i try to use virtual function but it look like the vtable undefined?
here is the error log that shown when build
FAILED: zephyr/zephyr_pre0.elf zephyr/zephyr_pre0.map /workspaces/semudah-nrf-firmware/build/zephyr/zephyr_pre0.map : && ccache /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/arm-zephyr-eabi-g++ zephyr/CMakeFiles/zephyr_pre0.dir/misc/empty_file.c.obj -o zephyr/zephyr_pre0.elf zephyr/CMakeFiles/offsets.dir/./arch/arm/core/offsets/offsets.c.obj -fuse-ld=bfd -Wl,-T zephyr/linker_zephyr_pre0.cmd -Wl,-Map=/workspaces/semudah-nrf-firmware/build/zephyr/zephyr_pre0.map -Wl,--whole-archive app/libapp.a zephyr/libzephyr.a zephyr/arch/common/libarch__common.a zephyr/arch/arch/arm/core/aarch32/libarch__arm__core__aarch32.a zephyr/arch/arch/arm/core/aarch32/cortex_m/libarch__arm__core__aarch32__cortex_m.a zephyr/arch/arch/arm/core/aarch32/mpu/libarch__arm__core__aarch32__mpu.a zephyr/lib/libc/minimal/liblib__libc__minimal.a zephyr/lib/posix/liblib__posix.a zephyr/soc/arm/common/cortex_m/libsoc__arm__common__cortex_m.a zephyr/soc/arm/nordic_nrf/nrf52/libsoc__arm__nordic_nrf__nrf52.a zephyr/drivers/clock_control/libdrivers__clock_control.a zephyr/drivers/console/libdrivers__console.a zephyr/drivers/gpio/libdrivers__gpio.a zephyr/drivers/serial/libdrivers__serial.a zephyr/drivers/timer/libdrivers__timer.a zephyr/drivers/pinctrl/libdrivers__pinctrl.a modules/nrf/lib/fatal_error/lib..__nrf__lib__fatal_error.a modules/hal_nordic/nrfx/libmodules__hal_nordic__nrfx.a modules/segger/libmodules__segger.a -Wl,--no-whole-archive zephyr/kernel/libkernel.a -L"/root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/thumb/v7e-m/nofp" -L/workspaces/semudah-nrf-firmware/build/zephyr -lgcc src/Example/libexample.a src/ButtonInterface/libbutton_interface.a src/Indicator/libindicator.a src/Fsm/libfsm.a src/Pattern/libpattern.a zephyr/arch/common/libisr_tables.a -no-pie -mcpu=cortex-m4 -mthumb -mabi=aapcs -mfp16-format=ieee -Wl,--gc-sections -Wl,--build-id=none -Wl,--sort-common=descending -Wl,--sort-section=alignment -Wl,-u,_OffsetAbsSyms -Wl,-u,_ConfigAbsSyms -nostdlib -static -Wl,-X -Wl,-N -Wl,--orphan-handling=warn && cd /workspaces/semudah-nrf-firmware/build/zephyr && /usr/local/lib/python3.8/dist-packages/cmake/data/bin/cmake -E echo /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab.text._ZN8PollableC2Ev[_ZN8PollableC5Ev]' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab.text._ZN8PollableC2Ev' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab.text._ZN10ObservableC2Ev[_ZN10ObservableC5Ev]' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab.text._ZN10ObservableC2Ev' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab.text._ZN5StateIiEC2Ev[_ZN5StateIiEC5Ev]' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab.text._ZN5StateIiEC2Ev' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab.text._ZN15ObservableStateIiEC2Ev[_ZN15ObservableStateIiEC5Ev]' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab.text._ZN15ObservableStateIiEC2Ev' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab.text._ZN3etl8delegateIFivEE18invocation_elementC2Ev[_ZN3etl8delegateIFivEE18invocation_elementC5Ev]' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab.text._ZN3etl8delegateIFivEE18invocation_elementC2Ev' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab.text._ZN3etl8delegateIFivEEC2Ev[_ZN3etl8delegateIFivEEC5Ev]' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab.text._ZN3etl8delegateIFivEEC2Ev' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab.text._ZN3etl8delegateIFjvEE18invocation_elementC2Ev[_ZN3etl8delegateIFjvEE18invocation_elementC5Ev]' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab.text._ZN3etl8delegateIFjvEE18invocation_elementC2Ev' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab.text._ZN3etl8delegateIFjvEEC2Ev[_ZN3etl8delegateIFjvEEC5Ev]' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab.text._ZN3etl8delegateIFjvEEC2Ev' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab.text._ZNK3etl8delegateIFivEEclEv[_ZNK3etl8delegateIFivEEclEv]' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab.text._ZNK3etl8delegateIFivEEclEv' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab.text._ZNK3etl8delegateIFjvEEclEv[_ZNK3etl8delegateIFjvEEclEv]' from `src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj)' being placed in section `.ARM.extab.text._ZNK3etl8delegateIFjvEEclEv' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `.ARM.extab' from `src/Pattern/libpattern.a(Observer.cpp.obj)' being placed in section `.ARM.extab' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata+0x90): undefined reference to `vtable for __cxxabiv1::__vmi_class_type_info' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata+0xc4): undefined reference to `vtable for __cxxabiv1::__vmi_class_type_info' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata+0xf4): undefined reference to `vtable for __cxxabiv1::__vmi_class_type_info' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.ARM.exidx+0x8): undefined reference to `__aeabi_unwind_cpp_pr1' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.ARM.exidx+0x10): undefined reference to `__aeabi_unwind_cpp_pr0' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.ARM.exidx.text._ZNK3etl8delegateIFivEEclEv[_ZNK3etl8delegateIFivEEclEv]+0x0): undefined reference to `__aeabi_unwind_cpp_pr1' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.ARM.exidx.text._ZNK3etl8delegateIFjvEEclEv[_ZNK3etl8delegateIFjvEEclEv]+0x0): undefined reference to `__aeabi_unwind_cpp_pr1' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata._ZTV15ObservableStateIiE[_ZTV15ObservableStateIiE]+0x8): undefined reference to `__cxa_pure_virtual' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata._ZTV5StateIiE[_ZTV5StateIiE]+0x8): undefined reference to `__cxa_pure_virtual' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata._ZTV8Pollable[_ZTV8Pollable]+0x8): undefined reference to `__cxa_pure_virtual' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata._ZTI15ObservableStateIjE[_ZTI15ObservableStateIjE]+0x0): undefined reference to `vtable for __cxxabiv1::__vmi_class_type_info' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata._ZTI5StateIjE[_ZTI5StateIjE]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata._ZTI15ObservableStateIiE[_ZTI15ObservableStateIiE]+0x0): undefined reference to `vtable for __cxxabiv1::__vmi_class_type_info' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata._ZTI5StateIiE[_ZTI5StateIiE]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata._ZTI8Pollable[_ZTI8Pollable]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata._ZTI8Observer[_ZTI8Observer]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/ButtonInterface/libbutton_interface.a(ButtonInterface.cpp.obj):(.rodata._ZTI10Observable[_ZTI10Observable]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info' /root/zephyr-sdk-0.14.2/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.bfd: src/Pattern/libpattern.a(Observer.cpp.obj):(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr1' collect2: error: ld returned 1 exit status ninja: build stopped: subcommand failed. FATAL ERROR: command exited with status 1: /usr/local/bin/cmake --build /workspaces/semudah-nrf-firmware/build The terminal process terminated with exit code: 1.
