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patch 8.2.3510: changes are only detected with one second accuracy

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Problem:    Changes are only detected with one second accuracy.
Solution:   Use the nanosecond time if possible.  (Leah Neukirchen,
            closes #8873, closes #8875)
This commit is contained in:
Leah Neukirchen
2021-10-14 21:27:55 +01:00
committed by Bram Moolenaar
parent 340dd0fbe4
commit 0a7984af56
13 changed files with 151 additions and 6 deletions
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25
src/configure.ac
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@@ -3843,6 +3843,31 @@ main() {struct stat st; exit(stat("configure/", &st) != 0); }
if test "x$vim_cv_stat_ignores_slash" = "xyes" ; then
AC_DEFINE(STAT_IGNORES_SLASH)
fi
dnl nanoseconds field of struct stat
AC_CACHE_CHECK([for nanoseconds field of struct stat],
ac_cv_struct_st_mtim_nsec,
[ac_save_CPPFLAGS="$CPPFLAGS"
ac_cv_struct_st_mtim_nsec=no
# st_mtim.tv_nsec -- the usual case
# st_mtim._tv_nsec -- Solaris 2.6, if
# (defined _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED == 1
# && !defined __EXTENSIONS__)
# st_mtim.st__tim.tv_nsec -- UnixWare 2.1.2
# st_mtime_n -- AIX 5.2 and above
# st_mtimespec.tv_nsec -- Darwin (Mac OSX)
for ac_val in st_mtim.tv_nsec st_mtim._tv_nsec st_mtim.st__tim.tv_nsec st_mtime_n st_mtimespec.tv_nsec; do
CPPFLAGS="$ac_save_CPPFLAGS -DST_MTIM_NSEC=$ac_val"
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/stat.h>], [struct stat s; s.ST_MTIM_NSEC;],
[ac_cv_struct_st_mtim_nsec=$ac_val; break])
done
CPPFLAGS="$ac_save_CPPFLAGS"
])
if test $ac_cv_struct_st_mtim_nsec != no; then
AC_DEFINE_UNQUOTED([ST_MTIM_NSEC], [$ac_cv_struct_st_mtim_nsec],
[Define if struct stat contains a nanoseconds field])
fi
dnl Link with iconv for charset translation, if not found without library.
dnl check for iconv() requires including iconv.h