Merge pull request #564 from sherlockflight/travis

Use 4.8 series GCC compiler for Travis build tests

.travis.yml

@@ -17,10 +17,16 @@ env:
 # We use cpp for unit tests, and c for the main project.
 language: cpp
 compiler: clang
+
 before_install: 
- - sudo add-apt-repository -y ppa:terry.guo/gcc-arm-embedded
- - sudo apt-get update
-install: sudo apt-get install build-essential gcc-arm-none-eabi=4.* git
+  - sudo apt-get update
+  - wget "https://launchpad.net/gcc-arm-embedded/4.8/4.8-2014-q3-update/+download/gcc-arm-none-eabi-4_8-2014q3-20140805-linux.tar.bz2"
+
+install: 
+  - sudo apt-get install build-essential git libc6-i386
+  - tar -xf gcc-arm-none-eabi-4_8-2014q3-20140805-linux.tar.bz2
+  - export PATH=$PATH:$PWD/gcc-arm-none-eabi-4_8-2014q3/bin
+   
 before_script: arm-none-eabi-gcc --version
 script: ./.travis.sh