Code Coverage with gcc

Gcov is code coverage tool from the gnu compiler suite.

To use gcov we have to set the following compiler and linker flags (CMAKE):

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs -ftest-coverage")
set(CMAKE_EXE_LINKER_FLAGS="-fprofile-arcs -ftest-coverage")

After compiling you have to run the program and then call:

gcov sourcex.cpp.o

This creates a logfile called sourcefile.gcov.

Create HTML files of the coverage data:
lcov --directory . --capture --output-file app.info

Generate a HTML view:
genhtml app.info