- linaro-toolchain - lists.linaro.org

by Ira Rosen

Hi, - support of multiple uses of original pattern statements (needed for over-promotion work) - committed upstream - support of widen-mult of unsigned types and constants - merged to gcc-linaro-4.6 - vectorizer peeling heuristic improvement - proposed to merge to gcc-linaro-4.6 Ira

14 years, 10 months

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Fwd: [Bug gas/12931] ARM: gas fails to set the proper alignment on code sections, causing broken output

by Dave Martin

See the following commit in binutils trunk. If this is causing problems in other places, it could be worth considering for backport into the linaro tools. Cheers ---Dave http://sourceware.org/bugzilla/show_bug.cgi?id=12931 --- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2011-06-29 16:29:43 UTC --- CVSROOT: /cvs/src Module name: src Changes by: nickc(a)sourceware.org 2011-06-29 16:29:38 Modified files: gas : ChangeLog gas/config : tc-arm.c Log message: PR gas/12931 * config/tc-arm.c (mapping_state): When changing to ARM or THUMB state set the minimum required alignment of the section. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/src/gas/ChangeLog.diff?cvsroot=src… http://sourceware.org/cgi-bin/cvsweb.cgi/src/gas/config/tc-arm.c.diff?cvsro…

14 years, 10 months

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iDCT implementation in GCC NEON intrinsics, for your perusal

by Michael K. Edwards

Here's an implementation of an 8x8 integer DCT done with NEON intrinsics -- essentially a translation of the assembly version in libjpeg-turbo trunk: https://github.com/mkedwards/crosstool-ng/blob/master/patches/libjpeg-turbo… It is in a compilable (on Linaro 2011.05 GCC 4.5, anyway; a recent Linaro 4.6 snapshot ICEs) but otherwise untested state. Still, it's interesting to compare the assembly that it generates against the hand-written version. I thought I'd give linaro-toolchain a heads-up in case y'all could use a test case that generates plenty of pressure on the VFP/NEON register bank. (I intend to use it to see how much performance difference there really is, on the A8 and A9, between NEON code compiled for 16 vs. 32 registers.) Cheers, - Michael

14 years, 10 months

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Added an ARMv5E board

by Michael Hope

I've added a pico-SAM9G45 board to my home office setup. It's called libra1 and runs Debian 6.0. The nice thing about this board is it has 256 MB of RAM and should be able to run SPEC 2000. I'll start using it to check that our GCC changes don't cause significant performance regressions on earlier architectures. Dave, you could use it to test the 64 bit primitives if you want. There's more information on the configuration at: http://bazaar.launchpad.net/~michaelh1/+junk/hardware/view/head:/libra/r1/R… -- Michael

14 years, 10 months

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GCC cross compilation help: [cannot compute suffix of object files]

by mins.lin＠globalunichip.com

Hello, I tried to build the gcc-linaro cross compiler tool on the x86_64 ubuntu-10.04 machine. The build and host machine is the x86_64 ubuntu-10.04, the target is arm-eabi. But failed and got the following error messages: ----- checking host system type... arm-unknown-eabi checking for arm-eabi-ar... arm-eabi-ar checking for arm-eabi-lipo... arm-eabi-lipo checking for arm-eabi-nm... /home/minslin/ET0001A/build-gcc/./gcc/nm checking for arm-eabi-ranlib... arm-eabi-ranlib checking for arm-eabi-strip... arm-eabi-strip checking whether ln -s works... yes checking for arm-eabi-gcc... /home/minslin/ET0001A/build-gcc/./gcc/xgcc -B/home/minslin/ET0001A/build-gcc/./gcc/ -B/home/minslin/linaro-gcc/arm-eabi/bin/ -B/home/minslin/linaro-gcc/arm-eabi/lib/ -isystem /home/minslin/linaro-gcc/arm-eabi/include -isystem /home/minslin/linaro-gcc/arm-eabi/sys-include checking for suffix of object files... configure: error: in `/home/minslin/ET0001A/build-gcc/arm-eabi/libgcc': configure: error: cannot compute suffix of object files: cannot compile See `config.log' for more details. make[1]: *** [configure-target-libgcc] Error 1 make[1]: Leaving directory `/home/minslin/ET0001A/build-gcc' make: *** [all] Error 2 ----- The configure options I used were: ----- ../gcc-linaro-4.5-2011.06-0/configure --target=arm-eabi --enable-languages=c,c++ --enable-shared --prefix=/home/minslin/linaro-gcc --with-gmp=/home/minslin/gmp --with-mpfr=/home/minslin/mpfr --with-mpc=/home/minslin/mpc ----- I downloaded and built the GMP, MPFR and MPC packages. The versions I used are: gmp-5.0.2 mpfr-3.0.1 mpc-0.8.2 Please help me solving this problem. Thanks. Best regards, ------------------------------------------------------------ Min-Shong Lin (林敏雄) Engineering Division Global UniChip Corp. (創意電子) EMAIL : mins.lin(a)globalunichip.com TEL : +886-3-5646600 ext. 6937 --------------------------------- Email Confidentiality Notice ------------------------------------------ If you are not the intended recipient for this CONFIDENTIAL E-mail, please delete it immediately without keeping or distributing any copy and notify the sender. ----------------------------------------------------------------------------------------------------------------------

