ldx22Oqhei/7kfjdOEcCGl GhR8mVTYj9SsSNW0nHoiMSK0Wu5I2J5P3V0OrG/Wl3AFkTlm2A4y1IlP4KSl+ZelBypV 9owbdGOvwwKqicuH5cye2XsLgBmSC10ZclH9oi3anj7r9lLgDWGt9/i/+rEXQQXfBAOQ AB9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693266103; x=1693870903; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=nM7Uf06w0wMTd6N1re2AAxx7TTOheoegcX2ZAbmHQ9U=; b=e1OC+im5exDXqKDNoLyF9MpMD6DW+vRE3pnJ3b91kLVS3RQDnaqunjF6cuPSQc+fkb /EBxNRmyLVWMF7n7yjT89JghH0sRiv1C5sI1eKRs0pGPJ4pPr9I6u4F7yPvc+5DTXY8w skqZb4EEl36llMDQFE/TadDbs+bequPJWlLgQnsJHoStLth2ORt5svkTXbL/dXCV4Mb6 mG+jV4XuPbT3jqHk7zQ4A/aLVjeOoyqEyzcxJlMNKckaWR8bC3cLE1DiihUouvSkq/pX YCK6OFTouKxqtYKsF/BMjzcsY9MrqUEfwGhFQKL6VLFNuDoGele/2eG8vjFlkBHz2BtG 7/iA== X-Gm-Message-State: AOJu0Yxe3ZYI8+oeb3+KohvIk2h22jckv42pO32feKJyn5fOBIJrd6Rh fLi1la0FPx0oXD2y9P8k0WmPI2Ak3OLpWnp05Gg= X-Google-Smtp-Source: AGHT+IGaSMX4ldnm7pyU+qmMdi1DyJwNLjPcXxUBvOq8xNvthRoS+ZKdUBd77ojjowxinwwJK8PJIg== X-Received: by 2002:a05:6e02:1d96:b0:348:dba4:6418 with SMTP id h22-20020a056e021d9600b00348dba46418mr20913100ila.6.1693266103606; Mon, 28 Aug 2023 16:41:43 -0700 (PDT) From: Warner Losh To: qemu-devel@nongnu.org Cc: Reinoud Zandijk , Warner Losh , Ryo ONODERA , Kyle Evans , Kyle Evans , Karim Taha , Richard Henderson Subject: [PULL 05/36] bsd-user: Disable clang warnings Date: Mon, 28 Aug 2023 17:37:50 -0600 Message-ID: <20230828233821.43074-6-imp@bsdimp.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230828233821.43074-1-imp@bsdimp.com> References: <20230828233821.43074-1-imp@bsdimp.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: none client-ip=2607:f8b0:4864:20::134; envelope-from=imp@bsdimp.com; helo=mail-il1-x134.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 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 @bsdimp-com.20221208.gappssmtp.com) X-ZM-MESSAGEID: 1693266254891100010 Content-Type: text/plain; charset="utf-8" From: Kyle Evans Implement PRAGMA_DISABLE_PACKED_WARNING and PRAGMA_REENABLE_PACKED_WARNING macros in include/qemu/compiler.h. Signed-off-by: Kyle Evans Signed-off-by: Karim Taha Reviewed-by: Richard Henderson Signed-off-by: Warner Losh --- include/qemu/compiler.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/include/qemu/compiler.h b/include/qemu/compiler.h index a309f90c768..b0374425180 100644 --- a/include/qemu/compiler.h +++ b/include/qemu/compiler.h @@ -22,6 +22,36 @@ #define QEMU_EXTERN_C extern #endif =20 +/* + * Tricky points: + * - Use __builtin_choose_expr to avoid type promotion from ?:, + * - Invalid sizes result in a compile time error stemming from + * the fact that abort has no parameters. + * - It's easier to use the endian-specific unaligned load/store + * functions than host-endian unaligned load/store plus tswapN. + * - The pragmas are necessary only to silence a clang false-positive + * warning: see https://bugs.llvm.org/show_bug.cgi?id=3D39113 . + * - We have to disable -Wpragmas warnings to avoid a complaint about + * an unknown warning type from older compilers that don't know about + * -Waddress-of-packed-member. + * - gcc has bugs in its _Pragma() support in some versions, eg + * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D83256 -- so we only + * include the warning-suppression pragmas for clang + */ +#ifdef __clang__ +#define PRAGMA_DISABLE_PACKED_WARNING \ + _Pragma("GCC diagnostic push"); \ + _Pragma("GCC diagnostic ignored \"-Wpragmas\""); \ + _Pragma("GCC diagnostic ignored \"-Waddress-of-packed-member\"") + +#define PRAGMA_REENABLE_PACKED_WARNING \ + _Pragma("GCC diagnostic pop") + +#else +#define PRAGMA_DISABLE_PACKED_WARNING +#define PRAGMA_REENABLE_PACKED_WARNING +#endif + #if defined(_WIN32) && (defined(__x86_64__) || defined(__i386__)) # define QEMU_PACKED __attribute__((gcc_struct, packed)) #else --=20 2.41.0