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Wed, 11 Mar 2020 22:51:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1583967101; 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=9M+fk402aDyMTIond6ySEoZWgIvegTFPDDHFMIDsNpk=; b=drPpIGyz1sA/cXcBisq8XG4dkC+Cx7wTp9buOweueXJqn9nhO+YKC3MHV4Rglg7urUoNzP 7z9lztTLuSEeranSqfRDpmVWWHf98wnJ/92BvqJr1fmDDHCf6PAcQpR0i31UTKUQZ/9+OZ egeGJj8iout7jj4Qe67rF6GAcfu1je4= X-MC-Unique: LQWFiLgyMqSoywHrxe0kPw-1 From: Eduardo Habkost To: qemu-devel@nongnu.org Subject: [PATCH 1/2] Use -isystem for linux-headers dir Date: Wed, 11 Mar 2020 18:51:29 -0400 Message-Id: <20200311225130.1599619-2-ehabkost@redhat.com> In-Reply-To: <20200311225130.1599619-1-ehabkost@redhat.com> References: <20200311225130.1599619-1-ehabkost@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 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: 207.211.31.120 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 --- 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..04a2a7f2dd 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 $QEMU= _INCLUDES" + QEMU_INCLUDES=3D"-isystem \$(SRC_PATH)/linux-headers -I$PWD/linux-header= s $QEMU_INCLUDES" supported_os=3D"yes" libudev=3D"yes" ;; --=20 2.24.1