attempt to get GCC 5 in travis (#744)

use GCC 5 in travis

.travis.yml

@@ -36,7 +36,7 @@ addons:
     - libboost1.55-all-dev
     - libboost1.55-tools-dev
     - python2.7-dev
-    - g++-4.8
+    - g++-5
     - cppcheck
 
 before_install:
@@ -65,9 +65,12 @@ before_install:
 
 install:
 
-  - g++-4.8 --version
-  - 'echo "using gcc : : ccache g++-4.8 : <cflags>-std=c11 <cxxflags>-std=c++11 ;" > ~/user-config.jam'
-  - 'echo "using gcc : coverage : ccache g++-4.8 : <cflags>-std=c11 <cxxflags>-std=c++11 <compileflags>--coverage <linkflags>--coverage ;" >> ~/user-config.jam'
+  - touch ~/user-config.jam
+  - if [[ $TRAVIS_OS_NAME == "linux" ]]; then g++-5 --version; fi
+  - 'if [[ $TRAVIS_OS_NAME == "linux" ]]; then
+      echo "using gcc : : ccache g++-5 : <cflags>-std=c11 <cxxflags>-std=c++11 ;" >> ~/user-config.jam;
+      echo "using gcc : coverage : ccache g++-5 : <cflags>-std=c11 <cxxflags>-std=c++11 <compileflags>--coverage <linkflags>--coverage ;" >> ~/user-config.jam;
+    fi'
 
 # osx builds need to disable the deprecated warning because of the openssl
 # shipping with the system having marked all functions as deprecated. Since
@@ -92,7 +95,7 @@ script:
   - 'if [ "$variant" != "" ]; then
       bjam -j3 warnings-as-errors=on variant=$variant -l900 $toolset $target &&
       if [[ $TRAVIS_OS_NAME == "linux" && "$coverage" == "1" ]]; then
-        codecov --root .. --gcov-exec gcov-4.8;
+        codecov --root .. --gcov-exec gcov-5;
       fi;
     fi'
 

bindings/python/src/converters.cpp

@@ -101,7 +101,7 @@ struct vector_to_list
     static PyObject* convert(const std::vector<T>& v)
     {
         list l;
-        for (int i = 0; i < v.size(); ++i)
+        for (int i = 0; i < int(v.size()); ++i)
         {
            l.append(v[i]);
         }