From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Sat, 20 Aug 2016 11:48:27 +0200 Subject: [Buildroot] [PATCHv4] bfin: fix issues with internal toolchain, re-enable C++ support In-Reply-To: <1471638312-4799-1-git-send-email-thomas.petazzoni@free-electrons.com> References: <1471638312-4799-1-git-send-email-thomas.petazzoni@free-electrons.com> Message-ID: <20160820114827.6d286be0@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 Fri, 19 Aug 2016 22:25:12 +0200, Thomas Petazzoni wrote: > From: Waldemar Brodkorb > > The three patches allow to compile applications using TLS emulation from > libgcc or C++ applications. > > The patches 892-libgcc-mkmap-symver-support-skip_underscore.patch and > 893-libgcc-config-bfin-use-the-generic-linker-version-in.patch fixes how > libgcc is generated, by making the necessary libgcc symbols declared > "GLOBAL", and therefore visible outside of libgcc. This fixes a large > number of undefined reference issues (for either C++ applications or > applications using TLS emulation). This was reported as gcc PR74748. > > The patch 894-libgcc-fix-DWARF-compilation-with-FDPIC-targets.patch > allows to build DWARF in FDPIC mode. This patch replaces the older > 892-disable-dwarf-bfin.patch, as instead of disabling DWARF support, it > fixes it. This was reported as gcc PR68468. > > In order to get C++ working without unresolved symbols, we also need to > disable symbol versioning (--disable-symvers). This is a remaining issue > in gcc which will be investigated at a later point. > > Since this commit fixes C++ support in Blackfin, it re-enables the > selection of C++ support for this architecture. > > Fixes: > (alsa-lib emutls) > http://autobuild.buildroot.net/results/8544ce58d75820666579db93a25ca5656a8efa8e/ > (cairo emutls) > http://autobuild.buildroot.net/results/88b02a5dd5408318941ccbfcea0a9cbaa331500a/ > (audiofile c++) > http://autobuild.buildroot.net/results/394e530c5dcd9ccb590eb151aeaadb37d11e0e39/ > (assimp c++) > http://autobuild.buildroot.net/results/01f4be126c2d786a5ad7f220c2cf60539888a480/ > (bellagio c++) > http://autobuild.buildroot.net/results/ada/ada44228bf13ec05382275bd6571396f5ba2b1f7/ > > Signed-off-by: Waldemar Brodkorb > Signed-off-by: Thomas Petazzoni Applied to master, thanks. Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com