ATTiny Support

[chappy1978]

ts seems there are a few bugs when programming ATTiny's using Platformio and the standard atmelavr packages. (Example: warning: "BIN" redefined #define BIN 2) I know its just a warning but who wants to look at that every time they build. I thought it would be nice to use ATTinyCore. After looking through Platformio's folders the folder format is very different, as compared to Arduino. How would I go through creating a package install for Platformio?

https://github.com/SpenceKonde/ATTinyCore

[ivankravets]

@valeros Please push all changes to https://github.com/platformio/platformio-pkg-framework-arduinoavr

• Add new core named attiny
• Updated existing board manifest with "core": "attiny"
• Add new variants and remove obsolete (currently added for existing attiny)
• Merge https://github.com/SpenceKonde/ATTinyCore/blob/master/avr/avrdude.conf with our config in our packages for all architectures
• Place https://github.com/SpenceKonde/ATTinyCore/tree/master/avr/libraries to __cores__/attiny

[ivankravets]

@chappy1978 @Thijxx could you re-test it?

1. Uninstall existing stable version of Atmel AVR development platform via pio platform uninstall atmelavr
2. Install development version: pio platform install https://github.com/platformio/platform-atmelavr.git

See all board manifests: https://github.com/platformio/platform-atmelavr/tree/develop/boards

Does it work?

I can see the changes made but I have no clue how to select the board.

[env:attiny85]
platform = atmelavr
board = attiny85
framework = arduino

This is not it, maybe you could shine a light on the config or better, point me to the right spot in the documentation :D

edit
It is in fact a complete mess now, no matter what code I try to build it always fails on the RadioHead library, it is not even included nor is it anywhere in the project folder. But this may be a whole new issue.

[ivankravets]

@Thijxx Could you provide a demo project to reproduce this issue?

This is the project folder.
It looks like it is missing the SPI data. I expect these to be available:
https://github.com/SpenceKonde/ATTinyCore/tree/master/avr/libraries

attiny85_spencekondetest.zip

[valeros]

Hi @Thijxx! Probably you should use software SPI as mentioned in the RadionHead library:

lib/TinyHead/RadioHead.h:786:4: warning: #warning Arduino TinyCore does not support hardware SPI. Use software SPI instead.

In ATTiny Core README said that with ATtiny x5 (25/45/85) you can use SPI USI library.

Have you tried to build your project in Arduino IDE?

Yes, this works in the Arduino IDE.
Below is the verbose compile log from the Arduino IDE based on the same code. There are many warnings but no errors.

