GNU Arm Embedded Toolchain 4.7-2012-q4-major

The first 4.7 release

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GNU Arm Embedded Toolchain
Terry Guo
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download icon gcc-arm-none-eabi-4_7-2012q4-20121208-win32.exe (md5) Windows installer 53,360
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download icon gcc-arm-none-eabi-4_7-2012q4-20121208-linux.tar.bz2 (md5) Linux installation tarball 22,120
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download icon How-to-build-toolchain.pdf (md5) How to build 8,806
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Release notes 

GNU Tools for ARM Embedded Processors 4.7
                               - Dec 2012

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-4_7-branch revision 194305

  * binutils : 2.22 with mainline backports
    git:// commit 8f0e6ebede51788f429937646e891633a20dc533

  * newlib : 1.19 with mainline backports

  * gdb : 7.4.1 with mainline backports, without target sim support
    git:// commit 263dc2d4afef8873f4262257f372af9fade55d94

  * cloog-ppl 0.15.11 :

  * expat 2.0.1 :

  * gmp 4.3.2 :

  * libelf 0.8.13 :

  * libiconv 1.11.1 :

  * mpc 0.8.1 :

  * mpfr 2.4.2 :

  * ppl 0.11 :

  * zlib 1.2.5 with makefile patch :

  * newlib-nano 1.0 : Included in source package

Supported hosts:
* Windows XP/7 32/64 bits (with installer)
* Linux 32/64 bits (tarball)
  - Ubuntu 8.x or later
  - RHEL 4/5
* Mac OS X 64 bits (tarball)

Supported target OS:
* Bare metal EABI only

* All GCC 4.7 features, plus latest mainline features
  - Defaultly turn on option -munaligned-access for ARM
  - Support for more features from C11 revision of ISO C
  - Support various new GNU extensions to the DWARF
* Additional code size optimizations
* Cortex-M0+ support
* Newlib-nano: newlib branch optimized for code size
* GDB support of unwind from exception handler
* GDB support of FP registers in Cortex-M4

* Tested on a variety of Cortex-M0/M0+/M3/M4 boards
* Tested on Qemu

Known issues in 4.7 major 2012.12 release:
* Comparing to 4.6, GCC 4.7 tends to inline more function calls when
  optimizing for speed (O2/O3). So program built from 4.7 with O2/O3
  might be slightly bigger than 4.6, but usually with performance gain.
  To fall back closer to 4.6 behavior, please include compiler option:
  --param early-inlining-insns=10


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