All,
During Connect the suggestion was made that each working group should have
its own IRC Channel for discussions and topics relating to the group in
particular (as opposed to #linaro which is 'generic' Linaro conversations).
Therefore I have just set up #linaro-tcwg on Freenode for the Toolchain
Working Group.
This channel is public and open to anyone who wants to talk with the TCWG
group about anything toolchain related.
Thanks,
Matt
--
Matthew Gretton-Dann
Toolchain Working Group, Linaro
The Linaro Toolchain and Platform Working Groups are pleased to
announce the 2013.07 release of the Linaro Toolchain Binaries, a
pre-built version of Linaro GCC and Linaro GDB that runs on generic
Linux or Windows and targets the glibc Linaro Evaluation Build.
Uses include:
* Cross compiling ARM applications from your laptop
* Remote debugging
* Build the Linux kernel for your board
What's included:
* Linaro GCC 4.8 2013.07-1
* Linaro Newlib 2.0 2013.06
* Linaro Binutils 2.23 2013.06
* Linaro Eglibc 2.17-2013.07-2
* Linaro GDB 7.6 2013.05
* A statically linked gdbserver
* A system root
* Manuals under share/doc/
The system root contains the basic header files and libraries to link
your programs against.
Interesting changes include:
* The sysroot is based on Linaro versions of Eglibc. About details of
Linaro Eglibc, please refer
https://releases.linaro.org/13.07/components/toolchain/eglibc-linaro.
The Linux version is supported on Ubuntu 10.04.3 and 12.04, Debian
6.0.2, Fedora 16, openSUSE 12.1, Red Hat Enterprise Linux Workstation
5.7 and later, and should run on any Linux Standard Base 3.0
compatible distribution. Please see the README about running on x86_64
hosts.
The Windows version is supported on Windows XP Pro SP3, Windows Vista
Business SP2, and Windows 7 Pro SP1.
The binaries and build scripts are available from:
https://launchpad.net/linaro-toolchain-binaries/trunk/2013.07
Need help? Ask a question on https://ask.linaro.org/
Already on Launchpad? Submit a bug at
https://bugs.launchpad.net/linaro-toolchain-binaries
On IRC? See us on #linaro on Freenode.
Other ways that you can contact us or get involved are listed at
https://wiki.linaro.org/GettingInvolved.
Know issues:
* Some version information in README are incorrect.
* gdb can not backtrace into libc.
Notes:
* To use all of the features of Linaro eglibc, the sysroot in 32-bit
toolchain release is updated to Linaro eglibc, which is 2.17. If you
get runtime errors about libc version, please get the sysroot from the
release tarball
(gcc-linaro-arm-linux-gnueabihf-4.8-2013.07-1_linux/arm-linux-gnueabihf/libc/)
or download from launchpad
https://launchpad.net/linaro-toolchain-binaries/support/01/+download/linaro…
If you do not want to use Linaro sysroot, you'd add option to gcc to
find your sysroot:
--sysroot=<directory>
* To run 32-bit application built from arm-linux-gnueabihf toolchain
in aarch64 system, you'd copy sysroot and runtime from release package
to your root of aarch64 system. i,e.
scp -r gcc-linaro-arm-linux-gnueabihf-4.8-2013.07-1_linux/arm-linux-gnueabihf/libc/*
AARCH64-SYSTEM:/
scp -r gcc-linaro-arm-linux-gnueabihf-4.8-2013.07-1_runtime/* AARCH64-SYSTEM:/
== Week of March 24th ==
- STREAM regression (TCWG-388, 5/10)
-- Finished prototype patch. The patch adds modeling of ARM L2 auto-prefetcher hardware to GCC scheduler (the model is very simple as auto-prefetcher is very lightly documented). Half of the patch cleans up and improves GCC scheduler, and the other half implements the auto-prefetcher model.
-- While looking into ARM scheduling support noticed that ARM doesn't use multipass lookahead scheduling, which surprised me. Enabled it (multipass scheduling) in my patches.
- Looked into lll_timed_wait Glibc/uClibc bug upstream (1/10)
-- https://sourceware.org/ml/libc-alpha/2014-03/msg00905.html
- Various discussions and reviews (4/10)
== Week of March 30th ==
- STREAM regression (TCWG-388)
-- Benchmark patches on SPEC2k and find/confirm best values for tuning parameters:
--- dfa_lookahead: should normally be issue_rate-1.
--- L2 auto-prefetcher queue depth: new tuning knob.
-- Investigate any performance regressions from the patches.
- lll_timed_wait Glibc/uClibc bug
-- Make sure it is fixed upstream. Possibly backport to Linaro branches.
--
Maxim Kuvyrkov
www.linaro.org
== Issues ==
* none
== Progress ==
* Launchpad bugs:
o TCWG-422 : ICE in assign_by_spills building linux btrfs module (1/10)
- created blueprint for :
https://bugs.launchpad.net/gcc-linaro/+bug/1296676
- Reported upstream as :
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60650
- Reduced testcase
- Fix committed by Vladimir as rev208876
- still ICE when configured for arm-none-linux-gnueabihf
o Backported "Internal compiler error in push_reload during
bootstrap stage 2" to GCC 4.7 (1/10)
- https://bugs.launchpad.net/gcc-linaro/+bug/1129013
- some testsuite regressions observed. will investigate.
