Release notes for
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GNU Tools for Arm Embedded Processors 7
                               - Q2 2018
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This release includes the following items:
* Bare metal EABI pre-built binaries for running on a Windows host
* Bare metal EABI pre-built binaries for running on a Linux host
* Bare metal EABI pre-built binaries for running on a Mac OS X host
* Source code package (together with build scripts and instructions to setup
  build environment), composed of:

  * gcc : ARM/embedded-7-branch revision 261907
    svn://gcc.gnu.org/svn/gcc/branches/ARM/embedded-7-branch/

  * binutils : 2.30 mainline
    git://sourceware.org/git/binutils-gdb.git commit 763e359efaba5cc088604e3f3e1dda40fda06831

  * newlib and newlib-nano :
    git://sourceware.org/git/newlib-cygwin.git commit 3ccfb407af410ba7e54ea0da11ae1e40b554a6f4

  * gdb : 8.1 mainline
    git://sourceware.org/git/binutils-gdb.git commit b8839e82459280eb05d7841c0acd67b46f2cbf49

Note that some or all of the following prerequisites are downloaded when
building from source:

  * EnvVarUpdate NSIS script :
    http://nsis.sourceforge.net/mediawiki/images/a/ad/EnvVarUpdate.7z

  * expat 2.1.1 :
    http://jaist.dl.sourceforge.net/project/expat/expat/2.1.1/expat-2.1.1.tar.bz2

  * gmp 6.1.0 : ftp://gcc.gnu.org/pub/gcc/infrastructure/gmp-6.1.0.tar.bz2

  * isl 0.15 : ftp://gcc.gnu.org/pub/gcc/infrastructure/isl-0.15.tar.bz2

  * libelf 0.8.13 : http://www.mr511.de/software/libelf-0.8.13.tar.gz

  * libiconv 1.14 :
    http://ftp.gnu.org/gnu/libiconv/libiconv-1.14.tar.gz

  * mpc 1.0.3 : ftp://gcc.gnu.org/pub/gcc/infrastructure/mpc-1.0.3.tar.gz

  * mpfr 3.1.4 : ftp://gcc.gnu.org/pub/gcc/infrastructure/mpfr-3.1.4.tar.bz2

  * python 2.7.13 : https://www.python.org/ftp/python/2.7.13/python-2.7.13.msi

  * zlib 1.2.8
    http://sourceforge.net/projects/libpng/files/zlib/1.2.8/zlib-1.2.8.tar.gz/download

Minimum host requirements:
* Windows 7 32/64 bits or later (with installer and alternative zip package)
* Linux
  - Ubuntu 14.04 64 bits or later (tarball)
  - Ubuntu supported releases 32 bits and 64 bits (PPA)
    https://www.ubuntu.com/info/release-end-of-life
  - RHEL 7 64 bits (tarball)
* Mac OS X 10.7.3 and newer 64 bits (tarball)

Supported target OS:
* Bare metal EABI only

Features:
* All GCC 7 features, plus latest mainline features:
  + Armv8-R and Arm Cortex-R52 support

Tests:
* Targets
  + variety of Cortex-M0/M0+/M3/M4/M7/A9 boards
  + Qemu
  + Arm Fast Models
* Hosts
  + Windows 7 32/64 bits (with installer and alternative zip package)
  + Linux 64 bits
    - Ubuntu 14.04 and 16.04 (tarball and PPA)
    - RHEL 7 (tarball)
  + Mac OS X 10.7.3 (tarball)

Important changes in 7-2017Q4 major release:
* Armv8-R and Arm Cortex-R52 support
* Fix for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69866
* GDB built with C++ enabled for Mac OS X
* Fixed LTO bug
  https://bugs.launchpad.net/gcc-arm-embedded/+bug/1747966

Important changes in 7-2018Q2 update release:
* Fixed powf/expf/exp2f/logf/log2f performance regression
  https://answers.launchpad.net/gcc-arm-embedded/+question/662462
* Added support for Arm Cortex-M33 without DSP via -mcpu=cortex-m33+nodsp
* Added Armv8-R multilib mappings
* Fix build requirements for GDB tui support
* Enabled C99 IO format specifier in newlib
* Fixed cmse_nonsecure_caller Armv8-M Security Extension intrinsic
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85203
* Fix crash in __builtin_arm_set_fpscr GCC builtin
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85261
* LTO bug https://bugs.launchpad.net/gcc-arm-embedded/+bug/1747966
  was fixed in previous release. Release note updated to reflect the change.
* Fixed issue with building libgcc's cmse.c without headers
  https://bugs.launchpad.net/gcc-arm-embedded/+bug/1717502
* Fixed issue with arm_cmse.h C99 compatibility
  https://bugs.launchpad.net/gcc-arm-embedded/+bug/1773934

Known Changes and Issues:
* Thumb1 code size regression due to new register allocation:
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59535
* Multilib is now enabled with --with-multilib-list=rmprofile when building the
  toolchain from source
* Windows installer now accepts the following options when running in silent mode:
  - /P Adds the installation bin directory to the system PATH
  - /R Adds an InstallFolder registry entry for the install.