Add coveralls support (#5)

* Add coveralls support

.travis.yml

@@ -5,16 +5,32 @@ dist: trusty
 sudo: required
 group: edge
 
-before_script:
+
+script:
   - mkdir build
   - cd build
-  - cmake ..
-
-script: make && make test
+  - cmake .. ${CMAKE_OPTIONS}
+  - make
+  - make test
 
 matrix:
   include:
 
+  - os: linux
+    compiler: gcc
+    addons:
+      apt:
+        sources: ['ubuntu-toolchain-r-test']
+        packages: ['check', 'g++-4.9']
+    before_script:
+      - pip install --user cpp-coveralls
+    after_success:
+      - make coverage
+      - coveralls --build-root test --include src --gcov 'gcov-4.9' --gcov-options '\-lp'
+    env:
+      - COMPILER=g++-4.9
+      - CMAKE_OPTIONS=-DENABLE_COVERAGE=ON
+
   # Linux / GCC
   - os: linux
     compiler: gcc

CMakeLists.txt

@@ -119,4 +119,7 @@ if (NOT ${DISABLE_TESTS})
 	add_coverage(acf)
 	add_subdirectory(test)
 	coverage_evaluate()
+    add_custom_target(coverage
+        make && make test && make gcov && make lcov
+    )
 endif()