# Progress #
TCWG-845 Static linking missing linker defined symbols
- Now upstream
TCWG-829 Support for ifunc
- Patch sent upstream for review, no feedback yet. This is a bit messy
as ARM is different to other architectures so I expect this to need
reworking several times.
TCWG-828 Static linking and TLS
- Downstream patch implemented and tested, will send upstream after ifunc
TCWG-683 Support for branches to undefined weak references
- Downstream patch implemented and tested
Other:
- Downloaded and built Mozilla and Chromium so I can use them as
performance tests for lld (initially for x86_64).
- Wrote some scripts to make using lld in place of gnu ld a bit more convenient.
# Plan #
- Upstream static linking changes
- Work some infrastructure to test lld more widely on ARM.
o 2 days off (4/10)
== Progress ==
o Linaro GCC/Validation (4/10)
* Completed GCC 5 and 6 branch merges
* Released source 2016.10 snapshots
o Upstream GCC (1/10)
* Investigate PR #78020 (vzip, vuzp implementation).
o Misc (1/10)
* Various meetings and discussions.
== Plan ==
o Two more days off
o Back on 4.9 branch merge and validation.
The Linaro Binary Toolchain
============================
The Linaro GCC 6.2-2016.11-rc1 Release-Candidate 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-candidate packages from:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.2-2016.11-rc1/http://snapshots.linaro.org/components/toolchain/binaries/6.2-2016.11-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/
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 6.2-2016.11-rc1
Linaro glibc 2.23 (linaro/2.23/master)
https://www.sourceware.org/ml/libc-alpha/2016-08/msg00212.html
Linaro newlib 2.4-2016.03 (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…
Linaro GDB 7.12 (gdb-7.12-branch)
https://sourceware.org/ml/gdb/2016-08/msg00000.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 6.2-2016.11-rc1
====================================
* The Linaro GCC 6.2-2016.10 snapshot added AArch32 support for ARMv8.2
and ARMv8m, as well as some AArch64 fixes for ARMv8.2, and bug fixes
merged from FSF GCC 6.2.
* Basic tuning support for the Qualcomm qdf24xx was added to the Linaro
GCC 6.2-2016.10 snapshot and will appear in this release.
* IFUNC was disabled for baremetal targets, as it was causing test-suite
failures, and is presently a Linux only feature.
* The gold linker was also added to this binary releases (for linux
targets).
* Backported malloc_lock fix into Linaro newlib 2.4.
commit 022bd2995640626d9efb6a839884c5e1c7c5e133
Author: Christophe Lyon <christophe.lyon(a)linaro.org>
Date: Wed Oct 19 14:11:50 2016 +0200
Re-enable malloc_lock for newlib-nano
* Backported rawmemchr patch into Linaro newlib 2.4.
commit 5357441171f2409fb759112bc6a00d3e672374d9
Author: Christophe Lyon <christophe.lyon(a)linaro.org>
Date: Wed Oct 19 14:09:51 2016 +0200
Add rawmemchr
* Backported strlen fix when using Thumb-2 and -Os -marm into Linaro
newlib 2.4.
commit f194ff4d5e1e304ac2a8d438d7abcbffd2dba757
Author: Christophe Lyon <christophe.lyon(a)linaro.org>
Date: Wed Oct 19 14:05:23 2016 +0200
Fix strlen using Thumb-2 with -Os -marm
* Backported fix for semihosting ARM when heapinfo not provided by
debugger into Linaro newlib 2.4.
commit bda499cb9d2b97075f74df9bfb38b23ff4d12ac2
Author: Christophe Lyon <christophe.lyon(a)linaro.org>
Date: Wed Oct 19 13:59:52 2016 +0200
Fixed semihosting for ARM when heapinfo not provided by debugger.
* Merged latest FSF glibc release/2.23/master into Linaro glibc 2.23.
