There's already a couple of tools-related questions on here. We should
probably make sure we monitor it regularly.
This isn't to hard, once you're signed up, you can mark certain topics
as 'interesting' and then you'll get email notifications when there's a
post.
Andrew
-------- Original Message --------
Subject: Linaro forums replaced by "Ask Linaro"
Date: Fri, 06 May 2011 15:58:53 +0200
From: Michael Opdenacker <michael.opdenacker(a)linaro.org>
Organization: Linaro
To: everyone <everyone(a)linaro.org>
Greetings,
We are pleased to announce the replacement of our forums by a new "Ask
Linaro" service.
Better than forums, we expect this service to bring more questions and
answers, and incite people to join the Linaro community by sharing their
experience.
We count on your participation.
See http://ask.linaro.org/
Cheers,
Michael.
--
Michael Opdenacker - Community Manager
Linaro, http://linaro.org
Cell: +33 621 604 642
IRC: 'opm' in #linaro on irc.freenode.net
Hi all,
We seem to have had an accident!
This morning I merged one of my patches to lp:gcc-linaro/4.6, and this
afternoon I got an email from Launchpad notifying me that a mystery
revision had been deleted.
It seems that Richard has somehow overwritten my change with his.
Luckily I've spotted it and will fix it now, but it could very easily
have got lost.
I'm not sure what's happened here, but I'm pretty sure bzr does not just
do this silently. I thought you needed to specify --overwrite to do this
on purpose, but perhaps there's a bzr bug here?
Anyway, could everyone please be very careful when they do bzr push to
the release branches.
Thanks
Andrew
Hello,
[1] Regarding the patch 'Support closing_branch_deps'
http://gcc.gnu.org/ml/gcc-patches/2011-03/msg00350.html
Continued discussions with Ayal Zaks (SMS maintainer) regrading this patch.
(http://gcc.gnu.org/ml/gcc-patches/2011-05/msg00250.html)
I'm now working on simplifying the patch for resubmission according the
recommendation.
[2] Regarding the patch 'Avoid considering debug_insn when calculating SCCs'
http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01294.html The problem exposed
while testing patch [3] and it seems that is part of a bigger problem -- SMS
does not support debug_insn properly.
I've asked Alexandre Oliva who inserted the support for debug_insn to haifa
sched and selective sched to help with that.
[3] Regarding the patch 'Support instructions with REG_INC_NOTE'
http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01309.html
The fix for debug_insn (which the patch [2] tries to solve) is needed for
bootstrapping this patch. So I'm putting it on hold for now.
Thanks,
Revital
Hi,
- backported vzip fix to GCC 4.5 and 4.6 (PR 48252)
- merged auto-detection of vector size patch to gcc-linaro 4.6
- started looking into vectorization of ffmpeg
Ira
Hi,
I am trying add usb gadget mass storage to uboot , and got run-time
abortion on usbmsd.c with the default u-boot Os option. I use linaro
2011.03 4.5.3 version, and my trials as following:
1) During debugging , I found the abort exception in
usbmsd_init_strings(). if declaring it with noinline function, like
static void usbmsd_init_strings (void)
__attribute__((noinline));
it works, however, next steps still failed.
2) compling uboot with O0, everyhing is ok.
3) try other toolchain. It works with codesourcery's 2011.03-41
and ubuntu 4.5 version, while failed with 2011.04 4.5 linaro version.
4) I have dumped the obj files, seeming some funcs optimized
,analysing the details is out of my knowledge, :( . please check the
src and objdump files in one compressed file)
toolchain:
ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$
arm-none-linux-gnueabi-gcc --v
Using built-in specs.
COLLECT_GCC=arm-none-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/home/ypluo/work/Current/Tools/toolchain/linaro-201103-csr-build-armv7-vfpv3_x86_32/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.3/lto-wrapper
Target: arm-none-linux-gnueabi
Configured with:
/media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/gcc-linaro-4.5-2011.03-0/configure
--target=arm-none-linux-gnueabi
--prefix=/media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/tools
--enable-languages=c,c++ --with-arch=armv7-a --with-float=softfp
--with-fpu=vfpv3-d16 --with-mode=thumb --enable-shared
--enable-multiarch --enable-threads=posix --enable-nls
--enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --disable-werror
--with-pkgversion='Ubuntu/Linaro 4.5-2011.3-csr-build'
--enable-poison-system-directories
Thread model: posix
gcc version 4.5.3 20110221 (prerelease) (Ubuntu/Linaro 4.5-2011.3-csr-build)
ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$
/home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc --v
Using built-in specs.
