thodg/libgit2/cmake/Modules/FindStatNsec.cmake
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Hash : df54c7fb
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Date : 2019-06-27T07:34:43
cmake: report whether we are using sub-second stat information Depending on the platform and on build options, we may or may not build libgit2 with support for nanoseconds when using `stat` calls. It's currently unclear though whether sub-second stat information is used at all. Add feature info for this to tell at configure time whether it's being used or not.
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cmake/Modules/FindStatNsec.cmake
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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")