* Added __ASSUME_REQUEUE_PI support to Linaro glibc 2.23 branch.
commit 2d20c3bf918cd94ebd4106693adb3a5c9272baba
Author: Adhemerval Zanella <adhemerval.zanella(a)linaro.org>
Date: Tue May 17 10:16:39 2016 -0300
Add runtime check for __ASSUME_REQUEUE_PI (BZ# 18463)
* Added __ASSUME_SET_ROBUST_LIST support to Linaro glibc 2.23 branch.
commit bb8f09d72756186a3d82a1f7b2adcf8bc1fbaed1
Author: Adhemerval Zanella <adhemerval.zanella(a)linaro.org>
Date: Mon May 16 19:01:10 2016 -0300
Remove __ASSUME_SET_ROBUST_LIST
* Added __ASSUME_FUTEX_LOCK_PI support to Linaro glibc 2.23 branch.
commit e48b4e7fed0de06dd7832ead48bea8ebc813a204
Author: Adhemerval Zanella <adhemerval.zanella(a)linaro.org>
Date: Mon May 16 10:35:25 2016 -0300
Remove __ASSUME_FUTEX_LOCK_PI
* Merged latest FSF binutils-2_27-branch into
linaro_binutils-2_27-branch.
* 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, Linaro GCC
6.1-2016.07, Linaro GCC 6.1-2016.08, Linaro GCC 6.2-2016.09, and
Linaro GCC 6.2-2016.10 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/http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.1-2016.08/http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.2-2016.09/http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.2-2016.10/
Contact Linaro
===============
File bugs at http://bugs.linaro.org
For Linaro member support see http://support.linaro.org
--
Ryan S. Arnold | Linaro Toolchain Engineering Manager
ryan.arnold(a)linaro.org | ryanarn on #linaro-tcwg @ freenode.irc.net
== Progress ==
LTO/IPA
- Committed propagation of nonnull attribute and optimizations
- Committed patch to infer noonull from ADDR_EXPR
- Working on a patch to improve ipa-cp unary expressions pass
through jump-function
* LTO bootstrap is failing in streaming but normal bootstrap working
* Looking into it
== Next ==
- Commit pending patches
- Start LTO benchmarking and analysis
== This Week ==
* TCWG-72 (2/10)
- Updated patch based on Jeff's suggestions.
* Folding optimizations (2/10)
a) PR53979 - fix committed to trunk
b) PR71636 - fix committed to trunk
* TCWG-665 (2/10)
- Rebased patch and done few modifications
- Trying to look for a better solution to workaround a memory leak
issue with patch
with -ffat-lto-objects
* PR35503 (1/10)
- Rebased patch on top of Marek's changes to c-common.c and pinged upstream.
* Validation (1/10)
- Added spec2k and spec2k6 to tcwg-buildapp
- Fixed abe bug 1439
* Misc (2/10)
- Reading up on mod/ref analysis.
- Meetings
== Next Week ==
- TCWG-72, TCWG-665, TCWG-125
- Look into changing user to "benchmark" for tcwg-buildapp job.
== Progress ==
TCWG-610 ARM Exceptions support
Now fully committed upstream. We should now have support for
exceptions in Shared Objects and Executables.
I've diagnosed problems when static linking after staring at a
disassembly for most of a day. With some hacks I've managed to get a
static link working using a recent Linaro sysroot. Next task is to
resolve these in a more principled way.
TCWG-845 Static linking missing linker defined symbols
- lld doesn't use a built in linker script so we need to add in
symbols that libc.a is expecting the default linker script to
generate.
- lld is defining __tls_get_addr as it expects all TLS to be relaxed,
this isn't the case for ARM or Mips so we need to not define it.
TCWG-829 Support for ifunc
For some annoying reason that I can't work out why, ARM requires the
R_ARM_IRELATIVE relocations to be in the .rel.dyn and not .rel.plt
like all the other targets that lld supports including AArch64
TCWG-828 Static linking and TLS
When static linking the TLS dynamic relocations in the .got must be
resolved statically.
