Replace platform ISC_PLATFORM_HAVESTATNSEC with config ENABLE_STAT_NSEC

config.h.in

@@ -398,6 +398,9 @@
 /* Define to 1 if you have the `sigwait' function. */
 #undef HAVE_SIGWAIT
 
+/* define if struct stat has st_mtim.tv_nsec field */
+#undef HAVE_STAT_NSEC
+
 /* Define to 1 if you have the <stdatomic.h> header file. */
 #undef HAVE_STDATOMIC_H
 

configure

@@ -708,7 +708,6 @@ FSTRM_CAPTURE
 PROTOC_C
 IRS_PLATFORM_USEDECLSPEC
 ISC_PLATFORM_USEDECLSPEC
-ISC_PLATFORM_HAVESTATNSEC
 ISC_PLATFORM_HAVESYSUNH
 LIBCAP_LIBS
 DST_EXTRA_SRCS
@@ -17918,31 +17917,28 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 #
 # Check for nanoseconds in file stats
 #
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking st_mtim.tv_nsec" >&5
-$as_echo_n "checking st_mtim.tv_nsec... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for st_mtim.tv_nsec" >&5
+$as_echo_n "checking for st_mtim.tv_nsec... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/fcntl.h>
 int
 main ()
 {
-struct stat s; return(s.st_mtim.tv_nsec);
+struct stat s;
+       return(s.st_mtim.tv_nsec);
+
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-	ISC_PLATFORM_HAVESTATNSEC="#define ISC_PLATFORM_HAVESTATNSEC 1"
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-	ISC_PLATFORM_HAVESTATNSEC="#undef ISC_PLATFORM_HAVESTATNSEC"
+
+$as_echo "#define HAVE_STAT_NSEC 1" >>confdefs.h
+
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
 #
 # Microsoft has their own way of handling shared libraries that requires
 # additional qualifiers on extern variables.  Unix systems don't need it.

configure.in

@@ -1990,13 +1990,14 @@ AC_DEFINE(NEED_OPTARG, 1, [Defined if extern char *optarg is not declared.])])
 #
 # Check for nanoseconds in file stats
 #
-AC_MSG_CHECKING(st_mtim.tv_nsec)
-AC_TRY_COMPILE([#include <sys/fcntl.h>],[struct stat s; return(s.st_mtim.tv_nsec);],
-	[AC_MSG_RESULT(yes)
-	ISC_PLATFORM_HAVESTATNSEC="#define ISC_PLATFORM_HAVESTATNSEC 1"],
-	[AC_MSG_RESULT(no)
-	ISC_PLATFORM_HAVESTATNSEC="#undef ISC_PLATFORM_HAVESTATNSEC"])
-AC_SUBST(ISC_PLATFORM_HAVESTATNSEC)
+AC_MSG_CHECKING([for st_mtim.tv_nsec])
+AC_COMPILE_IFELSE(
+  [AC_LANG_PROGRAM(
+     [[#include <sys/fcntl.h>]],
+     [[struct stat s;
+       return(s.st_mtim.tv_nsec);
+      ]])],
+   [AC_DEFINE([HAVE_STAT_NSEC], [1], [define if struct stat has st_mtim.tv_nsec field])])
 
 #
 # Microsoft has their own way of handling shared libraries that requires

lib/isc/include/isc/platform.h.in

@@ -58,11 +58,6 @@
  */
 @ISC_PLATFORM_KRB5HEADER@
 
-/*
- * Define if the system has nanosecond-level accuracy in file stats.
- */
-@ISC_PLATFORM_HAVESTATNSEC@
-
 /*
  * Used to control how extern data is linked; needed for Win32 platforms.
  */

lib/isc/unix/file.c

@@ -146,7 +146,7 @@ isc_file_getmodtime(const char *file, isc_time_t *modtime) {
 	result = file_stats(file, &stats);
 
 	if (result == ISC_R_SUCCESS)
-#ifdef ISC_PLATFORM_HAVESTATNSEC
+#if defined(HAVE_STAT_NSEC)
 		isc_time_set(modtime, stats.st_mtime, stats.st_mtim.tv_nsec);
 #else
 		isc_time_set(modtime, stats.st_mtime, 0);