<font face="Arial, Verdana">Windows 10, Arduino 1.6.13, SAMS 1.6.11 installed, modified boards.txt and variants added to folder shown in readme.txt. Repetier Firmware Configutator 1.0.0dev (</font>https://www.repetier.com/firmware/dev/index.php).
Board selected as above, COM7 Programming Port. Compilation errors are:-
C:\Users#####\AppData\Local\Temp\arduino_build_783006/core\core.a(wiring_analog.c.o): In function analogWrite':</span></div><div><span style="font-size: 13.3333px; font-family: "Courier New";"><br/></span></div><div><span style="font-size: 13.3333px; font-family: "Courier New";">C:\Users\#####\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.11\cores\arduino/wiring_analog.c:349: undefined reference to
g_pinStatus'
C:\Users</span>#####\AppData\Local\Temp\arduino_build_783006/core\core.a(wiring_digital.c.o): In function pinMode':</span></div><div><span style="font-size: 13.3333px; font-family: "Courier New";"><br/></span></div><div><span style="font-size: 13.3333px; font-family: "Courier New";">C:\Users\</span><span style="font-family: "Courier New"; font-size: 13.3333px;">#####</span><span style="font-size: 13.3333px; font-family: "Courier New";">\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.11\cores\arduino/wiring_digital.c:82: undefined reference to
g_pinStatus'
C:\Users</span>#####\AppData\Local\Temp\arduino_build_783006/core\core.a(wiring_digital.c.o): In function digitalWrite':</span></div><div><span style="font-size: 13.3333px; font-family: "Courier New";"><br/></span></div><div><span style="font-size: 13.3333px; font-family: "Courier New";">C:\Users\</span><span style="font-family: "Courier New"; font-size: 13.3333px;">#####</span><span style="font-size: 13.3333px; font-family: "Courier New";">\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.11\cores\arduino/wiring_digital.c:113: undefined reference to
g_pinStatus'
C:\Users</span>#####\AppData\Local\Temp\arduino_build_783006/core\core.a(wiring_digital.c.o): In function digitalRead':</span></div><div><span style="font-size: 13.3333px; font-family: "Courier New";"><br/></span></div><div><span style="font-size: 13.3333px; font-family: "Courier New";">C:\Users\</span><span style="font-family: "Courier New"; font-size: 13.3333px;">#####</span><span style="font-size: 13.3333px; font-family: "Courier New";">\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.11\cores\arduino/wiring_digital.c:136: undefined reference to
g_pinStatus'
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino Due for Repetier (Programming port).
Tried with #define FEATURE_WATCHDOG 1 and 0 in configuration.h no difference.
When I use Ardunio Due (Programming Port) I have no issues. Pointers please...