- The other architectures that lld supports have the thread control
block (tcb) after the data so the initial-exec relocations don't need
to add the tcb size to the value put into the .got.
- The module index dynamic relocation needs to be 1 and not 0 (LLD
assumes general dynamic is relaxed away at static link-time).
TCWG-683 Support for branches to undefined weak references
LLD doesn't resolve these to the next instruction so they just hang at runtime.
Some feedback and review for Linaro LLVM team processes.
== Plans ==
Work out a proper solution for TCWG-828 then start upstreaming.
TCWG-683 can be worked around by providing an empty definition of the
function, all the others need to be fixed to get a static libc to
link.
# Progress #
* TCWG-333, Fix gdb.base/func-ptrs.exp fails in thumb mode. [4/10]
Get review comments and suggestions. Tried to do what they suggested,
but it doesn't work well due to some reasons. Preparing the the reply to
address their comments.
* TCWG-416, Improve GDB performance in remote debugging. [2/10]
Patches for ARM and AArch64 are ready. Need to measure the
performance improvement.
* OpenOCD. [2/10]
Chat with people working on AArch64 support on irc. Help him
understanding GDB and GDB remote protocol. Patches are there, but
need to figure out how to help to get these patches merged.
* Misc, [2/10]
Meeting, and various discussions.
# Plan #
* Continue all above.
--
Yao Qi
The Linaro Toolchain Working Group (TCWG) is pleased to announce the
2016.10 snapshot of both Linaro GCC 5 and Linaro GCC 6 source
packages.
Linaro GCC 6 monthly snapshot[1] is based on FSF GCC 6.1+svn241214 and
includes performance improvements and bug fixes backported from
mainline GCC. This snapshot contents will be part of the 2016.11
stable[2] quarterly release.
This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.2-2016.10/
Interesting changes in this GCC source package snapshot include:
* Updates to GCC 6.2+svn241214
* Backport of [Bugfix] PR libgcc/77519: Correct libgcc complex
multiply excess precision handling
* Backport of [Bugfix] PR target/63250: Enable HCmode multiply and
divide (mulhc3/divhc3)
* Backport of [AArch32/AArch64] Add qdf24xx base tuning support
* Backport of [AArch32] [ARMv8.2] 1/17 Add ARMv8.2-A command line
option and profile
* Backport of [AArch32] [ARMv8.2] 2/17 [testsuite] Add a selector for
ARM FP16 alternative format support.
* Backport of [AArch32] [ARMv8.2] 3/17 [testsuite] Add ARM support for
ARMv8.2-A with FP16 arithmetic instructions
* Backport of [AArch32] [ARMv8.2] 4/17 Define feature macros for FP16
* Backport of [AArch32] [ARMv8.2] 5/17 Enable HI mode moves for
floating point values
* Backport of [AArch32] [ARMv8.2] 6/17 Add data processing intrinsics
for float16_t
* Backport of [AArch32] [ARMv8.2] 7/17 Add FP16 data movement instructions
* Backport of [AArch32] [ARMv8.2] 8/17 Add VFP FP16 arithmetic instructions
* Backport of [AArch32] [ARMv8.2] 9/17 Add NEON FP16 arithmetic instructions
* Backport of [AArch32] [ARMv8.2] 10/17 Refactor support code for NEON builtins
* Backport of [AArch32] [ARMv8.2] 11/17 Add builtins for VFP FP16 intrinsics
* Backport of [AArch32] [ARMv8.2] 12/17 Add builtins for NEON FP16 intrinsics
* Backport of [AArch32] [ARMv8.2] 13/17 Add VFP FP16 instrinsics
* Backport of [AArch32] [ARMv8.2] 14/17 Add NEON FP16 instrinsics
* Backport of [AArch32] [ARMv8.2] 15/17 Add tests for ARMv8.2-A FP16 support
* Backport of [AArch32] [ARMv8.2] 16/17 Add tests for VFP FP16 ACLE instrinsics
* Backport of [AArch32] [ARMv8.2] 17/17 Add tests for NEON FP16 ACLE intrinsics
* Backport of [AArch32] [ARMv8.2] Delete one redundant word in
target-supports.exp comment
* Backport of [AArch32] [ARMv8.2] Enable mov[hsd]i_movw tests on ARM
and big endian
* Backport of [AArch32] [ARMv8.2] Fix invalid instructions generated
for data movement.
