gentoo-overlay/dev-embedded/avrdude/files/avrdude-5.10-jtagmkII-debugWire.patch

Suggested by Timon Van Overveldt <timonvo@gmail.com> 
on https://savannah.nongnu.org/bugs/index.php?30268

--- avrdude-5.10/jtagmkII.c
+++ avrdude-5.10/jtagmkII.c
@@ -1270,10 +1270,12 @@
       return -1;
   }
 
-  if (jtagmkII_setparm(pgm, PAR_DAISY_CHAIN_INFO, PDATA(pgm)->jtagchain) < 0) {
-    fprintf(stderr, "%s: jtagmkII_initialize(): Failed to setup JTAG chain\n",
-            progname);
-    return -1;
+  if(strcmp(ifname, "debugWire") != 0) {
+    if (jtagmkII_setparm(pgm, PAR_DAISY_CHAIN_INFO, PDATA(pgm)->jtagchain) < 0) {
+      fprintf(stderr, "%s: jtagmkII_initialize(): Failed to setup JTAG chain\n",
+              progname);
+      return -1;
+    }
   }
 
   /*