Enable coverage reports for Travis builds

Changes required:
- switch Travis builds to gcc, using O0 for build speed
- enable a debug build
- enable coverage report for ctest on Travis (sent to dash)

.travis.yml

@@ -1,7 +1,7 @@
 language: cpp
 
 compiler:
-  - clang
+  - gcc
 
 cache: apt
 
@@ -18,7 +18,7 @@ before_install:
 install:
   - mkdir build
   - cd build
-  - cmake -DWITH_SERVER=ON -DWITH_STAGED_PLUGINS=OFF -DWITH_GRASS=OFF \
+  - cmake -DWITH_SERVER=ON -DWITH_STAGED_PLUGINS=OFF -DWITH_GRASS=OFF -DENABLE_COVERAGE=ON.. \
           -DSUPPRESS_QT_WARNINGS=ON -DENABLE_MODELTEST=ON -DWITH_QWTPOLAR=OFF ..
 
 script: xvfb-run ctest -V -E 'Atlas|atlas|PyQgsPalLabelingCanvas|PyQgsPalLabelingServer|qgis_wcsprovidertest' -S ../qgis-test-travis.ctest --output-on-failure

CMakeLists.txt

@@ -414,11 +414,11 @@ ENDIF(MSVC)
 
 IF(ENABLE_COVERAGE)
   INCLUDE("cmake/modules/coverage/CodeCoverage.cmake")
-  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage")
-  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage")
-  SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage")
-  SET(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage")
-  SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage")
+  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage --coverage")
+  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage --coverage")
+  SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage --coverage")
+  SET(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage --coverage")
+  SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage --coverage")
   SETUP_TARGET_FOR_COVERAGE(qgis_coverage ctest coverage)
 ENDIF(ENABLE_COVERAGE)
 

qgis-test-travis.ctest

@@ -7,15 +7,21 @@ SET( CTEST_CMAKE_GENERATOR  "Unix Makefiles" )
 SET (CTEST_CMAKE_COMMAND "cmake" )
 SET (CTEST_BUILD_COMMAND "/usr/bin/make -j2 -i -k" )
 SET (CTEST_SITE "travis-ci.org" )
+SET (CTEST_COVERAGE_COMMAND "/usr/bin/gcov" )
+SET (CTEST_CUSTOM_COVERAGE_EXCLUDE "\(.*/tests/.*|.*\\.cxx|.*\\.sip|.*/sip_.*|.*/ui_.*|.*/qwtpolar.*\)\$" )
 IF ($ENV{TRAVIS_PULL_REQUEST} STREQUAL "false")
   # No pull request
   SET (CTEST_BUILD_NAME "$ENV{TRAVIS_BRANCH} ($ENV{TRAVIS_COMMIT})")
 ELSE()
   SET (CTEST_BUILD_NAME "PR: $ENV{TRAVIS_PULL_REQUEST} / $ENV{TRAVIS_BRANCH} ($ENV{TRAVIS_COMMIT})")
 ENDIF()
-SET (CTEST_BUILD_CONFIGURATION "Release")
-
+SET (CTEST_BUILD_CONFIGURATION "Debug")
 
+SET(CMAKE_CXX_FLAGS_COVERAGE "-g -O0 --coverage -fprofile-arcs -ftest-coverage" )
+SET(CMAKE_C_FLAGS_COVERAGE "-g -O0 --coverage -fprofile-arcs -ftest-coverage")
+SET(CMAKE_EXE_LINKER_FLAGS_COVERAGE "--coverage -fprofile-arcs -ftest-coverage")
+SET(CMAKE_SHARED_LINKER_FLAGS_COVERAGE "--coverage -fprofile-arcs -ftest-coverage" )
+
 SET (INITIAL_CACHE "
 BUILDNAME:STRING=${CTEST_BUILD_NAME}
 SITE:STRING=${CTEST_SITE}
@@ -36,6 +42,7 @@ IF(NOT ${BUILDRES} EQUAL 0)
   MESSAGE( FATAL_ERROR "Build failed." )
 ENDIF(NOT ${BUILDRES} EQUAL 0)
 ctest_test (BUILD "${CTEST_BINARY_DIRECTORY}" PARALLEL_LEVEL 2 RETURN_VALUE TESTRES)
+ctest_coverage( BUILD "${CMAKE_BINARY_DIR}")
 IF(NOT ${TESTRES} EQUAL 0)
   ctest_submit ()
   MESSAGE( FATAL_ERROR "Test failed." )