* Backport of [AArch32] [ARMv8.2] Fix invalid instructions generated
for data movement.
* Backport of [AArch32] [ARMv8.2] Fix new constraints and attributes
of SI/HI data movement patterns
* Backport of [AArch32] [ARMv8-M] Add support for ARMv8-M
* Backport of [AArch32] [ARMv8-M] Add support for CB(N)Z and (U|S)DIV
to ARMv8-M Baseline
* Backport of [AArch32] [ARMv8-M] Add support for MOVT/MOVW to ARMv8-M Baseline
* Backport of [AArch32] [ARMv8-M] Check CLZ availability with ISA
support and architecture level macros
* Backport of [AArch32] [ARMv8-M] Enable atomics for ARMv8-M Mainline
* Backport of [AArch32] [ARMv8-M] Factor out MOVW/MOVT availability
and desirability checks
* Backport of [AArch32] [ARMv8-M] Fix indentation of FL_FOR_ARCH*
definition after adding support for ARMv8-M
* Backport of [AArch32] [ARMv8-M] Fix pr42574.c selector syntax error
* Backport of [AArch32] [ARMv8-M] Fix Thumb-1 only == ARMv6-M &
Thumb-2 only == ARMv7-M assumptions
* Backport of [AArch32] Fix RTL checking failure in Thumb mode
* Backport of [AArch64] Add __artificial__ attribute to Aarch64 NEON intrinsics
* Backport of [AArch64] Add missing attributes to arm_neon.h
* Backport of [AArch64] Add more NEON intrinsics vmaxnm_f64,
vminnm_f64, vmax_f64, vmin_f64
* Backport of [AArch64] Add tunning of ldpw for THunderX
* Backport of [AArch64] Fix __builtin_aarch64_fmindf
* Backport of [AArch64] [ARMv8.2] 1/4 ARMv8.2-A FP16 testsuite selector
* Backport of [AArch64] [ARMv8.2] 2/4 ARMv8.2-A testsuite for new data
movement intrinsics
* Backport of [AArch64] [ARMv8.2] 3/4 ARMv8.2-A testsuite for new
vector intrinsics
* Backport of [AArch64] [ARMv8.2] 4/4 ARMv8.2-A testsuite for new
scalar intrinsics
* Backport of [Misc] Allow simple register subregs in noce_convert_multiple_sets
* Backport of [Misc] Fix native_encode_real for HFmode constants
* Backport of [Misc] Modify extend_mask to extend bits based on signop
* Backport of [Testsuite] [AArch32] Fix prototype in vst1Q_laneu64-1.c
* Backport of [Testsuite] [AArch32] neon-testgen.ml removal
* Backport of [Cleanup] Fix typo in comment in tree-ssa-strlen.c
Linaro GCC 5 monthly snapshot[1] is based on FSF GCC 5.4+svn241215 and
includes performance improvements and bug fixes backported from
mainline GCC. This snapshot contents will be part of the 2016.11
maintenance release.
This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/5.4-2016.10/
Interesting changes in this GCC source package snapshot include:
* Updates to GCC 5.4+svn241215
Subscribe to the important Linaro mailing lists and join our IRC
channels to stay on top of Linaro development.
