thodg/libgit2/cmake/FindStatNsec.cmake

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• Hash : 9324d16e
  Author :
  Date : 2021-11-06T16:14:47
  

  cmake: standardize USE_THREADS and USE_NSEC Threading can now be disabled with `USE_THREADS=OFF` instead of `THREADSAFE=OFF` to better support the other cmake semantics. Nanosecond support is the default _if_ we can detect it. This should be our default always - like threads - and people can opt out explicitly.

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• cmake/FindStatNsec.cmake

• include(FeatureSummary)
  
  check_struct_has_member("struct stat" st_mtim "sys/types.h;sys/stat.h"
  	HAVE_STRUCT_STAT_ST_MTIM LANGUAGE C)
  check_struct_has_member("struct stat" st_mtimespec "sys/types.h;sys/stat.h"
  	HAVE_STRUCT_STAT_ST_MTIMESPEC LANGUAGE C)
  check_struct_has_member("struct stat" st_mtime_nsec sys/stat.h
  	HAVE_STRUCT_STAT_MTIME_NSEC LANGUAGE C)
  
  if(HAVE_STRUCT_STAT_ST_MTIM)
  	check_struct_has_member("struct stat" st_mtim.tv_nsec sys/stat.h
  		HAVE_STRUCT_STAT_NSEC LANGUAGE C)
  elseif(HAVE_STRUCT_STAT_ST_MTIMESPEC)
  	check_struct_has_member("struct stat" st_mtimespec.tv_nsec sys/stat.h
  		HAVE_STRUCT_STAT_NSEC LANGUAGE C)
  else()
  	set(HAVE_STRUCT_STAT_NSEC ON )
  endif()
  
  add_feature_info(nanoseconds USE_NSEC "support nanosecond precision file mtimes and ctimes")
  

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