From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Thu, 23 Feb 2017 09:17:59 +0100 Subject: [Buildroot] [autobuild.buildroot.net] Build results for 2017-02-20 In-Reply-To: <20170222213900.4ba95a1f@gmx.net> References: <20170221072902.80C59207F9@mail.free-electrons.com> <20170222213900.4ba95a1f@gmx.net> Message-ID: <20170223091759.3b1cd434@free-electrons.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hello, On Wed, 22 Feb 2017 21:39:00 +0100, Peter Seiderer wrote: > On Tue, 21 Feb 2017 08:29:02 +0100 (CET), Thomas Petazzoni wrote: > > > sparc | libv4l-1.12.2 | NOK | http://autobuild.buildroot.net/results/3f13042565df20087e007949f653942c0462e334 > > > From build-end.log: > > CXXLD qv4l2 > > qv4l2-qv4l2.o: In function `QtPrivate::RefCount::deref()': > qv4l2.cpp:(.text._ZN9QtPrivate8RefCount5derefEv[_ZN9QtPrivate8RefCount5derefEv]+0x24): undefined reference to `__sync_fetch_and_add_4' > qv4l2-qv4l2.o: In function `QString::QString(QString const&)': > qv4l2.cpp:(.text._ZN7QStringC2ERKS_[_ZN7QStringC5ERKS_]+0x54): undefined reference to `__sync_fetch_and_add_4' > qv4l2-vbi-tab.o: In function `QtPrivate::RefCount::ref()': > vbi-tab.cpp:(.text._ZN9QtPrivate8RefCount3refEv[_ZN9QtPrivate8RefCount3refEv]+0x24): undefined reference to `__sync_fetch_and_add_4' This normally indicates that a dependency on BR2_TOOLCHAIN_HAS_SYNC_4 is missing. > This can be fixed by adding the following two lines to package/libv4l/libv4l.mk: > > LIBV4L_CONF_ENV += CXXFLAGS="$(TARGET_CXXFLAGS) -std=gnu++0x" > LIBV4L_CONF_ENV += LDFLAGS="$(TARGET_LDFLAGS) -latomic" Hum, so using gnu++0x forces to use __atomic built-ins instead of __sync built-ins ? Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com