naburi
March 29, 2021, 1:57pm
1
I’m trying to build an Attiny5 program from PlatformIO in VSCode under Windows. To do so this is what I’ve tried:
I created a board in “%userprofile%.platformio\boards\atTiny5.json” with the contents:
{
"build": {
"f_cpu": "1000000L",
"mcu": "attiny5"
},
"name": "ATtiny5",
"upload": {
"maximum_ram_size": 32,
"maximum_size": 512
},
"url": "http://www.atmel.com/devices/ATTINY5",
"vendor": "Atmel"
}
With this I had a compiler error that “crtattiny5.o” was not found. I noticed the file was at “%userprofile%.platformio\packages\toolchain-atmelavr\avr\lib\avrtiny” so I tried copying it to the parent folder, and it worked! (looks like a bug IMO)
But now there’s another error while linking:
%userprofile%/.platformio/packages/toolchain-atmelavr/bin/…/lib/gcc/avr/7.3.0/…/…/…/…/avr/bin/ld.exe: skipping incompatible %userprofile%/.platformio/packages/toolchain-atmelavr/bin/…/lib/gcc/avr/7.3.0/…/…/…/…/avr/lib\libm.a when searching for -lm
Is there any way to solve this?
I can compile the code using the console (and avr-gcc) just fine so I’m thinking that maybe it would be faster to make PlatformIO call a .bat or an app made by me instead. Could that be possible?
Also noted in https://groups.google.com/a/arduino.cc/g/developers/c/Ny82s7t11Vc and c++ - Programming ATtiny10 with Arduino ( "ld.exe" errors) - Stack Overflow and arduino uno - Cannot find crtatmega328p - Arduino Stack Exchange .
If I just take a simple main.cpp
#include <avr/io.h>
int main() {
return 0;
}
and run
C:\Users<user>.platformio\packages\toolchain-atmelavr@1.70300.191015\bin\avr-g++ -mmcu=atmega328p main.cpp
On it, it works. Also works with -mmcu=attiny85.
But with -mmcu=attiny5 (which is correct per docs it gives
avr-g++ -mmcu=attiny5 main.cpp
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: skipping incompatible c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0\libgcc.a when searching for -lgcc
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: cannot find -lgcc
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: skipping incompatible c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/lib\libm.a when searching for -lm
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: cannot find -lm
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: skipping incompatible c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0\libgcc.a when searching for -lgcc
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: cannot find -lgcc
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: skipping incompatible c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/lib\libm.a when searching for -lm
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: cannot find -lm
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: skipping incompatible c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/lib\libc.a when searching for -lc
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: cannot find -lc
c:/users/max/.platformio/packages/toolchain-atmelavr@1.70300.191015/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: cannot find -lattiny5
collect2.exe: error: ld returned 1 exit status
There is also a avr-libc note about it
https://nongnu.org/avr-libc/user-manual/FAQ.html#faq_tinyavr_c
So maybe it’s really not supported, or avr-gcc has a bug where it can’t find its own internal libraries. Were you ever able to compile a C/C++ program for the Attiny5 with avr-gcc?
Maybe try asking in the avr-gcc mailing list why this doesn’t work or to confirm it.
It is 100% a toolchain bug in 7.3.0.
Rolling back to 5.4.0 solves the problem.
Add
platform_packages =
toolchain-atmelavr@~1.50400.0
to the bottom of the platformio.ini and retry. Also see docs and available versions .
Processing attiny5 (platform: atmelavr; board: attiny5)
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/atmelavr/attiny5.html
PLATFORM: Atmel AVR (3.2.0) > ATtiny5
HARDWARE: ATTINY5 1MHz, 32B RAM, 512B Flash
PACKAGES:
- toolchain-atmelavr 1.50400.190710 (5.4.0)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 0 compatible libraries
Scanning dependencies...
No dependencies
Building in release mode
Compiling .pio\build\attiny5\src\main.o
Linking .pio\build\attiny5\firmware.elf
Building .pio\build\attiny5\firmware.hex
Checking size .pio\build\attiny5\firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM: [ ] 0.0% (used 0 bytes from 32 bytes)
Flash: [= ] 9.8% (used 50 bytes from 512 bytes)
==================== [SUCCESS] Took 1.53 seconds ====================
naburi
March 29, 2021, 2:55pm
5
Yep! It works!
1 Like