14 years, 10 months

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[ACTIVITY] 20th - 24th June

by Andrew Stubbs

Continued work on widening multiplies. Finally got a point where I have something I'm happy to post upstream! Posted here: http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08720.html Richard Guenther reviewed one of the patches, and found a flaw, so I've been working on addresssing that. Booked hotel for August sprint. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * Widening Multiplies 1/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08721.html * Widening Multiplies 2/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08723.html * Widening Multiplies 3/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08724.html * Widening Multiplies 4/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08725.html * Widening Multiplies 5/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08726.html * Widening Multiplies 6/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08727.html * Widening Multiplies 7/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08728.html

14 years, 10 months

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[ACTIVITY] 2011-06-24

by David Gilbert

== Atomics == * Testing the libgcc fallback code with Nicholas's kernel patch - and then fixing my initialisation code to use init_array's (thanks Richard for the hint) * Tidying stuff up after a review of my patch by Richard - the sync.md is now smaller than the original before I started. * Discussing sync semantics with Michael Edwards - he's spotted that the gcc ARM sync routines need to move their final memory barrier for the compare-exchange case where the compare fails. * Looking at valgrind; it looks like it should be OK with the commpage changes; but it doesn't currently support ldrexd and strexd; there is a patch for it to do ARM mode but not thumb yet. Dave

14 years, 10 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Catching up on email. * More experiementation with the auto inc/dec stuff. TBH, this has taken longer than expected, but I think it's close now. * Wrote a dejagnu testcase for PR 49196. Tested it on trunk and submitted it upstream. == Next week == * Backport fix for PR 49196. * Look at NEON reload failure. * More auto inc/dec. Richard

14 years, 10 months

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[ACTIVITY] report week 24

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: ||finish qemu-cont-integn || 2011-01-25 || 2011-01-25 || handed off || ||first qemu-linaro release || 2011-02-08 || 2011-02-08 || 2011-02-08 || ||qemu-linaro 2011-03 || 2011-03-08 || 2011-03-08 || 2011-03-08 || ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == other == * wrote a number of patches fixing issues identified by exhaustive testing of the ARM decoder. Still some parts of the Thumb decoder to deal with. * discussion about 1176 (somebody has some patches to add support for it) and what set of feature switches are needed to support this and the 1136r1 (they have most but not all of the v6K feature set) * sent some patches which deal with the "VLDM/VSTM generate too many TCG ops" bug by raising the limit on number of TCG ops * sent a pull request for some ARM patches that had been languishing on the mailing list * tracked down a regression making vexpress crash when run on upstream QEMU to a recent Xen-related patch * working on AFDS (annual review) paperwork Meetings: toolchain, standup Lots of interrupts/bugfixing/review recently means I'm drifting slightly behind schedule on blueprints. Need to refocus on those next week. Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 10 months

