linaro-toolchain

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[ACTIVITY] 5-9 June 2017

by Christophe Lyon

Short week (Monday off) == Progress == * Infrastructure/validation: - reviews - noticed ~random results in one binutils test on apm/tk1, didn't understand the problem yet. Manual runs all succeeded :( * Benchmarking: - comparison script/job - reviews * GCC: - benchmarking old 'deprecated IT-blocks' patch. Seems to confirm large regressions on some benchmarks, and non-functional on at least one bench. - sent updated testsuite patch to support -march=armv5t runtestflags after dejagnu update - testing: checked a config --with-cpu=arm10tdmi instead of forcing -march-armv5t via runtestflags, to see how the validation results differ: not much, so if my previous patch is not accepted, I might change the configurations I use for non-regression testing - reported a couple of regressions on trunk * misc (conf-calls, meetings, emails, ....)

7 years, 5 months

[ANNOUNCE] Linaro Binary Toolchain Release GCC 7.1-2017.05

by Yvan Roux

The Linaro Binary Toolchain ============================ The Linaro GCC 7.1-2017.05 Release is now available. *Notice*: GCC 7.1 ABI change for arm*-*-* targets, and note for aarch64*-*-* targets >From GCC 7.1 release notes: On ARM targets (arm*-*-*), a bug introduced in GCC 5 that affects conformance to the procedure call standard (AAPCS) has been fixed. The bug affects some C++ code where class objects are passed by value to functions and could result in incorrect or inconsistent code being generated. This is an ABI change. If the option -Wpsabi is enabled (on by default) the compiler will emit a diagnostic note for code that might be affected. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728 GCC 5 and GCC 6 releases will continue to be affected by the ABI bug, since changing ABI in these releases is not practical. A warning enabled by -Wpsabi option was added to GCC 5 and GCC 6 toolchains to diagnose codebases that might be affected by the ABI bug. Additionally, this same bug was present in AArch64 backend in development versions of GCC 7. There was no releases of GCC with this bug present in AArch64 backend, therefore the release notes does not mention this. However, be advised that any code bases built with development versions of GCC 7 need to be recompiled with released version of GCC 7 to conform to ABI. For an explanation of GCC 7 series changes please see the following website: https://gcc.gnu.org/gcc-7/changes.html For help in porting to GCC 7 please see the following explanation: https://gcc.gnu.org/gcc-7/porting_to.html Download release packages from: (sources) http://releases.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05/ (binaries) http://releases.linaro.org/components/toolchain/binaries/7.1-2017.05/ 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/ A description of the arm and AArch64 target triples can be found at: https://collaborate.linaro.org/display/TCWGPUB/ARM+and+AArch64+Target+Tripl… 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 7.1-2017.05 http://releases.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05/ FSF glibc 2.25 (release/2.25) https://lists.gnu.org/archive/html/info-gnu/2017-02/msg00002.html Newlib 2.5 (newlib-2_5_0 tag) https://sourceware.org/ml/newlib/2016/msg01191.html GNU Binutils 2.28 (binutils-2_28-branch) https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob_plain;f=bin… FSF GDB 8.0 (gdb-8.0-branch) https://sourceware.org/ml/gdb-announce/2017/msg00003.html Linaro toolchain package git branches are hosted at: http://git.linaro.org/toolchain NEWS for GCC 7 (as of Linaro GCC 7.1-2017.05) ============================================== * Performance related backports from the following snapshots have been included: Linaro GCC 7.1-2017.05. See the following Linaro GCC snapshots: http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05/ 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

7 years, 5 months

[ACTIVITY] 29 May - 2 June 2017

by Peter Smith

Progress - Long range thunks Committed a couple of refactorings on .ARM.exidf and SHF_LINK_ORDER support. With luck final patch for SHF_LINK_ORDER will be approved next week Submitted patches to convert existing Thunk Implementation to use InputSectionDescriptions. Hopefully these ones are broken down into small enough parts for upstream to look at. - Tracked down https://bugs.llvm.org/show_bug.cgi?id=33136 libc++ failing ~100 tests with std::bad_cast exception when built in release mode. Was down to global-merge incorrectly merging globals that were not DSO local. Looks to have been fixed quickly - llvm-mc Helped out with D33436 review on how to do interworking branches in assembler D33492 accepted, will commit next week. Plans: - Long range thunks Continue with slow progress towards upstreaming - Investigate compiler-rt

7 years, 5 months

[ACTIVITY] Week 22

by Yvan Roux

== Progress == o Linaro GCC/Validation (7/10) * Deployed 7.1 release candidate * Catching up with re-association development * Preparing switch to abe/tested branch o Misc (3/10) * Various meetings and discussions. == Plan == o release 7.1 2017.05 o Continue on re-association

7 years, 5 months

[ACTIVITY] 29 May - 2 June 2017

by Diana Picus

== Progress == * [GlobalISel] AArch64 test-suite and self-host [TCWG-1074] [3/10] - Reported and investigated a codegen issue introduced by one of Quentin's patches, which was appearing while selfhosting with GlobalISel - Ran the test-suite and self-host again after it was fixed * [ARM GlobalISel] Add support for struct / array args [TCWG-1033] [3/10] - Committed the lowering part upstream - Still needs support in the rest of the pipeline but that will be a different issue * [Helper scripts] Add "push" capability [TCWG-1141] [1/10] - Started writing tests * Misc [3/10] - Meetings, mailing lists, babysitting the buildbots - [GlobalISel] Run precommit for Daniel's patch [TCWG-1142]: did another run for this - LLVM 4.0.1 [TCWG-1136]: ran rc2 on ARM and AArch64 == Plan == * [ARM GlobalISel] Fix arm-irtranslator test [TCWG-1146] * Replace D01s by Scaleway boards [TCWG-836] * More GlobalISel stuff