* Backports review: (5/10)
o reviewed backport for pr60264 and rev202663
o cortex-a53 support backport:
- Analysed testsuite regression
- 22K Loc patch under review
* LRA on AArch32:
o TCWG-345 : Analyse performance of LRA for ARM. (1/10)
- looked at the perf tool results
* Misc:
o Various meetings (1/10).
o Various support to team members (1/10)
o Cbuildv1 baby-sitting (Calxedas nodes have to be restarted after
each upgrades !)
== Next ==
- continue cortex-a53 review
- continue on backports.
- continue on TCWG-345.
== Progress ==
* Short Week
-- Monday Day Off: Pakistan Day 23rd March public holiday roll over. [2/10]
-- Short leave on Thursday [1/10]
* Work on gdb testing utility [TCWG-96] [7/10]
-- Writing a new gdb testing utility script that automates gdb
testing in various configurations and compares testsuite results.
-- Support for all kind of native, native-gdbserver and
remote-gdbserver gdb configurations has been added.
-- Interactive and configuration file based user input mode has been added.
-- Testing configurations host alive, ssh possible, board file found
and ability to build sources using user defined configure flags has
been added.
== Plan ==
* Work on gdb testing utility [TCWG-96].
-- Add support to run native and native-gdbserver test via ssh on
remote machines like arm-linux.
-- Bug fix and test gdb testing utility by running it various configurations.
-- Update wiki page with testing utility and how to use it.
== This week ==
a53 support
- Fixed regression found in arm testing and resubmitted build and
merge requests
- arrch64 testing passed with no regressions. Testing with a53
support enabled still required
Merged 202663 (vectorizer bug) into 4.7 and 4.8 branches. Submitted
merge and build requests
== Next week ==
- Test aarch64 with a53 support enabled on qemu64
- Work on bug 60657 - [4.9 Regresssion] ICE: error: insn does not
satisfy its constraints
== Future ==
== Issues ==
* None
== Progress ==
* Create prebuilt sysroot based on Linaro eglibc 2014.04 release
(https://launchpad.net/linaro-toolchain-binaries/support/01/+download/linaro…)
(1/10).
* Enable shrink-wrap for apcs. Patch was out for community review. (1/10)
* Reinvestigate shrink-wrap enhancement (4/10, TCWG-133)
- There was improvement in ira to split_live_ranges_for_shrink_wrap
(http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10474). But it still can
not handle the case in 453.povray.
- Investigate to do a simple copy-forward when prepare_shrink_wrap.
* Investigate lp:1296942 (pr60663). Patch is sent out for community
review. (4/10)
* Backporting the fix for pr60264 to Linaro 4..8.
== Plans ==
* Continue on shrink-wrap enhancement.
== Planned leaves ==
* April 7: Qingming holiday.
== Progress ==
- TCWG-413 Spec2006 (7/10)
- Investigated compiler error for 481.wrf with FSF 4.8.2. Issue is
due to aarch64_cm<cmp><mode> pattern (fcmle and fcmlt supports only #0
as third val). This is already fixed in trunk and Linaro 4.8.
- Ran profiling to analyse 4.9 regressions. Started looking into
P7Vitterbui which is one of the functions that performs badly.
- TCWG-291 CRC (3/10)
Came up with a patch for improving vrp for test-case. Some c++ test
cases are failing in regression testing with this patch. Looking into it.
- TCWG-394 / PR60034
Patch committed and card closed.
http://gcc.gnu.org/viewcvs?rev=208949&root=gcc&view=rev
== Plan ==
Continue with Spec2006 and crc
== Progress ==
* Android (no card, 10 minutes. ;)
- Implemented __builtin___clear_cache in Clang
* Kernel (TCWG-417) 6/10
- VLAIS in crypto (last place in kernel)
- __builtin__stack_pointer (new builtin)
- Discussion in GCC list, named registers might be a better option
- Discussion in LLVM list about implementing named registers
- Implementing named register variables...
- Planning on LAVA testing LLVM kernels with LLVMLinux
- __aeabi_memset/cpy/move (both Android and Kernel) will have to be fixed
* Libraries (TCWG-125) 2/10
- libc++abi's unwind routines assume (ARM == SjLj)
- libc++ doesn't work without them
- We'll need to teach it about EHABI (later)
* Background 2/10
- Installed ArchLinux on my laptop, took some time to setup
- Re-org of LLVM Jira Cards (TCWG-417)
- Reviewing some GSoC proposals
== Plan ==
* implement named register variables in LLVM, then Clang
* Continue helping LLVMLinux and Milosz to test the LLVM kernel
* Time allowing, check CBuild2 for an LLVM build
* Two long weeks of holidays...
== Progress ==
* Bugfix aarch64 setcontext patch (2/10, TCWG-410)
* malloc requirements wiki page (2/10, TCWG-414)
* Lots of creating and updating and updating JIRA cards (1/10)
* glibc patch review (1/10)
* Assorted small patches - ld relasz, gnulib obstack, glibc strtod
benchmark (2/10)
* Investigate a couple of issues raised by member services and on lists (2/10)
== Issues ==
* None
== Plan ==
* Resurrect glibc malloc benchtest
* More glibc benchmark infrastructure work
* Check status of glibc ARM port build warnings
--
Will Newton
Toolchain Working Group, Linaro
