linaro-toolchain September 2016

linaro-toolchain@lists.linaro.org

15 participants
27 discussions

New IRC Channel for Linaro Toolchain Working Group

by Matthew Gretton-Dann

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

2 years, 9 months

[ANNOUNCE] Linaro Binary Toolchain Release GCC 6.1-2016.08

by Ryan Arnold

The Linaro Binary Toolchain ============================ The Linaro GCC 6.1-2016.08 Release is now available. The GCC 6 Release series has significant changes from the GCC 5 release series. For an explanation of the changes please see the following website: https://gcc.gnu.org/gcc-6/changes.html For help in porting to GCC 6 please see the following explanation: https://gcc.gnu.org/gcc-6/porting_to.html Download release packages from: http://releases.linaro.org/components/toolchain/gcc-linaro/6.1-2016.08/ http://releases.linaro.org/components/toolchain/binaries/6.1-2016.08/ Previous snapshots and release-candidates are at: http://snapshots.linaro.org/components/toolchain/binaries/ Previous releases are at: http://releases.linaro.org/components/toolchain/binaries/ Host Requirements ================== Linaro officially supports the current and previous Ubuntu LTS releases (as of the time of this release). This does not mean that the toolchain will not work on other/older Linux distributions. See the following for the life-time of Ubuntu LTS releases. https://wiki.ubuntu.com/Releases The host system upon which the cross-compiler will run requires a minimum of glibc 2.14, because of API changes to glibc's memcpy API. https://bugs.linaro.org/show_bug.cgi?id=1869 Package Versions ================= Linaro GCC 6.1-2016.08 http://releases.linaro.org/components/toolchain/gcc-linaro/6.1-2016.08/ FSF glibc 2.23 (linaro/2.23) https://www.sourceware.org/ml/libc-alpha/2016-08/msg00212.html Linaro newlib 2.4.0-2016.03 (linaro-2.4-branch) Linaro binutils 2.27 (linaro_binutils-2_27-branch) https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob_plain;f=bin… FSF GDB 7.11 (binutils-gdb.git~gdb-7.11-branch) https://lists.gnu.org/archive/html/info-gnu/2016-02/msg00010.html Linaro toolchain package git branches are hosted at: http://git.linaro.org/?a=project_list&s=toolchain%2F&btnS=Search NEWS for Linaro GCC 6.1-2016.08 ================================ * Include GNU Linker fix. commit fbc6c6763e70cb2376e2de990c7fc54c0ee44a59 Author: Nick Clifton <nickc(a)redhat.com> Date: Tue Aug 23 09:45:11 2016 +0100 Fix seg-fault in ARM linker when trying to parse a binary file. * Copy the libwinpthread DLL into the bin directories so it gets into the tmp directory before tar is run. https://review.linaro.org/#/c/13723/ * Include GNU Assembler fix for PR 20364 commit 5fe7ebe5ab43750abf8f490b785d99a1e598e7fd Author: Nick Clifton <nickc(a)redhat.com> Date: Fri Aug 5 10:37:57 2016 +0100 Fix the generation of alignment frags in code sections for AArch64. https://sourceware.org/bugzilla/show_bug.cgi?id=20364 * Performance related backports from Linaro GCC 6.1-2016.06, and Linaro GCC 6.1-2016.07 have been included. See the following Linaro GCC snapshots: http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.1-2016.06/ http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.1-2016.07/ Contact Linaro =============== File bugs at http://bugs.linaro.org For Linaro member support see http://support.linaro.org For Linaro community support email linaro-toolchain(a)lists.linaro.org -- Ryan S. Arnold | Linaro Toolchain Engineering Manager ryan.arnold(a)linaro.org | ryanarn on #linaro-tcwg @ freenode.irc.net

7 years, 6 months

[ACTIVITY] 19 - 23 September 2016

by Diana Picus

== Progress == * [Lab] ASAN test fails with glibc 2.23 [TCWG-811] [4/10] - This issue is keeping us from moving one of the TK1 bots into production - Committed a patch upstream, but it broke on an x86_64 bot when compiling with -m32 - I tracked the problem to the wrong glibc function being used when -fsanitize=address is provided on the command line - Reported the problem on the mailing list * Add worktree module to tcwg-release-tools [TCWG-783] [4/10] - Made good progress on this, should be ready for review soon * Misc [2/10] - Code reviews, preparing for Connect

