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aclocal.m4
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# generated automatically by aclocal 1.17 -*- Autoconf -*-
# Copyright (C) 1996-2024 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
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gcc)
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nosideeffect)
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# -----------------------------------
# Determine the filesystem's resolution for file modification
# timestamps. The coarsest we know of is FAT, with a resolution
# of only two seconds, even with the most recent "exFAT" extensions.
# The finest (e.g. ext4 with large inodes, XFS, ZFS) is one
# nanosecond, matching clock_gettime. However, it is probably not
# possible to delay execution of a shell script for less than one
# millisecond, due to process creation overhead and scheduling
# granularity, so we don't check for anything finer than that. (See below.)
AC_DEFUN([_AM_FILESYSTEM_TIMESTAMP_RESOLUTION], [dnl
AC_REQUIRE([_AM_SLEEP_FRACTIONAL_SECONDS])
AC_CACHE_CHECK([filesystem timestamp resolution],
am_cv_filesystem_timestamp_resolution, [dnl
# Default to the worst case.
am_cv_filesystem_timestamp_resolution=2