/usr/share/arduino/arduino-builder -dump-prefs -logger=machine -hardware /usr/share/arduino/hardware -hardware /home/thijs/.arduino15/packages -hardware /home/thijs/Documents/Arduino/hardware -tools /usr/share/arduino/tools-builder -tools /home/thijs/.arduino15/packages -libraries /home/thijs/Documents/Arduino/libraries -fqbn=ATTinyCore-master:avr:attinyx5:LTO=disable,TimerClockSource=default,chip=85,clock=8internal,bod=disable -ide-version=10802 -build-path /tmp/arduino_build_937199 -warnings=default -build-cache /tmp/arduino_cache_229451 -prefs=build.warn_data_percentage=75 -verbose /tmp/arduino_modified_sketch_875097/Blink.ino
/usr/share/arduino/arduino-builder -compile -logger=machine -hardware /usr/share/arduino/hardware -hardware /home/thijs/.arduino15/packages -hardware /home/thijs/Documents/Arduino/hardware -tools /usr/share/arduino/tools-builder -tools /home/thijs/.arduino15/packages -libraries /home/thijs/Documents/Arduino/libraries -fqbn=ATTinyCore-master:avr:attinyx5:LTO=disable,TimerClockSource=default,chip=85,clock=8internal,bod=disable -ide-version=10802 -build-path /tmp/arduino_build_937199 -warnings=default -build-cache /tmp/arduino_cache_229451 -prefs=build.warn_data_percentage=75 -verbose /tmp/arduino_modified_sketch_875097/Blink.ino
Using board 'attinyx5' from platform in folder: /home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr
Using core 'tiny' from platform in folder: /home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr
Detecting libraries used...
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics   -w -x c++ -E -CC -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/tmp/arduino_build_937199/sketch/Blink.ino.cpp" -o "/dev/null"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics   -w -x c++ -E -CC -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "-I/home/thijs/Documents/Arduino/libraries/TinyHead" "/tmp/arduino_build_937199/sketch/Blink.ino.cpp" -o "/dev/null"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics   -w -x c++ -E -CC -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "-I/home/thijs/Documents/Arduino/libraries/TinyHead" "/home/thijs/Documents/Arduino/libraries/TinyHead/RHCRC.cpp" -o "/dev/null"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics   -w -x c++ -E -CC -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "-I/home/thijs/Documents/Arduino/libraries/TinyHead" "/home/thijs/Documents/Arduino/libraries/TinyHead/RHGenericDriver.cpp" -o "/dev/null"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics   -w -x c++ -E -CC -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "-I/home/thijs/Documents/Arduino/libraries/TinyHead" "/home/thijs/Documents/Arduino/libraries/TinyHead/RH_ASK.cpp" -o "/dev/null"
Generating function prototypes...
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics   -w -x c++ -E -CC -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "-I/home/thijs/Documents/Arduino/libraries/TinyHead" "/tmp/arduino_build_937199/sketch/Blink.ino.cpp" -o "/tmp/arduino_build_937199/preproc/ctags_target_for_gcc_minus_e.cpp"
"/usr/bin/arduino-ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "/tmp/arduino_build_937199/preproc/ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "-I/home/thijs/Documents/Arduino/libraries/TinyHead" "/tmp/arduino_build_937199/sketch/Blink.ino.cpp" -o "/tmp/arduino_build_937199/sketch/Blink.ino.cpp.o"
In file included from /home/thijs/Documents/Arduino/libraries/TinyHead/RHGenericDriver.h:9:0,
                 from /home/thijs/Documents/Arduino/libraries/TinyHead/RH_ASK.h:9,
                 from /tmp/arduino_modified_sketch_875097/Blink.ino:5:
/home/thijs/Documents/Arduino/libraries/TinyHead/RadioHead.h:786:4: warning: #warning Arduino TinyCore does not support hardware SPI. Use software SPI instead. [-Wcpp]
   #warning Arduino TinyCore does not support hardware SPI. Use software SPI instead.
    ^
Compiling libraries...
Compiling library "TinyHead"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "-I/home/thijs/Documents/Arduino/libraries/TinyHead" "/home/thijs/Documents/Arduino/libraries/TinyHead/RHCRC.cpp" -o "/tmp/arduino_build_937199/libraries/TinyHead/RHCRC.cpp.o"
In file included from /home/thijs/Documents/Arduino/libraries/TinyHead/RHCRC.h:12:0,
                 from /home/thijs/Documents/Arduino/libraries/TinyHead/RHCRC.cpp:43:
/home/thijs/Documents/Arduino/libraries/TinyHead/RadioHead.h:786:4: warning: #warning Arduino TinyCore does not support hardware SPI. Use software SPI instead. [-Wcpp]
   #warning Arduino TinyCore does not support hardware SPI. Use software SPI instead.
    ^
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "-I/home/thijs/Documents/Arduino/libraries/TinyHead" "/home/thijs/Documents/Arduino/libraries/TinyHead/RHGenericDriver.cpp" -o "/tmp/arduino_build_937199/libraries/TinyHead/RHGenericDriver.cpp.o"
In file included from /home/thijs/Documents/Arduino/libraries/TinyHead/RHGenericDriver.h:9:0,
                 from /home/thijs/Documents/Arduino/libraries/TinyHead/RHGenericDriver.cpp:6:
/home/thijs/Documents/Arduino/libraries/TinyHead/RadioHead.h:786:4: warning: #warning Arduino TinyCore does not support hardware SPI. Use software SPI instead. [-Wcpp]
   #warning Arduino TinyCore does not support hardware SPI. Use software SPI instead.
    ^
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "-I/home/thijs/Documents/Arduino/libraries/TinyHead" "/home/thijs/Documents/Arduino/libraries/TinyHead/RH_ASK.cpp" -o "/tmp/arduino_build_937199/libraries/TinyHead/RH_ASK.cpp.o"
In file included from /home/thijs/Documents/Arduino/libraries/TinyHead/RHGenericDriver.h:9:0,
                 from /home/thijs/Documents/Arduino/libraries/TinyHead/RH_ASK.h:9,
                 from /home/thijs/Documents/Arduino/libraries/TinyHead/RH_ASK.cpp:6:
