in a standard c project in subdirs.mk are reltive paths:
# Each subdirectory must supply rules for building sources it contributes
src/%.o: ../src/%.c
Although relative linked resource used
in a GNU Tools for STM32 for a stm32h7 duale core prozessor project are absolute paths in subdirs.mk:
# Each subdirectory must supply rules for building sources it contributes
Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal.o: C:/home/projekt/CubeMX/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal.c
