File atril-synctex-1.18.patch of Package atril

--- a/configure.ac
+++ b/configure.ac
@@ -89,7 +89,7 @@ GTK_REQUIRED=3.22.0
 WEBKIT_REQUIRED=2.6.0
 LIBSECRET_REQUIRED=0.5
 LIBXML_REQUIRED=2.5.0
-SYNCTEX_REQUIRED=1.21
+SYNCTEX_REQUIRED=1.18
 
 AC_SUBST([GLIB_REQUIRED])
 AC_SUBST([GTK_REQUIRED])
@@ -364,6 +364,11 @@ dnl ================== libsynctex ======
 
 PKG_CHECK_MODULES(SYNCTEX, [synctex >= $SYNCTEX_REQUIRED], has_synctex=yes, has_synctex=no)
 
+PKG_CHECK_EXISTS(synctex >= 1.21, [have_synctex_1_21=yes], [have_synctex_1_21=no])
+if test "$have_synctex_1_21" = yes; then
+  AC_DEFINE(HAVE_SYNCTEX_1_21, 1, [synctex >= 1.21 present])
+fi
+
 dnl not found? use internal code copy.
 if test "x$has_synctex" = "xno"; then
         AC_MSG_ERROR("SyncTeX support is disabled since library version $SYNCTEX_REQUIRED or newer not found")
--- a/libdocument/ev-document.c
+++ b/libdocument/ev-document.c
@@ -28,6 +28,12 @@
 #include "synctex_parser.h"
 #include "ev-file-helpers.h"
 
+#ifndef HAVE_SYNCTEX_1_21
+typedef synctex_node_t    synctex_node_p;
+typedef synctex_scanner_t synctex_scanner_p;
+#define synctex_scanner_next_result synctex_next_result
+#endif
+
 typedef struct _EvPageSize
 {
 	gdouble width;
@@ -471,7 +477,11 @@ ev_document_synctex_forward_search (EvDo
         if (!scanner)
                 return NULL;
 
+#ifdef HAVE_SYNCTEX_1_21
         if (synctex_display_query (scanner, link->filename, link->line, link->col, 0) > 0) {
+#else
+        if (synctex_display_query (scanner, link->filename, link->line, link->col) > 0) {
+#endif
                 synctex_node_p node;
                 gint           page;