avr-g++: error: missing device or architecture after '-mmcu='

[chrisspen]

I'm attempting to compile a small ROS Arduino project with the Makefile:

BOARD_TAG    = uno_pro
MONITOR_PORT = /dev/ttyACM0
AVRDUDE_OPTS = -v
ARDUINO_LIBS = ros_lib Wire Adafruit_BNO055
USER_LIB_PATH = /home/$(USER)/Arduino/libraries
include /usr/share/arduino/Arduino.mk

I have the head of Arduino-Makefile checked out to /usr/share/arduino.

I have Arduino IDE 1.8.2 installed to /usr/share/arduino.

I'm compiling for the Arduino Uno*Pro, which requires some additional files installed, as explained here.

When I run make, I get the error:

-------------------------
Arduino.mk Configuration:
- [AUTODETECTED]       CURRENT_OS = LINUX 
- [AUTODETECTED]       ARDUINO_DIR = /usr/share/arduino 
- [COMPUTED]           ARDMK_DIR = /usr/share/arduino (relative to Common.mk)
- [AUTODETECTED]       ARDUINO_VERSION = 105 
- [DEFAULT]            ARCHITECTURE =  
- [DEFAULT]            ARDMK_VENDOR = arduino 
- [AUTODETECTED]       ARDUINO_PREFERENCES_PATH = /home/chris/.arduino/preferences.txt 
- [AUTODETECTED]       ARDUINO_SKETCHBOOK = /home/chris/Arduino
- [BUNDLED]            AVR_TOOLS_DIR = /usr/share/arduino/hardware/tools/avr (in Arduino distribution)
- [COMPUTED]           ARDUINO_LIB_PATH = /usr/share/arduino/libraries (from ARDUINO_DIR)
- [COMPUTED]           ARDUINO_VAR_PATH = /usr/share/arduino/hardware/arduino//variants (from ARDUINO_DIR)
- [COMPUTED]           BOARDS_TXT = /usr/share/arduino/hardware/arduino//boards.txt (from ARDUINO_DIR)
- [USER]               USER_LIB_PATH = /home/chris/Arduino/libraries 
- [DEFAULT]            PRE_BUILD_HOOK = pre-build-hook.sh 
- [USER]               BOARD_TAG = uno_pro 
- [COMPUTED]           CORE =  (from build.core)
- [COMPUTED]           VARIANT =  (from build.variant)
- [COMPUTED]           OBJDIR = build-uno_pro (from BOARD_TAG)
- [DEFAULT]            ARDUINO_CORE_PATH = /usr/share/arduino/hardware/arduino//cores/arduino 
- [ASSUMED]            MONITOR_BAUDRATE = 9600 
- [DEFAULT]            OPTIMIZATION_LEVEL = s 
- [DEFAULT]            MCU_FLAG_NAME = mmcu 
- [DEFAULT]            CFLAGS_STD = -std=gnu11 -flto -fno-fat-lto-objects 
- [DEFAULT]            CXXFLAGS_STD = -std=gnu++11 -fno-threadsafe-statics -flto 
- [COMPUTED]           DEVICE_PATH = /dev/ttyACM0 (from MONITOR_PORT)
- [DEFAULT]            FORCE_MONITOR_PORT =  
- [AUTODETECTED]       Size utility: AVR-aware for enhanced output
-
-                      ARDUINO_LIBS =
- [USER]                 Adafruit_BNO055
- [USER]                 ros_lib
- [SYSTEM]               Wire
- [COMPUTED]           BOOTLOADER_PARENT = /usr/share/arduino/hardware/arduino//bootloaders (from ARDUINO_DIR)
- [COMPUTED]           ARDMK_VERSION = 1.5 
- [COMPUTED]           CC_VERSION = 4.9.2 (avr-gcc)
-------------------------
mkdir -p build-uno_pro
/usr/share/arduino/hardware/tools/avr/bin/avr-g++ -x c++ -include Arduino.h -MMD -c -mmcu= -DF_CPU= -DARDUINO=105  -D__PROG_TYPES_COMPAT__ -I/usr/share/arduino/hardware/arduino//cores/arduino -I/usr/share/arduino/hardware/arduino//variants/    -I/usr/share/arduino/libraries/Wire -I/usr/share/arduino/libraries/Wire/utility    -I/home/chris/Arduino/libraries/Adafruit_BNO055 -I/home/chris/Arduino/libraries/Adafruit_BNO055/utility   -I/home/chris/Arduino/libraries/ros_lib -Wall -ffunction-sections -fdata-sections -Os -fpermissive -fno-exceptions -std=gnu++11 -fno-threadsafe-statics -flto main.ino -o build-uno_pro/main.ino.o
avr-g++: error: missing device or architecture after '-mmcu='
/usr/share/arduino/Arduino.mk:1251: recipe for target 'build-uno_pro/main.ino.o' failed
make: *** [build-uno_pro/main.ino.o] Error 1

I'm assuming this error is due to the malformed ARDUINO_CORE_PATH and BOARDS_TXT values, which have a double-slash and appear to be missing the /avr/ sub-folder. e.g. BOARDS_TXT should be /usr/share/arduino/hardware/arduino/avr/boards.txt. This is causing the wrong boards.txt to be loaded, which contains the mmcu value need to compile.

Why are these paths malformed? Does Arduino-Makefile not support Arduino 1.8.2?

Because I'm compiling a ROS project, I had to install the ros-kinetic-rosserial-arduino package, which requires arduino-core, which includes the Arduino 1.0.5 IDE, and presumably conflicts with my manual installation of Arduino 1.8.2. How do I tell Arduino-Makefile to use the 1.8.2 settings?

[sej7278]

you don't have 1.8.2 installed in /usr/share/arduino, you have 1.0.5 there.

set ARDUINO_DIR to the path to 1.8.2 and set ALTERNATE_CORE to the core's location, as per the documentation

[chrisspen]

Yeah, I had to clear /usr/share/arduino and reinstall 1.8.2. It's frustrating that the official Ubuntu package uses such an ancient version.

[sej7278]

its easier just to untar 1.8.2 to some directory and leave the ubuntu 1.0.5 in /usr/share/arduino, for anything AVR there's nothing much that 1.8.2 offers over 1.0.5

if you want a newer ubuntu (well, debian) package then nag arduino to sort out their licensing:

arduino/Arduino#2703

arduino/Arduino#1117