patch 8.2.3510: changes are only detected with one second accuracy
Problem: Changes are only detected with one second accuracy.
Solution: Use the nanosecond time if possible. (Leah Neukirchen,
closes #8873, closes #8875)
diff --git a/src/auto/configure b/src/auto/configure
index cab7bc9..cd5e593 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -13149,6 +13149,52 @@
fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for nanoseconds field of struct stat" >&5
+$as_echo_n "checking for nanoseconds field of struct stat... " >&6; }
+if ${ac_cv_struct_st_mtim_nsec+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_save_CPPFLAGS="$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"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/types.h>
+#include <sys/stat.h>
+int
+main ()
+{
+struct stat s; s.ST_MTIM_NSEC;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_struct_st_mtim_nsec=$ac_val; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ done
+ CPPFLAGS="$ac_save_CPPFLAGS"
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_struct_st_mtim_nsec" >&5
+$as_echo "$ac_cv_struct_st_mtim_nsec" >&6; }
+if test $ac_cv_struct_st_mtim_nsec != no; then
+
+cat >>confdefs.h <<_ACEOF
+#define ST_MTIM_NSEC $ac_cv_struct_st_mtim_nsec
+_ACEOF
+
+fi
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for iconv_open()" >&5
$as_echo_n "checking for iconv_open()... " >&6; }
save_LIBS="$LIBS"