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[ACTIVITY] Jun 20 - Jun 24

by Ulrich Weigand

== GDB == * Completed setup and baseline run for remote gdb testsuite. This involved tracking down and working around a variety of problems including: - issues with the cross-compiler packages - board files and sysroot for the debugger to use - timing problems in the dejagnu harness - multiple problems in the GDB testsuite itself At this point, I'm down to about a dozen extra FAILs and about 2000 tests (out of 16000) tests that are not executed in the remote testsuite for one reason or the other. Next step will be to analyze those and create bug reports. Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

14 years, 10 months

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[ACTIVITY] June 19-23

by Ira Rosen

Hi, - investigating detection of general over-widening cases in the vectorizer - improvements of widen-mult - proposed for merge to gcc-linaro-4.6 - fixed PRs 49443 and 49478 Ira

14 years, 10 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * in order to have the android's debuggerd use libunwind I looked at libunwind's remote interface and especially the libunwind-ptrace lib that sits on top of that. * the remote interface seems a bit awkward to me. The user provides a set of callbacks to access the inferior memory or registers. Instead of using these callbacks to obtain the actual unwind information (eh_frame fro example) it requires the user implement another callback (find_proc_info) to lookup the unwind info himself. * the libunwind-ptrace currently deos not support the ARM specific unwind tables * started to look into how to improve the situation * not straight forward as it's tightly bound to eh_frame unw info and libunwinds DWARF parsing mechanism * attending a class this afternoon * Note: I'm on vacation starting in a few hours and I'll be back on Tuesday next week. Regards Ken

14 years, 10 months

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[Activity] Week ending 2011-06-17

by Ramana Radhakrishnan

== Progress == * Backported A5 / A15 tuning to Linaro GCC. Waiting for test results. * T2 perf. meeting. * Backported the neon length patch back. * Patch for PR49385 being tested. * Bootstraps broken yet again / upstream maintenance / test regressions. * Waiting on Branch_cost results . * Minor binutils patches as a result of upstream maintenance. == Plans == * Finish BRANCH_COST tuning * Look at VFP moves for some more . * Backport some of the upstream bug fixes that need to be done. Meetings: * 1-1s * TCWG call. * At Google unconference 17-19 June

14 years, 10 months

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[ACTIVITY] 13th - 18th June

by Andrew Stubbs

Chaired the Toolchain Working group call. Michael H was unavailable (but OK) following yet another earthquake in Christchurch. Continued working on my widening multiplies patches. I did think for a while there must be a logic flaw because it's using the wrong sized inputs to instructions, but on closer inspection that was taken care of in the RTL transformations. The changes I already had seem good in all the test cases I could generate. I've also identified a number of additional optimization opportunities, so I've been tweaking the patch for those. Continued trying to figure out why my Thumb2 constants patches break the native bootstrap build. The stage2 compiler enters an infinite loop, but I couldn't easily identify why, as yet. Backported Julian's unaligned access patches to a Linaro test branch. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html

14 years, 10 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Experimented more with A8 and A9 tuning for auto inc/dec addresses. * More work on the auto inc/dec pass itself. * Compared the assembly output in the GCC testsuite for a range of targets (avr, bfin, h8300, ia64, m32c, m32r, m68k, am33, pa, pdp11, powerpc, rx, score, sh, xstormy16 and vax). * Looked at a few bug reports. Will submit patches when I get back. == Next week == * Holiday! Richard

14 years, 10 months

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[ACTIVITY] 2011-06-17

by David Gilbert

== 64 bit Atomics == * Wrote more test cases; now have a nice 3 thread test that passes - and more importantly, it fails if I replace one of the atomic ops by a non-atomic equivalent. * Modified existing atomic helper code in libgcc to do 64bit * Added init function to 64bit atomic helper to detect presence of new kernel and fail if an old one is present. That last one is a bit of a pain; it now correctly exits on existing kernels and aborts; qemu user space seg faults because access to the kernel helper version address is uncaught. So first thing I need to do is try the early kernel patch Nicolas sent around, and then I really need to see if qemu can be firmly persuaded to run it. == String routines == * Ran denbench with sets of strlen; started running some spec as well. == QEmu == * Tested Peter's prelease tarball in user space and a bunch of system emulations - successfully managed to say hello to #linaro from an emulated overo board using USB keyboard. == Other == * Booked 4th July week off. Dave

