[tarantool-patches] Re: [PATCH] cmake: fix sync_file_range detection

[Konstantin Osipov <kostja@tarantool.org>]

* Vladimir Davydov <vdavydov.dev@gmail.com> [18/10/06 19:34]:
> sync_file_range is declared only if _GNU_SOURCE macro is defined.
> Also, in order to be used in a source file, HAVE_SYNC_FILE_RANGE
> must be present in config.h.cmake.
> 
> Fixes commit caae99e5eaa0 ("Refactor xlog writer").
> ---
> https://github.com/tarantool/tarantool/commits/dv/cmake-fix-gnu-symbol-detection
> 
>  CMakeLists.txt            | 2 ++
>  src/trivia/config.h.cmake | 1 +
>  2 files changed, 3 insertions(+)
> 
> diff --git a/CMakeLists.txt b/CMakeLists.txt
> index bf68d187..b26d2abf 100644
> --- a/CMakeLists.txt
> +++ b/CMakeLists.txt
> @@ -69,6 +69,8 @@ include(cmake/profile.cmake)
>  include(cmake/module.cmake)
>  include(cmake/thread.cmake)
>  
> +list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
> +

Uhm, why are we defining this here and not where we check for sync
file range? 

>  check_symbol_exists(MAP_ANON sys/mman.h HAVE_MAP_ANON)
>  check_symbol_exists(MAP_ANONYMOUS sys/mman.h HAVE_MAP_ANONYMOUS)
>  check_include_file(sys/time.h HAVE_SYS_TIME_H)

-- 
Konstantin Osipov, Moscow, Russia, +7 903 626 22 32
http://tarantool.io - www.twitter.com/kostja_osipov