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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()
IF (HAVE_STRUCT_STAT_NSEC OR WIN32)
OPTION( USE_NSEC "Care about sub-second file mtimes and ctimes" ON )
ELSE()
SET(USE_NSEC OFF)
ENDIF()
ADD_FEATURE_INFO(nanoseconds USE_NSEC "whether to use sub-second file mtimes and ctimes")
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