RE: undefined reference to `vtable for cxxabiv1::si_class_type_info'

Ron — Wed, 16 Jan 2019 02:04:54 GMT

OK. I've got this sorted. Turns out the two issues are unrelated:

Turning off RTTI support (which I don't need) gets rid of the undefined reference.

The vtable problem arose from the fact that I was trying to call the derived class method from within the base class constructor - i.e. before the derived class was fully constructed. Crap. I used to know that :-$

Refactoring this flow out of the base ctor and calling it explicitly after the derived class was constructed resolved the issue.

Apart from that, in case it helps anybody else, here are the other issues I faced and how they were resolved:

1. C "_Static_assert" vs. C++ "static_assert"

In app_util.h:

#ifdef __cplusplus
#define STATIC_ASSERT_SIMPLE(EXPR)      static_assert(EXPR, "unspecified message")
#define STATIC_ASSERT_MSG(EXPR, MSG)    static_assert(EXPR, MSG)
#else
#define STATIC_ASSERT_SIMPLE(EXPR)      _Static_assert(EXPR, "unspecified message")
#define STATIC_ASSERT_MSG(EXPR, MSG)    _Static_assert(EXPR, MSG)
#endif

2. Beyond that, there are many cases of C++ not liking this style of C struct initialization:

#define GPIOTE_CONFIG_OUT_SIMPLE(init_high)                                                        \
    {                                                                                              \
        .init_state = init_high ? NRF_GPIOTE_INITIAL_VALUE_HIGH : NRF_GPIOTE_INITIAL_VALUE_LOW,    \
        .task_pin = false,                                                                         \
    }
#endif

I solved this by adding a constructor to the struct:

#ifdef __cplusplus
typedef struct nrf_drv_gpiote_out_config_t_struct
{
    nrf_drv_gpiote_out_config_t_struct( nrf_gpiote_polarity_t polarity, nrf_gpiote_outinit_t state, bool isTaskPin )
        : action( polarity ), init_state( state ), task_pin( isTaskPin) {}
#else        
typedef struct 
{
#endif
    nrf_gpiote_polarity_t action;    /**< Configuration of the pin task. */
    nrf_gpiote_outinit_t  init_state; /**< Initial state of the output pin. */
    bool                  task_pin;  /**< True if the pin is controlled by a GPIOTE task. */
} nrf_drv_gpiote_out_config_t;

and changing the define to a constructor call:

/**@brief Macro for configuring a pin to use as output. GPIOTE is not used for the pin. */
#if defined __cplusplus
#define GPIOTE_CONFIG_OUT_SIMPLE(init_high) nrf_drv_gpiote_out_config_t_struct(                    \
											NRF_GPIOTE_POLARITY_LOTOHI,                            \
                                            init_high ? NRF_GPIOTE_INITIAL_VALUE_HIGH : NRF_GPIOTE_INITIAL_VALUE_LOW, \
                                            false )
#else
#define GPIOTE_CONFIG_OUT_SIMPLE(init_high)                                                        \
    {                                                                                              \
        .init_state = init_high ? NRF_GPIOTE_INITIAL_VALUE_HIGH : NRF_GPIOTE_INITIAL_VALUE_LOW,    \
        .task_pin = false,                                                                         \
    }
#endif

undefined reference to `vtable for __cxxabiv1::__si_class_type_info'

RE: undefined reference to `vtable for __cxxabiv1::__si_class_type_info'

undefined reference to `vtable for cxxabiv1::si_class_type_info'

RE: undefined reference to `vtable for cxxabiv1::si_class_type_info'