#define SILC_VERIFY(experssion)

    Verification macro that prints error message to stderr and calls
    abort() if the `expression' is false (ie. compares equal to zero)
    on debug builds (SILC_DEBUG defined), and prints error message to
    stderr on release builds (SILC_DEBUG undefined) but does not abort().
    This macro is always compiled even if debugging (SILC_DEBUG) is not
    defined.

    #if defined(SILC_DEBUG)
    #define SILC_VERIFY(expr) assert((expr))
    #else
    #define SILC_VERIFY(expr)                                               \
      if (!(expr))                                                          \
        SILC_LOG_ERROR(("SILC_VERIFY %s:%d", __FUNCTION__, __LINE__))
    #endif /* SILC_DEBUG */