** Linaro Toolchain Development "mailing list":
http://lists.linaro.org/mailman/listinfo/linaro-toolchain
** Linaro Toolchain IRC channel on irc.freenode.net at @#linaro-tcwg@
* Bug reports should be filed in bugzilla against GCC product:
http://bugs.linaro.org/enter_bug.cgi?product=GCC
* Interested in commercial support? inquire at "Linaro support":
mailto:support@linaro.org
[1]. Source package snapshots are defined when the compiler is only
put through unit-testing and full validation is not performed.
[2]. Stable source package releases are defined as releases where the
full Linaro Toolchain validation plan is executed.
Hi all.
I've incorrectly reported a build failure in the support system.
<https://support.linaro.org/hc/en-us/requests/1876>
-But I'm posting a copy to this list, in order to follow Victor's advice.
I've suggested a couple of changes, which makes ABE a little more compatible.
Though I can still not build the toolchain on my PowerBook G4, I think that my two modifications might ease building on Intel based Macs and perhaps other architectures in addition.
In short:
* Use getconf instead of /proc/cpuinfo (you're already using getconf in configure.ac).
* By default use twice as many cores for -jN as usual. (If you have 2 cores, use -j4)
* Change the architecture from 'Power Macintosh' (which contains an offending space) to 'powerpc'.
...And here's "configure.ac.patch":
---8<-----8<-----8<-----
diff --git a/configure.ac b/configure.ac
index 1bf3593..8cc4986 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,9 +49,10 @@ AC_SUBST(DBPASSWD)
DBHOST=${dbhost}
AC_SUBST(DBHOST)
-CPUS="`grep -c proces /proc/cpuinfo`"
+
+let CPUS=2*`getconf _NPROCESSORS_ONLN`
AC_SUBST(CPUS)
-CORES="`grep cores /proc/cpuinfo | tail -1 | cut -d ' ' -f 3`"
+#CORES="`grep cores /proc/cpuinfo | tail -1 | cut -d ' ' -f 3`"
AC_SUBST(CORES)
LIBC="`getconf GNU_LIBC_VERSION`"
AC_SUBST(LIBC)
@@ -59,6 +60,7 @@ KERNEL="`uname -r`"
AC_SUBST(KERNEL)
BUILDHOST="`${srcdir}/config.guess`"
BUILD_ARCH="`uname -m`"
+[[ "`uname -s`" == "Darwin" ]] && BUILD_ARCH="`uname -p`"
AC_SUBST(BUILD_ARCH)
AC_SUBST(BUILDHOST)
HOSTNAME="`uname -n`"
--->8----->8----->8-----
Apart from that, I'd like to report a successful build on Cubieboard2 running Armbian.
I built for the aarch64 architecture, and I'm currently attempting to build Armbian for beelink GT1 using the new shiny Linaro toolchain. :)
...and what a pleasure, there's no fan-noise when building on the Cubieboard2!
Love
Jens
Just been trying to build the Linaro toolchain from source on RHEL 6.5. The ABE configure script fails to detect the packaging system on RHEL as it looks like RPM will only be detected if it's running on a Fedora system. This patch will instead detect RPM if the rpm binary is available (and it's not Debian/Ubuntu), like the test for Arch/pacman.
diff --git a/configure b/configure
index 42f787e..52ddd42 100755
--- a/configure
+++ b/configure
@@ -3639,7 +3639,6 @@ fi
# Figure out which packaging system is in use. Since it's possible to
# install both on a system.
-rpm="`uname -a | grep -ic '\.fc[0-9].\.'`"
deb="`uname -a | grep -ic 'ubuntu'`"
deb=$(($deb + `uname -a | grep -ic 'debian'`))
@@ -3672,7 +3671,9 @@ $as_echo "yes" >&6; }
### RPM Packages ###
else
-if test ${rpm} -eq 1; then
+rpm="`which rpm 2> /dev/null`"
+result=$?
+if test ${result} -eq 0; then
packages="${packages} ncurses-devel python-devel"
for i in ${packages}; do
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $i is installed" >
Regards,
Scott.
