GNU Arm Embedded Toolchain 6-2017-q1-update

6 update 1 release.

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GNU Arm Embedded Toolchain
Prakhar Bahuguna
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1 Thomas Preud'homme
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2 Fix Released

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Release notes 

The 6 2017q1 update release is available at:


IMPORTANT NOTICE: As previously announced we are no longer releasing the binary packages of this toolchain on Launchpad, please see the link for above.

New Features

* All GCC 6 features, plus latest mainline features:
  + Full ARMv8-M support including atomics and Security Extensions
  + ARM PURECODE support for ARMv7-M and ARMv8-M Mainline
  + Co-processor intrinsics support
  + Cortex-M23 and Cortex-M33 support
  + -mthumb optional for Cortex-M devices
* Support for OS-retargeting of locking routines in newlib

Important bugs fixed in 6 major release:

* Fix redundant load in loop
* Fixed stack corruption when using high registers and LR register
* Fixed internal compiler error when compiling empty FIQ interrupt handler
* Fix internal compiler error with LTO when building g++.dg/lto/20081219 testcase
* Fixed callee-saved register trashing when clobbering SP register
* Fixed internal compiler error when using -mslow-flash-data and floating-point
* Fixed wrong code generation with indirect sibbling calls
* Fixed spurious code removal

Important bugs fixed in 6 update 1 release:

* Fix Mac GDB crash with invalid commands
* Fix Windows wildcard support
* Fix selection of newlib.h variant with nano.specs and g++
* Allow VCMP immediate without prefix in unified syntax

Known Changes and Issues

* Thumb1 code size regression due to new register allocation:
* Multilib is now enabled with --with-multilib-list=rmprofile when building the
  toolchain from source


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0 blueprints and 2 bugs targeted

Bug report Importance Assignee Status
1641333 #1641333 .syntax unified - VCMP immediate still requires # 1 Undecided   10 Fix Released
1661882 #1661882 arm-none-eabi-g++ pulls the wrong version of newlib.h if -specs=nano.specs selected 1 Undecided Thomas Preud'homme  10 Fix Released
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