14 years, 11 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * short week (Monday -> public holiday, Wednesday -> attended a class) * tested the gcc-linaro-4.5-2011.06 with linaro-android on my panda * works! no noticeable differences to 4.5-2011.05 for me * libgui.so apriori prelink issue remains: * realized that apriori works quite different from GNU prelink * checked the prelink map against LOAD segment size - looks good * build with -DLINKER_DEBUG=1 - still doesn't give hints * give up for know and moving on * made a patchset to be able to build whole android with -DDEBUG * except of v8 and webkit * zygote segfaults for unknown reason * understood the basics of the current backtracing mechanism on android * the bionic linker registers signal handlers on SIGSEGV that opens a socket * the debuggerd listens on that socket and gets its regs etc. using ptrace * Note: I'll be on vacation starting on Thursday next week Regards Ken

14 years, 11 months

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[ACTIVITY] Jun 14 - Jun 17

by Ulrich Weigand

== GDB == * Committed support for NEON registers in core dumps (bug #615972) to mainline GDB and binutils repositories. * Added support to readelf (mainline binutils) to correctly display NEON register core file notes. * Started looking into remote gdb testsuite. == GCC == * Investigated reload failure when building kernel with Linaro GCC 4.5 (discovered by Arnd). * Investigated stray function references due to partial inlining breaking kernel build with Linaro GCC 4.6 (discovered by Arnd). Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

14 years, 11 months

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[ACTIVITY] report week 24

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: ||finish qemu-cont-integn || 2011-01-25 || 2011-01-25 || handed off || ||first qemu-linaro release || 2011-02-08 || 2011-02-08 || 2011-02-08 || ||qemu-linaro 2011-03 || 2011-03-08 || 2011-03-08 || 2011-03-08 || ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || == omap3-usb-model == * fixed some corner case bugs revealed by Dave Gilbert's testing == linaro-qemu-11.11 == * qemu-linaro-2011.06 tested, uploaded and released on schedule == other == * pushed some patches fixing warnings on gcc 4.6 * exhaustive testing of the ARM decoder revealed that vfp load/store multiple with an overlarge immediate would try to store 256 regs and overrun the tcg buffer * set up an armv5 box and repro'd lp:739785 * working on AFDS (annual review) paperwork Meetings: toolchain, standup, GSoC student, 1-2-1, divisional comms. Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 11 months

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Generating ancillary sections with gas

by Dave Martin

Hi Michael, This thread about how to generate ancillary sections using gas has resurfaced again. Do you know who might be available from the toolchain group to take a look at this? It appears that this issue can best be solved by a change to gas (or, possibly, to gcc). Cheers ---Dave References: Dynamic patching in discarded sections <http://thread.gmane.org/gmane.linux.kernel/1152142> Generating ancilliary sections with gas <http://thread.gmane.org/gmane.linux.linaro.toolchain/686>

14 years, 11 months

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Interesting failure of vasprintf test from postler

by Marcin Juszkiewicz

There is a ftbfs on armel bug for postler: https://bugs.launchpad.net/ubuntu/+source/postler/+bug/791319 Attached test compiles fine on amd64 but fails on armel: 20:16 hrw@malenstwo:postler-0.1.1$ gcc _build_/.conf_check_0/test.c _build_/.conf_check_0/test.c: In function ‘main’: _build_/.conf_check_0/test.c:5:1: error: incompatible type for argument 3 of ‘vasprintf’ /usr/include/stdio.h:396:12: note: expected ‘__gnuc_va_list’ but argument is of type ‘char *’ Can someone explain me why this happens? Ubuntu armel and armhf cross compilers, CSL 2011.03-42 have same problem.