COLLECT_GCC=/home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/mywork/toolchain/arm-2011.03/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.2/lto-wrapper
Target: arm-none-linux-gnueabi
Configured with:
/scratch/janisjo/arm-linux-lite/src/gcc-4.5-2011.03/configure
--build=i686-pc-linux-gnu --host=i686-pc-linux-gnu
--target=arm-none-linux-gnueabi --enable-threads --disable-libmudflap
--disable-libssp --disable-libstdcxx-pch
--enable-extra-sgxxlite-multilibs --with-arch=armv5te --with-gnu-as
--with-gnu-ld --with-specs='%{save-temps: -fverbose-asm}
%{funwind-tables|fno-unwind-tables|mabi=*|ffreestanding|nostdlib:;:-funwind-tables}
-D__CS_SOURCERYGXX_MAJ__=2011 -D__CS_SOURCERYGXX_MIN__=3
-D__CS_SOURCERYGXX_REV__=41 %{O2:%{!fno-remove-local-statics:
-fremove-local-statics}}
%{O*:%{O|O0|O1|O2|Os:;:%{!fno-remove-local-statics:
-fremove-local-statics}}}' --enable-languages=c,c++ --enable-shared
--enable-lto --enable-symvers=gnu --enable-__cxa_atexit
--with-pkgversion='Sourcery G++ Lite 2011.03-41'
--with-bugurl=https://support.codesourcery.com/GNUToolchain/
--disable-nls --prefix=/opt/codesourcery
--with-sysroot=/opt/codesourcery/arm-none-linux-gnueabi/libc
--with-build-sysroot=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/libc
--with-gmp=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-mpfr=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-mpc=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-ppl=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic
-lm' --with-cloog=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-libelf=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--disable-libgomp --enable-poison-system-directories
--with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin
--with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin
Thread model: posix
gcc version 4.5.2 (Sourcery G++ Lite 2011.03-41)
Please let me know if other info needed.
Many thanks.
Yuping
Hi,
I am trying add usb gadget mass storage to uboot , and got
run-time abortion on usbmsd.c with the default u-boot Os option. I
use linaro 2011.03 4.5.3 version, and my trials as following:
1) During debugging , I found the abort exception in
usbmsd_init_strings(). if declaring it with noinline function, like
static void usbmsd_init_strings (void) __attribute__((noinline));
it works, however, next steps still failed.
2) compling uboot with O0, everyhing is ok.
3) try other toolchain. It works with codesourcery's 2011.03-41
and ubuntu 4.5 version, while failed with 2011.04 4.5 linaro version.
4) I have dumped the obj files, seeming some funcs optimized ,
analysing the details is out of my knowledge, :( . please check the
attached three files.
toolchain:
ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$
arm-none-linux-gnueabi-gcc --v
Using built-in specs.
COLLECT_GCC=arm-none-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/home/ypluo/work/Current/Tools/toolchain/linaro-201103-csr-build-armv7-vfpv3_x86_32/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.3/lto-wrapper
Target: arm-none-linux-gnueabi
Configured with:
/media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/gcc-linaro-4.5-2011.03-0/configure
--target=arm-none-linux-gnueabi
--prefix=/media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/tools
--enable-languages=c,c++ --with-arch=armv7-a --with-float=softfp
--with-fpu=vfpv3-d16 --with-mode=thumb --enable-shared
--enable-multiarch --enable-threads=posix --enable-nls
--enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --disable-werror
--with-pkgversion='Ubuntu/Linaro 4.5-2011.3-csr-build'
--enable-poison-system-directories
Thread model: posix
gcc version 4.5.3 20110221 (prerelease) (Ubuntu/Linaro 4.5-2011.3-csr-build)
ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$
/home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc
--v
Using built-in specs.
