From 7321927361fe438530f2774d7a6cdfbba228711f Mon Sep 17 00:00:00 2001
From: John Cupitt <jcupitt@gmail.com>
Date: Tue, 29 Oct 2019 20:31:43 +0000
Subject: [PATCH] update to GDateTime

---
 libvips/iofuncs/vips.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/libvips/iofuncs/vips.c b/libvips/iofuncs/vips.c
index 6e9c0fcc..d3c2df30 100644
--- a/libvips/iofuncs/vips.c
+++ b/libvips/iofuncs/vips.c
@@ -955,22 +955,37 @@ char *
 vips__xml_properties( VipsImage *image )
 {
 	VipsDbuf dbuf;
-	GTimeVal now;
 	char *date;
 
 	vips_dbuf_init( &dbuf ); 
 
+#ifdef HAVE_DATE_TIME_FORMAT_ISO8601
+{
+	GDateTime *now;
+
+	now = g_date_time_new_now_local();
+	date = g_date_time_format_iso8601( now );
+	g_date_time_unref( now );
+}
+#else /*!HAVE_DATE_TIME_FORMAT_ISO8601*/
+{
+	GTimeVal now;
+
 	g_get_current_time( &now );
 	date = g_time_val_to_iso8601( &now ); 
+}
+#endif /*HAVE_DATE_TIME_FORMAT_ISO8601*/
+
 	vips_dbuf_writef( &dbuf, "<?xml version=\"1.0\"?>\n" ); 
 	vips_dbuf_writef( &dbuf, "<image xmlns=\"%s/dzsave\" "
 		"date=\"%s\" version=\"%d.%d.%d\">\n", 
 		NAMESPACE_URI, 
 		date, 
 		VIPS_MAJOR_VERSION, VIPS_MINOR_VERSION, VIPS_MICRO_VERSION );
-	g_free( date ); 
 	vips_dbuf_writef( &dbuf, "  <properties>\n" );  
 
+	g_free( date ); 
+
 	if( vips_image_map( image, vips__xml_properties_meta, &dbuf ) ) {
 		vips_dbuf_destroy( &dbuf );
 		return( NULL );