7 years, 5 months

[ACTIVITY] 29 May-2 June 2017

by Christophe Lyon

== Progress == * Infrastructure: - improvements in binutils Jenkins jobs, to track regressions rather than always report 'failed'. Pass ratio can still be very low in some configs (eg arm-pe) * Benchmarking: - work around problems with many simultaneous ssh connexions for remote cross-compilation * GCC: - benchmarked old 'deprecated IT-blocks' patch. - reported a few regressions in trunk - looking at testsuite-isms: problems with some multilibs after dejagnu upgrade (where multilib flags are now prepended, rather than appended previously) * misc (conf-calls, meetings, emails, ....) == Next == * Short week (off Monday) * Benchmarking scripts * GCC

7 years, 6 months

[ACTIVITY] 22 - 26 May 2017

by Peter Smith

Progress - Long range thunks Made some more progress on the refactoring needed to merge the representations for the script and non-script cases. Close to getting the .ARM.exidx sections converted. - Some thoughts on https://reviews.llvm.org/D33436 to do with ARM/Thumb interworking in the assembler. -- Discovered that gold and lld get the case of a relocation to a Thumb non STT_FUNC symbol with bit 0 clear wrong. Both linkers attempt to interwork (they shouldn't as the symbol is not STT_FUNC) but identify the symbol as ARM due to bit 0 being clear. Luckily these are corner cases only brought up by hand-written assembler. - Investigation into https://bugs.llvm.org/show_bug.cgi?id=33136 libc++ failing ~100 tests with std::bad_cast exception when built in release mode (clean upstream build uses debug). -- Reduced failing test to std::cout << std::endl; the std::bad_cast comes from an out of range index into a vector of available locales. -- Current thought is that this could be a codegen bug as I can only reproduce in Release (-O3) and not RelWithDebInfo (-O2). Plans for next week: - Long range thunks Make more progress on refactoring. Should get .ARM.exidx patches upstream, next step to convert long range thunks themselves. - Work on diagnosing PR33136.

7 years, 6 months

[ANNOUNCE] Linaro Binary Toolchain Release-Candidate GCC 7.1-2017.05-rc1

by Yvan Roux

The Linaro Binary Toolchain ============================ The Linaro GCC 7.1-2017.05-rc1 Release-Candidate is now available. *Notice*: GCC 7.1 ABI change for arm*-*-* targets, and note for aarch64*-*-* targets >From GCC 7.1 release notes: On ARM targets (arm*-*-*), a bug introduced in GCC 5 that affects conformance to the procedure call standard (AAPCS) has been fixed. The bug affects some C++ code where class objects are passed by value to functions and could result in incorrect or inconsistent code being generated. This is an ABI change. If the option -Wpsabi is enabled (on by default) the compiler will emit a diagnostic note for code that might be affected. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728 GCC 5 and GCC 6 releases will continue to be affected by the ABI bug, since changing ABI in these releases is not practical. A warning enabled by -Wpsabi option was added to GCC 5 and GCC 6 toolchains to diagnose codebases that might be affected by the ABI bug. Additionally, this same bug was present in AArch64 backend in development versions of GCC 7. There was no releases of GCC with this bug present in AArch64 backend, therefore the release notes does not mention this. However, be advised that any code bases built with development versions of GCC 7 need to be recompiled with released version of GCC 7 to conform to ABI. For an explanation of GCC 7 series changes please see the following website: https://gcc.gnu.org/gcc-7/changes.html For help in porting to GCC 7 please see the following explanation: https://gcc.gnu.org/gcc-7/porting_to.html Download release-candidate packages from: (sources) http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05-rc1/ (binaries) http://snapshots.linaro.org/components/toolchain/binaries/7.1-2017.05-rc1/ 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/ A description of the arm and AArch64 target triples can be found at: https://collaborate.linaro.org/display/TCWGPUB/ARM+and+AArch64+Target+Tripl… 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 7.1-2017.05-rc1 http://releases.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05-rc1/ FSF glibc 2.25 (release/2.25) https://lists.gnu.org/archive/html/info-gnu/2017-02/msg00002.html Newlib 2.5 (newlib-2_5_0 tag) https://sourceware.org/ml/newlib/2016/msg01191.html GNU Binutils 2.28 (binutils-2_28-branch) https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob_plain;f=bin… FSF GDB 8.0 (gdb-8.0-branch) https://sourceware.org/ml/gdb-announce/2017/msg00001.html Linaro toolchain package git branches are hosted at: http://git.linaro.org/toolchain NEWS for GCC 7 (as of Linaro GCC 7.1-2017.05-rc1) ================================================== * Performance related backports from the following snapshots have been included: Linaro GCC 7.1-2017.05. See the following Linaro GCC snapshots: http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05/ 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

7 years, 6 months

[ACTIVITY] 22-24 May 2017

by Christophe Lyon

Short week (Off Thursday/Friday) == Progress == * Infrastructure: - improvements in binutils Jenkins jobs, to track regressions rather than always report 'failed' * Benchmarking: - polishing scripts * GCC: * misc (conf-calls, meetings, emails, ....) == Next == * Benchmarking scripts * GCC: rebase old patches and re-benchmark

7 years, 6 months

[ACTIVITY] Week 21

by Yvan Roux

* Two days off (4/10) == Progress == o Linaro GCC/Validation (5/10) * Deployed 6.3 and 5,4 2017.05 releases (source and binaries) * Updated components for 7.1 2017.05 release candidate * Finishing release notes before deployment o Misc (1/10) * Various meetings and discussions. == Plan == o Deploy 7.1-rc1 and prepare release o Upstream monitoring reporting o Back on compiler development

7 years, 6 months

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