14 years, 11 months

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Chromium browser FTBFS on armel

by Marcin Juszkiewicz

Hi Yesterday I looked at bug [1] in chromium-browser but checked oneiric version: 12.0.742.91~r87961. It failed on linking to CUPS libraries so I looked at upstream repository and found fix [2]. With patch applied it failed on same place: LINK(target) out/Release/chrome [keep-alive] czw, 16 cze 2011, 18:21:39 CEST (441 min) /usr/bin/ld.bfd.real: out/Release/obj.target/third_party/cacheinvalidation/../../cacheinvalidation_proto_cpp/gen/protoc_out/google/cacheinvalidation/internal.pb.o(.text._ZN12invalidation21ClientToServerMessage27MergePartialFromCodedStreamEPN6google8protobuf2io16CodedInputStreamE+0x7d2): unresolvable R_ARM_THM_CALL relocation against symbol `operator new(unsigned int)@@GLIBCXX_3.4' /usr/bin/ld.bfd.real: final link failed: Nonrepresentable section on output collect2: ld returned 1 exit status make[1]: *** [out/Release/chrome] Error 1 make[1]: Leaving directory `/home/hrw/devel/porting-jam/chromium-browser-12.0.742.91~r87961/build-tree/src' make: *** [debian/stamp-makefile-build] Error 2 dpkg-buildpackage: error: debian/rules build gave error exit status 2 According to bugs [3][4] package may work when built without -fPIE but (as Loic wrote in [3]) "-fPIE is needed for some security features and web browsers are a critical piece of software that we want to protect". May someone take a look at this issue? One warning: this fail happens after 440 minutes of build on PandaBoard with usb hdd (took 1.8GB of space). If needed I can provide account on my panda with access to build directory (but this rather tomorrow then today) - IPv6 address only. 1. https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/791283 2. http://git.chromium.org/gitweb/?p=chromium/chromium.git;a=patch;h=c2b99f3fe… 3. https://bugs.launchpad.net/binutils-linaro/+bug/641126 4. http://code.google.com/p/chromium/issues/detail?id=55439

14 years, 11 months

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[ACTIVITY] June 12-16

by Ira Rosen

Hi, - fix vectorizer testsuite failures on ARM - committed - committed a fix of a bug in the vectorizer revealed by the widen-mult patch - committed an improvement of peeling heuristic - reduce over-widening in case of multiplication by a constant (improves vectorized rgbyiq by almost 2x) - committed - started backporting to gcc-linaro-4.6 Ira

14 years, 11 months

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[ACTIVITY] Weekly status

by Revital Eres

- Opened PR49385. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49385 - Committed SMS patch to fix recent bootstrap fail on ARM with SMS flags http://gcc.gnu.org/ml/gcc-patches/2011-06/msg00960.html - Committed SMS patch to Fix calculation of row_rest_count http://gcc.gnu.org/ml/gcc-patches/2011-06/msg01008.html Continue with Spec2006 analysis https://wiki.linaro.org/Internal/ToolChain/Benchmarks - Next two weeks (17 Jun to 2 July) --- vacation.

14 years, 11 months

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Linaro QEMU 2011.06 released

by Peter Maydell

The Linaro Toolchain Working Group is pleased to announce the release of Linaro QEMU 2011.06. Linaro QEMU 2011.06 is the latest monthly release of qemu-linaro. Based off upstream (trunk) QEMU, it includes a number of ARM-focused bug fixes and enhancements. This release introduces two new features; these are still experimental so please report any issues: - A model of the Gumstix Overo board; this is an OMAP3 based system similar to Beagle but with the advantage of having supported onboard ethernet. - USB keyboard and mouse support, if your kernel includes support for the OMAP3 OHCI controller (not just EHCI). Try adding "-device usb-kbd -device usb-mouse" to your QEMU command line for Beagle or Overo models. Other interesting changes include: - A fix for the lack of graphics output on the Beagle model when running the Linaro 11.05 final release image - Suppression of the "Bad register 0x000000f8" warnings provoked by the Linaro 11.05 final release kernels - As usual, various minor correctness fixes and other upstream changes Known issues: - The beagle and beaglexm models still do not support USB networking - There are some gcc 4.6 warnings about "variable set but not used" which have not yet been resolved; Ubuntu Oneiric's gcc makes these non-fatal, but if you're building with an upstream gcc 4.6 you may need to add the "--disable-werror" option to configure The source tarball is available at: https://launchpad.net/qemu-linaro/+milestone/2011.06 Binary builds of this qemu-linaro release are being prepared and will be available shortly for users of Ubuntu. Packages will be in the linaro-maintainers tools ppa: https://launchpad.net/~linaro-maintainers/+archive/tools/ More information on Linaro QEMU is available at: https://launchpad.net/qemu-linaro

14 years, 11 months

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