COLLECT_GCC=/home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/mywork/toolchain/arm-2011.03/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.2/lto-wrapper
Target: arm-none-linux-gnueabi
Configured with:
/scratch/janisjo/arm-linux-lite/src/gcc-4.5-2011.03/configure
--build=i686-pc-linux-gnu --host=i686-pc-linux-gnu
--target=arm-none-linux-gnueabi --enable-threads --disable-libmudflap
--disable-libssp --disable-libstdcxx-pch
--enable-extra-sgxxlite-multilibs --with-arch=armv5te --with-gnu-as
--with-gnu-ld --with-specs='%{save-temps: -fverbose-asm}
%{funwind-tables|fno-unwind-tables|mabi=*|ffreestanding|nostdlib:;:-funwind-tables}
-D__CS_SOURCERYGXX_MAJ__=2011 -D__CS_SOURCERYGXX_MIN__=3
-D__CS_SOURCERYGXX_REV__=41 %{O2:%{!fno-remove-local-statics:
-fremove-local-statics}}
%{O*:%{O|O0|O1|O2|Os:;:%{!fno-remove-local-statics:
-fremove-local-statics}}}' --enable-languages=c,c++ --enable-shared
--enable-lto --enable-symvers=gnu --enable-__cxa_atexit
--with-pkgversion='Sourcery G++ Lite 2011.03-41'
--with-bugurl=https://support.codesourcery.com/GNUToolchain/
--disable-nls --prefix=/opt/codesourcery
--with-sysroot=/opt/codesourcery/arm-none-linux-gnueabi/libc
--with-build-sysroot=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/libc
--with-gmp=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-mpfr=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-mpc=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-ppl=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic
-lm' --with-cloog=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-libelf=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--disable-libgomp --enable-poison-system-directories
--with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin
--with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin
Thread model: posix
gcc version 4.5.2 (Sourcery G++ Lite 2011.03-41)
Please let me know if other info needed.
Many thanks.
Yuping
My MOVW patch from last week left an unused variable that killed -Werror
builds, so I posted a new patch to fix it.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04141.html
Ramana approved that in record time, so I've committed it.
Tom has committed Mark Shinwell's BRANCH_COST patch upstream, so I have
backported it to Linaro GCC 4.6.
Maxim has committed his compound conditionals patch upstream, so I've
backported that to Linaro GCC 4.6 also.
Reviewed what other patches are queued for forward porting to 4.6/7,
hoping that other's might have picked some of them off, and found no
other progress just yet.
Reduced the test case for GCC PR48783. For some reason it is retaining
".global" directives for symbols that have been optimized away, which
leads to link errors in the kernel build.
Tried to find out why the "discourage neon in A8" patch has caused test
failures. I'm still not sure - I've asked Michael Hope to rerun the
tests in case it's just random.
Reposted the EABI half-precision patch with the extra bits Joseph says
it needed in the version scripts.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04251.html
Looked at the linking problem reported by Barry Song on the
linaro-toolchain list.
* Other
Public holidays on Monday and Friday.
* Future
I will be attending UDS in Budapest from 8th - 14th May. I shall
continue to read my email, but will not be attending any calls.
----
Upstream patched requiring review:
* NEON scheduling patch
http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html
* ARM Thumb2 addw/subw support.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html
* ARM Thumb2 Replicated constants
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03883.html
* ARM EABI half-precision function names (reposted 2011-04-27).
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04251.html
== Last week ==
* CoreMark ARMv6/v7 regression patch set for combine: exchanged some
comments on upstream list with Jeff Law. Started some testing on
powerpc64, hit some issues with native bootstrap that I
don't think I completely overcome, but at least completed a 32-bit
bootstrap successfully. Unfortunately hit two regressions after running
tests, will work on fixing this week, and update the upstream submission.
* PR48783: unused reference to __aeabi_uldivmod. Investigated and found
this to be a case where during RTL expand, .global directives for the
__aeabi_* runtime symbols are directly inserted after some div optab
didn't have the insns, and a libfunc was to be used. However later
optimizations that removed the divisions left the .global symbols
dangling with no uses. We could probably just avoid adding the
directives completely for the EABI functions.
* PR42017: ARM LR register not used in leaf functions. This is a case
where DF takes EPILOGUE_USES as part of the initial live registers at
end of functionn, and liveness computations never get to kill it, since
there are no function calls to clobber in a leaf function. Submitted a
patch to remove LR from EPILOGUE_USES before reload, awaiting review.
* LP #689887: investigated more; not much progress, but found that the
bootstrap fail happens only under --with-mode=thumb (Thumb-2). Under ARM
mode the native bootstrap succeeds.
== This week ==
* Try to fix the problems with the CoreMark combine patches.
* Investigate more optimizations/bugs.
* Prepare for travel to Budapest on Saturday.
Hello,
- Continued analysing DENbench benchmarks.
- Discussed the SMS patched with Ayal Zaks (SMS maintainer).
- Booked the flights for Budapest summit.
Thanks,
Revital