7 years, 6 months

[Activity] 19-23 September 2016

by Peter Smith

== Activity == Exceptions. Another attempt at ARM exceptions support. I did get some more fine grained comments back which have been addressed, but no approval to commit yet. Some follow up over whether ld -r support for merging output sections is necessary, answer seems to be yes as kernel modules depend on it. I've volunteered to post a simpler patch without ld -r support as this is a very niche use case. Not had any feedback yet so will just post it next week. TLS Fixed TLS support in lld so that it does not attempt to follow lld's generic relaxation model, which can't be implemented in ARM. Still some work to do for static linking. == Next Week == Out of office at Linaro Connect in Las Vegas == Planned Absences == Holiday 10th to 14th October

7 years, 6 months

[Activity] 19-23 September 2016

by Yao Qi

* Two days off [4/10] # Progress # * TCWG-685, GDB 7.12 release. [2/10] Patch "keep RES0 bits in CPSR" is pushed into mainline and 7.12. Find a GDBserver bug, and open PR 20627. It is target independent, but may block the release. :( * TCWG-518, Range stepping in ARM. [3/10] Regression test is done. Find some other issues exposed by my patches, and fix them. Need to post patches upstream for review. * Misc [1/10] Close gdbserver in mi_gdb_exit. The bug breaks the aarch64 multi-arch testing. Patch is pushed in. File expense for GNU Cauldron travel. # Plan # * Linaro Connect. -- Yao Qi

7 years, 6 months

AArch64: Disabling conditional execution

by Fernando Endo

Hello, I'm using Linaro GCC 4.9-2015.01-3 for AArch64, and trying to disable the generation of guarded instructions. More specifically, I'd like not to see instructions such as 'cset', 'csinc', 'ccmp', 'fccmp', etc. So far, it seemed that the flag '-fno-if-conversion2' could do the job, but I still see those instructions in my disassembled program functions (I guess that it may not be possible to remove them from standard libs). My command line: aarch64-linux-gnu-gcc -static -march=armv8-a -O3 -fno-strict-aliasing -fno-if-conversion2 I also tried '-fno-if-conversion' and both '-fno-if-conversion -fno-if-conversion2' without success. Regards, -- Fernando A. Endo, Post-doc INRIA Rennes-Bretagne Atlantique France

7 years, 6 months

[ACTIVITY] Week 37

by Yvan Roux

o Travel from Cauldron (2/10) o One day off (2/10) == Progress == o Linaro GCC/Validation (7/10) - Started backports for 2016.10 - Investigating 4.9.4 branch marge validation issues - Extended validation monitoring, tried to reproduce an OOM issue. o Misc (3/10) * Various meetings and discussions. * Connect preparation == Plan == o Tuesday off o Continue on-going tasks and travel to LAS16

7 years, 7 months

[ACTIVITY] 12-16 September 2016

by Christophe Lyon

== Progress == * Validation - patch reviews (Jenkins jobs, abe) * GCC - reported a few regressions on trunk - looked at making reporting scripts more robust at handling DejaGnu errors that could otherwise be un-noticed * Binutils - backported a fix from trunk to linaro-2.27 branch, to close bug 2518 (linker SEGV) - investigating https://sourceware.org/bugzilla/show_bug.cgi?id=20608 "Relocation truncated to fit: R_ARM_THM_JUMP24 for relocation to PLT entry" * misc (conf-calls, meetings, emails, ....) - Connect preparation == Next == - monitor GCC trunk regressions - release scripts/abe - backports/reviews - Binutils bug 20608

7 years, 7 months

[ACTIVITY] 5-11 September 2016

by Christophe Lyon

== Progress == * Validation - patch reviews (Jenkins jobs, abe) - helped on release infra/scripts * GNU Cauldron - useful discussion with several maintainers * GCC - progress on PR 67591 (ARM v8 Thumb IT blocks deprecated) First patch posted, I will need benchmark results. * misc (conf-calls, meetings, emails, ....)

7 years, 7 months

[ACTIVITY] 12 - 16 Sep 2016

by kugan

== Progress == - Connect slides - Return jump function - working on prototype - Revised and posted early-vrp - Revised and posted patch for PR72835 == Next == - Work on IPA/LTO improvements - Wrap-up connect slides - Follow up on pending patches

7 years, 7 months

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linaro-toolchain September 2016