Latest version compile fail on platformIO with raspberry pi pico

[fllay]

This is my platformIO init file for pico

[env:pico]
platform = https://github.com/maxgerhardt/platform-raspberrypi.git
board = pico
framework = arduino
board_build.core = earlephilhower
lib_deps = https://github.com/micro-ROS/micro_ros_platformio

It is ok. However after I updated version, it fail like this

Linking .pio/build/pico/firmware.elf
/Users/cake/.platformio/packages/toolchain-rp2040-earlephilhower/bin/../lib/gcc/arm-none-eabi/14.2.0/../../../../arm-none-eabi/bin/ld: /Users/cake/.platformio/packages/framework-arduinopico/lib/rp2040/libpico.a(atomic.c.obj): in function `save_and_disable_interrupts':
/home/earle/Arduino/hardware/pico/rp2040/pico-sdk/src/rp2_common/hardware_sync/include/hardware/sync.h:214: multiple definition of `__atomic_load_8'; .pio/libdeps/pico/micro_ros_platformio/libmicroros/libmicroros.a(librcutils__atomic_64bits.c.obj):atomic_64bits.c:(.text.__atomic_load_8+0x0): first defined here
/Users/cake/.platformio/packages/toolchain-rp2040-earlephilhower/bin/../lib/gcc/arm-none-eabi/14.2.0/../../../../arm-none-eabi/bin/ld: /Users/cake/.platformio/packages/framework-arduinopico/lib/rp2040/libpico.a(atomic.c.obj): in function `__atomic_store_8':
/home/earle/Arduino/hardware/pico/rp2040/pico-sdk/src/rp2_common/pico_atomic/atomic.c:135: multiple definition of `__atomic_store_8'; .pio/libdeps/pico/micro_ros_platformio/libmicroros/libmicroros.a(librcutils__atomic_64bits.c.obj):atomic_64bits.c:(.text.__atomic_store_8+0x0): first defined here
/Users/cake/.platformio/packages/toolchain-rp2040-earlephilhower/bin/../lib/gcc/arm-none-eabi/14.2.0/../../../../arm-none-eabi/bin/ld: /Users/cake/.platformio/packages/framework-arduinopico/lib/rp2040/libpico.a(atomic.c.obj): in function `__atomic_exchange_8':
/home/earle/Arduino/hardware/pico/rp2040/pico-sdk/src/rp2_common/pico_atomic/atomic.c:166: multiple definition of `__atomic_exchange_8'; .pio/libdeps/pico/micro_ros_platformio/libmicroros/libmicroros.a(librcutils__atomic_64bits.c.obj):atomic_64bits.c:(.text.__atomic_exchange_8+0x0): first defined here
/Users/cake/.platformio/packages/toolchain-rp2040-earlephilhower/bin/../lib/gcc/arm-none-eabi/14.2.0/../../../../arm-none-eabi/bin/ld: /Users/cake/.platformio/packages/framework-arduinopico/lib/rp2040/libpico.a(atomic.c.obj): in function `__atomic_fetch_add_8':
/home/earle/Arduino/hardware/pico/rp2040/pico-sdk/src/rp2_common/pico_atomic/atomic.c:192: multiple definition of `__atomic_fetch_add_8'; .pio/libdeps/pico/micro_ros_platformio/libmicroros/libmicroros.a(librcutils__atomic_64bits.c.obj):atomic_64bits.c:(.text.__atomic_fetch_add_8+0x0): first defined here
collect2: error: ld returned 1 exit status
*** [.pio/build/pico/firmware.elf] Error 1

But if I changed the init file to use with pico 2 like

[env:pico]
platform = https://github.com/maxgerhardt/platform-raspberrypi.git
board = rpipico2
framework = arduino
board_build.core = earlephilhower
lib_deps = https://github.com/micro-ROS/micro_ros_platformio

It can upload to the pico 2 board and It seems to be ok (I did not test functionality but the LED blink just fine). Any idea what wrong with the original pico?

[maxgerhardt]

We did a toolchain upgrade to GCC 14, alongside a Pico-SDK upgrade to 2.0.0, so now it seems like both libmicroros.a and libpico.a have an implementation of __atomic_{store/exchange/fetch_add}_8 in them.

Specifically, this file is inside the libpico.a in a precompiled form: https://github.com/raspberrypi/pico-sdk/blob/efe2103f9b28458a1615ff096054479743ade236/src/rp2_common/pico_atomic/atomic.c#L4

Three ways to resolve this:

1. Obtain / recompile a libmicroros.a which has its own __atomic code disabled
2. Strip libpico.a of the atomic.c.obj file. You can achieve this by e.g. using arm-none-eabi-ar dv libpico.a atomic.c.obj (compare https://unix.stackexchange.com/a/181364)
3. Strip libmicroros.a of the librcutils__atomic_64bits.c.obj file. You can achieve this by e.g. using arm-none-eabi-ar dv libmicroros.a librcutils__atomic_64bits.c.obj (compare https://unix.stackexchange.com/a/181364)