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Wed, 11 Mar 2020 23:23:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1583969033; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PZN4m+/PqtpyDtwq5UdVct/FSMkksce+UIeifqMZuiA=; b=TaYgiAB09kytkKAEvCgzvwEqeqrqMXjp5KDlB4gFU5uQYobkfcbSfPKa/y5wiGhkfC8av1 J8doauWGv6xcn/nIagU4BMyqDfWYMwzPPrpDZIhu+hl4+t2lADOIOdb7JUBtGPKwLfNmUt ZH7Ih3Q1gehqmrxobBOYMcePHx4eA40= X-MC-Unique: Es2TVU5FPU2VwlhRXc3kkg-1 From: Eduardo Habkost To: qemu-devel@nongnu.org Subject: [PATCH v2 1/2] Use -isystem for linux-headers dir Date: Wed, 11 Mar 2020 19:23:41 -0400 Message-Id: <20200311232342.1614944-2-ehabkost@redhat.com> In-Reply-To: <20200311232342.1614944-1-ehabkost@redhat.com> References: <20200311232342.1614944-1-ehabkost@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 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: peter.maydell@linaro.org, jingqi.liu@intel.com, Paolo Bonzini , jtomko@redhat.com, mst@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" glibc and Linux-provided headers are known to generate macro redefinition warnings when used together. For example: and duplicate some macro definitions. We normally never see those warnings because GCC suppresses warnings generated by system headers. We carry our own copy of Linux header files, though, and this makes those warnings not be suppressed when glibc headers are included before Linux headers (e.g. if is included before ). Use -isystem instead of -I for linux-headers. This makes the compiler treat our linux-headers directory the same way it treats system-provided Linux headers, and suppress warnings generated by them. Signed-off-by: Eduardo Habkost Reviewed-by: Michael S. Tsirkin --- Changes v1 -> v2: * Use -isystem for $PWD/linux-headers too Reported-by: "Michael S. Tsirkin" --- Makefile.target | 2 +- configure | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/Makefile.target b/Makefile.target index 2d43dc586a..934a9f7431 100644 --- a/Makefile.target +++ b/Makefile.target @@ -12,7 +12,7 @@ endif =20 $(call set-vpath, $(SRC_PATH):$(BUILD_DIR)) ifdef CONFIG_LINUX -QEMU_CFLAGS +=3D -I../linux-headers +QEMU_CFLAGS +=3D -isystem ../linux-headers endif QEMU_CFLAGS +=3D -iquote .. -iquote $(SRC_PATH)/target/$(TARGET_BASE_ARCH)= -DNEED_CPU_H =20 diff --git a/configure b/configure index cbf864bff1..bf5bf70600 100755 --- a/configure +++ b/configure @@ -899,7 +899,7 @@ Linux) linux=3D"yes" linux_user=3D"yes" kvm=3D"yes" - QEMU_INCLUDES=3D"-I\$(SRC_PATH)/linux-headers -I$PWD/linux-headers $QEMU= _INCLUDES" + QEMU_INCLUDES=3D"-isystem \$(SRC_PATH)/linux-headers -isystem $PWD/linux= -headers $QEMU_INCLUDES" supported_os=3D"yes" libudev=3D"yes" ;; --=20 2.24.1