GNU ARM Embedded Toolchain 5-2016-q1-update

Update 5 in Q1 2016

Milestone information

Project:
GNU ARM Embedded Toolchain
Series:
5.0
Version:
5-2016-q1-update
Released:
2016-04-04  
Registrant:
Andre Vieira
Release registered:
2016-04-04
Active:
No. Drivers cannot target bugs and blueprints to this milestone.  

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Release notes 

The 5 2016q1 update release is available at:

* https://launchpad.net/gcc-arm-embedded/5.0/5-2016-q1-update
* https://launchpad.net/~team-gcc-arm-embedded/+archive/ubuntu/ppa

Features:
* All GCC 5 features, plus latest mainline features:
  + Cortex-R8 support
  + Cortex-M7 performance tuning
  + optimization of manual little endian and big endian loads
  + improved jump threading removing the need for -ftree-switch-shortcut
* ARMv8-M Baseline and Mainline alpha support:
  + atomics not included for ARMv8-M Baseline
  + ARMv8-M Security Extensions Alpha support
* Thumb-1 library optimizations
  + https://gcc.gnu.org/ml/gcc-patches/2015-10/msg01282.html
* CRC optimization
  + https://gcc.gnu.org/ml/gcc-patches/2015-11/msg02046.html
* Smaller terminate handler for newlib-nano

Important bugs fixed in 5 release:
* https://answers.launchpad.net/gcc-arm-embedded/+question/267037
* https://bugs.launchpad.net/gcc-arm-embedded/+bug/1534360
* https://answers.launchpad.net/gcc-arm-embedded/+question/286502
* A bug that caused gdb's target remote command to behave unexpectedly when
  debugging simple programs

Known Changes and Issues:
* Thumb1 code size regression due to new register allocation:
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61578
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59535
A workaround is to disable it by option -mno-lra.

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