[CMake] Problems with coverage on OS X Server

[David Cole]

Well, I've had mixed results trying this myself.

With the trivial SmallAndFast project, I get a good coverage
measurement on 5 lines of code in 1 source file:
http://my.cdash.org/viewCoverage.php?buildid=313323&status=3

With CMake itself, I get a bunch of *.gcda files generated in the
build tree, but the coverage info does not get communicated properly
via a ctest script sending to CDash. Looks like there's some issue
with ctest parsing of the gcov output using ctest 2.8.7 and clang on
the Mac and gcov 4.2.1:

$ gcov --version
gcov (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00)

Looks like there's a problem somebody will have to fix before it will
work. Unfortunately, the gcov parsing code in ctest is a bit of a
tangle -- last time I was in there, I fixed some stuff up to work in a
MinGW environment, and it's not pretty. Also unfortunately, I don't
think I'll have the bandwidth to look at this myself in the near
future: anybody want to volunteer to take a look and submit a patch to
get this working...?


Thx,
David


On Sat, Mar 24, 2012 at 8:53 AM, David Cole <david.cole at kitware.com> wrote:
> The answer to that stackoverflow question recommends using
> clang/clang++ instead. (I have not tried this yet myself, but would
> not be entirely surprised to find out it's correct. I have observed
> the zero coverage phenomenon on my own Mac laptop, but have sufficient
> coverage capabilities elsewhere... so I didn't care enough to follow
> up on it previously.)
>
>
> HTH,
> David
>
>
>
> On Sat, Mar 24, 2012 at 8:51 AM, David Cole <david.cole at kitware.com> wrote:
>> Perhaps it's because of this problem with the Mac "gcc" which is not
>> *really* just gcc anymore, and apparently doesn't support gcov
>> transparently as it should...
>>
>>  http://stackoverflow.com/questions/7988355/getting-0-gcov-coverage-for-a-mac-app
>>
>>
>> On Sat, Mar 24, 2012 at 7:45 AM,  <norulez at me.com> wrote:
>>> Hello,
>>>
>>> I have the following code in the main CTestScript.cmake which I call with
>>> "ctest -S CTestScript.cmake, Continuous":
>>>
>>>     SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -O0 -Wall -W
>>> -Wunused-variable -Wunused-parameter -Wunused-function -Wunused
>>> -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings
>>> -fprofile-arcs -ftest-coverage")
>>>     SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -O0 -Wall -W -fprofile-arcs
>>> -ftest-coverage")
>>>     SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs
>>> -ftest-coverage")
>>>     SET(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS}
>>> -fprofile-arcs -ftest-coverage")
>>>     SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}
>>> -fprofile-arcs -ftest-coverage")
>>>
>>>     FILE(WRITE "${CTEST_BINARY_DIRECTORY}/CMakeCache.txt" "
>>>          CMAKE_CXX_FLAGS:STRING=@CMAKE_CXX_FLAGS@
>>>          CMAKE_C_FLAGS:STRING=@CMAKE_C_FLAGS@
>>>          CMAKE_EXE_LINKER_FLAGS:STRING=@CMAKE_EXE_LINKER_FLAGS@
>>>          CMAKE_MODULE_LINKER_FLAGS:STRING=@CMAKE_MODULE_LINKER_FLAGS@
>>>          CMAKE_SHARED_LINKER_FLAGS:STRING=@CMAKE_SHARED_LINKER_FLAGS@
>>>          ")
>>>
>>>
>>>     ## -- Configure
>>>     message (" -- Configure ${MODEL} - ${CTEST_BUILD_NAME} --")
>>>     ctest_configure (BUILD "${CTEST_BINARY_DIRECTORY}")
>>>
>>>
>>>
>>> On Windows XP and on Ubuntu Linux Server 11.10 it works and I get coverage
>>> information.
>>>
>>> But on OS X Lion Server I didn't get any coverage informations.
>>>
>>> On OS X the command gcov is available.
>>>
>>>
>>> Could someone please help?
>>>
>>>
>>> Thanks in advance
>>>
>>>
>>> Best Regards
>>>
>>> NoRulez
>>>
>>>
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