another attempt at gcc-4.9

.travis.yml

@@ -24,8 +24,10 @@ cache:
 addons:
   apt:
     sources:
+    - ubuntu-toolchain-r-test
     - boost-latest
     packages:
+    - g++-4.9
     - libboost1.55-all-dev
     - python2.7-dev
 
@@ -33,12 +35,12 @@ before_install:
   - git submodule update --init --recursive
 
 install:
-  - 'echo "using gcc : : ccache g++-4.8 : <cxxflags>-std=c++11 ;" > ~/user-config.jam'
+  - 'echo "using gcc : : ccache g++-4.9 : <cxxflags>-std=c++11 ;" > ~/user-config.jam'
   - 'echo "using clang : : ccache clang++ : <cxxflags>-std=c++11 ;" >> ~/user-config.jam'
   - 'echo "using python : 2.7 ;" >> ~/user-config.jam'
   - ccache -V && ccache --show-stats && ccache --zero-stats
-  - which $CXX-4.8
-  - ls -la `which $CXX-4.8`
+  - which $CXX-4.9
+  - ls -la `which $CXX-4.9`
 
 script:
   - cd test