Re: [tarantool-patches] Re: [PATCH 1/1] Fix gcov on Mac

[Vladislav Shpilevoy <v.shpilevoy@tarantool.org>]

Thanks. Actually I do not care how gcov should be
enabled, so any solution is ok for me.

On 21/12/2018 12:58, Alexander Turenko wrote:
> I think we should check for __gcov_flush on Mac OS too, because it is in
> the libraries; for me in:
> 
> /Applications/Xcode83.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.profile_tvos.a
> /Applications/Xcode83.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.profile_tvossim.a
> 
> Don't sure which one is actually used.
> 
> But we should not add -lgcov (it assumed by -ftest-coverage on GCC, but
> not on clang).
> 
> This patch works for me on Mac OS (and should on Linux too):
> 
> diff --git a/cmake/profile.cmake b/cmake/profile.cmake
> index 02d622187..3e8f1499b 100644
> --- a/cmake/profile.cmake
> +++ b/cmake/profile.cmake
> @@ -1,4 +1,6 @@
> -check_library_exists (gcov __gcov_flush  ""  HAVE_GCOV)
> +set(CMAKE_REQUIRED_FLAGS "-fprofile-arcs -ftest-coverage")
> +check_library_exists("" __gcov_flush "" HAVE_GCOV)
> +set(CMAKE_REQUIRED_FLAGS "")
>   
>   set(ENABLE_GCOV_DEFAULT OFF)
>   option(ENABLE_GCOV "Enable integration with gcov, a code coverage program" ${ENABLE_GCOV_DEFAULT})
> 
> WBR, Alexander Turenko.
> 
> On Tue, Dec 18, 2018 at 01:11:08PM +0300, Vladimir Davydov wrote:
>> Alexander, please take a look.
>>
>> On Mon, Dec 17, 2018 at 02:58:21PM +0300, Vladislav Shpilevoy wrote:
>>> ---
>>> https://github.com/tarantool/tarantool/tree/gerold103/enable-gcov-on-mac
>>>
>>>   cmake/profile.cmake | 12 +++++++-----
>>>   1 file changed, 7 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/cmake/profile.cmake b/cmake/profile.cmake
>>> index 278399155..866c8a787 100644
>>> --- a/cmake/profile.cmake
>>> +++ b/cmake/profile.cmake
>>> @@ -1,12 +1,16 @@
>>> -check_library_exists (gcov __gcov_flush  ""  HAVE_GCOV)
>>> +check_library_exists(gcov __gcov_flush  ""  HAVE_GCOV)
>>>   
>>>   set(ENABLE_GCOV_DEFAULT OFF)
>>>   option(ENABLE_GCOV "Enable integration with gcov, a code coverage program" ${ENABLE_GCOV_DEFAULT})
>>>   
>>>   if (ENABLE_GCOV)
>>>       if (NOT HAVE_GCOV)
>>> -    message (FATAL_ERROR
>>> -         "ENABLE_GCOV option requested but gcov library is not found")
>>> +        if (CMAKE_COMPILER_IS_CLANG)
>>> +            message(WARNING "GCOV is available on clang from 3.0.0")
>>> +            set(HAVE_GCOV 1)
>>> +        else()
>>> +            message(FATAL_ERROR "ENABLE_GCOV option requested but gcov library is not found")
>>> +        endif()
>>>       endif()
>>>   
>>>       add_compile_flags("C;CXX"
>>> @@ -18,8 +22,6 @@ if (ENABLE_GCOV)
>>>       set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -ftest-coverage")
>>>       set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -fprofile-arcs")
>>>       set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -ftest-coverage")
>>> -
>>> -   # add_library(gcov SHARED IMPORTED)
>>>   endif()
>>>   
>>>   if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")