[CMake] coverage using gcov failed

[Bill Hoffman]

On 4/25/2013 8:26 AM, Lloyd wrote:
> Hi,
>
> I am trying cmake in cygwin for code coverage analysis using gcov. My
> source code is arranged as follows
>
> CMakeLists.txt  src  tests
>
> ./src:
> CMakeLists.txt  lib  main.cpp
>
> ./src/lib:
> reverse
>
> ./src/lib/reverse:
> CMakeLists.txt  reverse.cpp  reverse.h
>
> ./tests:
> CMakeLists.txt  test_rev.cpp  test_runner.cpp
>
>
>
> My main make file is also given below
>
> #Root cmake file
> cmake_minimum_required (VERSION 2.6)
> PROJECT (Tutorial)
> SET (DO_TEST false CACHE BOOL "Enable Testing?")
> SET (DO_CODE_COVERAGE false CACHE BOOL "Enable Code coverage?")
>
> if(DO_CODE_COVERAGE)
> MESSAGE (STATUS "Code coverage is enabled")
> SET(CMAKE_CXX_FLAGS="-g -O0 -Wall -W -Wshadow -Wunused-variable
> -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers
> -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs
> -ftest-coverage")
> SET(CMAKE_C_FLAGS="-g -O0 -Wall -W -fprofile-arcs -ftest-coverage")
> SET(CMAKE_SHARED_LINKER_FLAGS="-fprofile-arcs -ftest-coverage")
> SET(CMAKE_EXE_LINKER_FLAGS="-fprofile-arcs -ftest-coverage")
> endif(DO_CODE_COVERAGE)
>
> ADD_SUBDIRECTORY(src/lib/reverse)
> ADD_SUBDIRECTORY(src)
>
> #Testing related code
> if(DO_TEST)
> MESSAGE (STATUS "Testing is enabled")
> ADD_SUBDIRECTORY(tests)
> #ENABLE_TESTING()
> include( CTest )
> ADD_TEST(NAME Test WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/src/Debug
> COMMAND test_rev)
> endif(DO_TEST)
>
>
> And the major portion of the cmake file of test executable is also given
> below.
>
>
> #Cmake file of Tests
> cmake_minimum_required (VERSION 2.6)
>
> SET(TST_SRC test_rev.cpp test_runner.cpp)
>
> FIND_PACKAGE(Boost REQUIRED COMPONENTS unit_test_framework)
>
> INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS})
> INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}../../src/lib/reverse)
> ADD_DEFINITIONS(-DBOOST_TEST_DYN_LINK)
> ADD_EXECUTABLE(test_rev ${TST_SRC})
> TARGET_LINK_LIBRARIES(test_rev ${Boost_LIBRARIES})
> TARGET_LINK_LIBRARIES(test_rev Reverse)
> if(DO_CODE_COVERAGE)
> MESSAGE("Yes code coverage in test")
> TARGET_LINK_LIBRARIES(test_rev gcov)
> endif(DO_CODE_COVERAGE)
>
> When I run, I get the following error
>
> $ make ExperimentalCoverage
>     Site: llvm
>     Build name: CYGWIN-c++.exe
> Performing coverage
>   Cannot find any coverage files. Ignoring Coverage request.
> Built target ExperimentalCoverage
>
> Why is the coverage files are not created?
>

I don't see any add_test calls.  So, you are not running any code, so 
there is no code covered.

-Bill