CODEWITHSUNDEEP
cmake
Bilal Ahmad
Bilal Ahmad

Reputation: 332

Error in compilation and Linking using CMake with Gcov

Im getting the following errors during compilation and linking while using gcov to get coverage information 

error: undefined reference to '__gcov_merge_add'
error: undefined reference to '__gcov_init'

Im passing flags to the CMakeLists.txt like this:

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

Do I have to add any thing else to the CMakeLists.txt?

Upvotes: 4

Views: 4327

Answers (2)

aggsol
aggsol

Reputation: 2480

Set the compiler flags

add_compile_options(-g -O0 -fprofile-arcs -ftest-coverage)

Link to lgcov

target_link_libraries(
    <target-name>
    gcov
)

Or use a CMake module

Upvotes: 5

Fraser
Fraser

Reputation: 78330

Assuming you only want coverage for Debug builds, your flags should be:

set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g -O0 -fprofile-arcs -ftest-coverage")
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -g -O0 -fprofile-arcs -ftest-coverage")
set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} -fprofile-arcs -ftest-coverage")

For further info, see http://cmake.org/Wiki/CTest/Coverage and http://cmake.org/Wiki/CTest/Coverage/Example

Upvotes: 0

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