/home/thijs/Documents/Arduino/libraries/TinyHead/RadioHead.h:786:4: warning: #warning Arduino TinyCore does not support hardware SPI. Use software SPI instead. [-Wcpp]
   #warning Arduino TinyCore does not support hardware SPI. Use software SPI instead.
    ^
Compiling core...
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-gcc" -c -g -Os  -std=gnu11 -ffunction-sections -fdata-sections -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/WInterrupts.c" -o "/tmp/arduino_build_937199/core/WInterrupts.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-gcc" -c -g -Os  -std=gnu11 -ffunction-sections -fdata-sections -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/wiring.c" -o "/tmp/arduino_build_937199/core/wiring.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-gcc" -c -g -Os  -std=gnu11 -ffunction-sections -fdata-sections -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/wiring_analog.c" -o "/tmp/arduino_build_937199/core/wiring_analog.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-gcc" -c -g -Os  -std=gnu11 -ffunction-sections -fdata-sections -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/wiring_digital.c" -o "/tmp/arduino_build_937199/core/wiring_digital.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-gcc" -c -g -Os  -std=gnu11 -ffunction-sections -fdata-sections -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/wiring_pulse.c" -o "/tmp/arduino_build_937199/core/wiring_pulse.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-gcc" -c -g -Os  -std=gnu11 -ffunction-sections -fdata-sections -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/wiring_shift.c" -o "/tmp/arduino_build_937199/core/wiring_shift.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/HardwareSerial.cpp" -o "/tmp/arduino_build_937199/core/HardwareSerial.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/Print.cpp" -o "/tmp/arduino_build_937199/core/Print.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/Stream.cpp" -o "/tmp/arduino_build_937199/core/Stream.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/TinySoftwareSerial.cpp" -o "/tmp/arduino_build_937199/core/TinySoftwareSerial.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/Tone.cpp" -o "/tmp/arduino_build_937199/core/Tone.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/WMath.cpp" -o "/tmp/arduino_build_937199/core/WMath.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/WString.cpp" -o "/tmp/arduino_build_937199/core/WString.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10802 -DARDUINO_AVR_ATTINYX5 -DARDUINO_ARCH_AVR   "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny" "-I/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/variants/tinyX5" "/home/thijs/Documents/Arduino/hardware/ATTinyCore-master/avr/cores/tiny/main.cpp" -o "/tmp/arduino_build_937199/core/main.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/WInterrupts.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/wiring.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/wiring_analog.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/wiring_digital.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/wiring_pulse.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/wiring_shift.c.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/HardwareSerial.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/Print.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/Stream.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/TinySoftwareSerial.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/Tone.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/WMath.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/WString.cpp.o"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-ar" rcs  "/tmp/arduino_build_937199/core/core.a" "/tmp/arduino_build_937199/core/main.cpp.o"
Archiving built core (caching) in: /tmp/arduino_cache_229451/core/core_ATTinyCore-master_avr_attinyx5_LTO_disable,TimerClockSource_default,chip_85,clock_8internal,bod_disable_f4697a13a0e708cd609d188b74bfe921.a
Linking everything together...
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-gcc"  -Os  -Wl,--gc-sections -mmcu=attiny85  -o "/tmp/arduino_build_937199/Blink.ino.elf" "/tmp/arduino_build_937199/sketch/Blink.ino.cpp.o" "/tmp/arduino_build_937199/libraries/TinyHead/RHCRC.cpp.o" "/tmp/arduino_build_937199/libraries/TinyHead/RHGenericDriver.cpp.o" "/tmp/arduino_build_937199/libraries/TinyHead/RH_ASK.cpp.o" "/tmp/arduino_build_937199/core/core.a" "-L/tmp/arduino_build_937199" -lm
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-objcopy" -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0  "/tmp/arduino_build_937199/Blink.ino.elf" "/tmp/arduino_build_937199/Blink.ino.eep"
"/home/thijs/.arduino15/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/bin/avr-objcopy" -O ihex -R .eeprom  "/tmp/arduino_build_937199/Blink.ino.elf" "/tmp/arduino_build_937199/Blink.ino.hex"
Using library TinyHead in folder: /home/thijs/Documents/Arduino/libraries/TinyHead (legacy)
Sketch uses 5048 bytes (61%) of program storage space. Maximum is 8192 bytes.
Global variables use 393 bytes (76%) of dynamic memory, leaving 119 bytes for local variables. Maximum is 512 bytes.
Low memory available, stability problems may occur.

[valeros]

Could you please try to manually disable SPI library in your project?

[env:attiny85]
platform = atmelavr
board = attiny85
framework = arduino
lib_ignore = SPI

This seems to work. Could you please elaborate on why this works the way it does? I'd expect the Arduino IDE to show the same behaviour..

[env:attiny85]
platform = atmelavr
board = attiny85
framework = arduino
lib_ignore = SPI

How the core switching works is still not clear to me, don't I need to include core = tiny or anything in the ini file?