Firmware build resulting in linker error

OpenMV Boards
4

As the development version doesn’t work, I tried checking out the 4.7.0 version (the latest stable as I understand), doing a make cleanin both the main repo and the mpu-cross compiler directory, and then rebuilding as above, I get the same very similar errors as when building the latest version.

Running $ make -j1 TARGET=OPENMV4 again, I’m getting new errors (final part shown)

[...]
/home/felix/bin/arm-none-eabi-toolchain/bin/../lib/gcc/arm-none-eabi/14.3.1/../../../../arm-none-eabi/bin/ld: (i2c_slave_irq_handler): Unknown destination type (ARM/Thumb) in /home/felix/src/openmv/build/lib/micropython/i2c.o
/home/felix/src/openmv/lib/micropython/ports/stm32/i2c.c:656:(.text.I2C2_ER_IRQHandler+0xa): dangerous relocation: unsupported relocation
/home/felix/bin/arm-none-eabi-toolchain/bin/../lib/gcc/arm-none-eabi/14.3.1/../../../../arm-none-eabi/bin/ld: /home/felix/src/openmv/build/lib/micropython/i2c.o: in function `I2C4_EV_IRQHandler':
/home/felix/src/openmv/lib/micropython/ports/stm32/i2c.c:708:(.text.I2C4_EV_IRQHandler+0xa): undefined reference to `i2c_slave_irq_handler'
/home/felix/bin/arm-none-eabi-toolchain/bin/../lib/gcc/arm-none-eabi/14.3.1/../../../../arm-none-eabi/bin/ld: (i2c_slave_irq_handler): Unknown destination type (ARM/Thumb) in /home/felix/src/openmv/build/lib/micropython/i2c.o
/home/felix/src/openmv/lib/micropython/ports/stm32/i2c.c:708:(.text.I2C4_EV_IRQHandler+0xa): dangerous relocation: unsupported relocation
/home/felix/bin/arm-none-eabi-toolchain/bin/../lib/gcc/arm-none-eabi/14.3.1/../../../../arm-none-eabi/bin/ld: /home/felix/src/openmv/build/lib/micropython/i2c.o: in function `I2C4_ER_IRQHandler':
/home/felix/src/openmv/lib/micropython/ports/stm32/i2c.c:724:(.text.I2C4_ER_IRQHandler+0xa): undefined reference to `i2c_slave_irq_handler'
/home/felix/bin/arm-none-eabi-toolchain/bin/../lib/gcc/arm-none-eabi/14.3.1/../../../../arm-none-eabi/bin/ld: (i2c_slave_irq_handler): Unknown destination type (ARM/Thumb) in /home/felix/src/openmv/build/lib/micropython/i2c.o
/home/felix/src/openmv/lib/micropython/ports/stm32/i2c.c:724:(.text.I2C4_ER_IRQHandler+0xa): dangerous relocation: unsupported relocation
Memory region         Used Size  Region Size  %age Used
            DTCM:           0 B       128 KB      0.00%
            ITCM:         64 KB        64 KB    100.00%
           SRAM0:        512 KB       512 KB    100.00%
           SRAM1:      284996 B       280 KB     99.40%
           SRAM2:          8 KB         8 KB    100.00%
           SRAM4:         64 KB        64 KB    100.00%
       FLASH_FFS:           0 B       128 KB      0.00%
      FLASH_TEXT:     1655164 B      1664 KB     97.14%
collect2: error: ld returned 1 exit status
make: *** [/home/felix/src/openmv/ports/stm32/omv_portconfig.mk:228: firmware] Error 1

This time, no build artifacts are generated at all.

I don’t have any idea what’s wrong here. Any ideas on how to further debug or solve this?

Thank you
Felix