Hi Nubee here. I was following the instructions in the book and I got this error when I installing sqlite3-ruby.

Building native extensions. This could take a while...
Successfully installed sqlite3-ruby-1.2.5
1 gem installed
Installing ri documentation for sqlite3-ruby-1.2.5...

No definition for _wrap_new_CallbackData

No definition for _wrap_CallbackData_proc_set

No definition for _wrap_CallbackData_proc_get

No definition for _wrap_CallbackData_proc2_set

No definition for _wrap_CallbackData_proc2_get

No definition for _wrap_CallbackData_data_set

No definition for _wrap_CallbackData_data_get

No definition for _wrap_sqlite3_libversion

No definition for _wrap_sqlite3_close

No definition for _wrap_sqlite3_last_insert_rowid

No definition for _wrap_sqlite3_changes

No definition for _wrap_sqlite3_total_changes

No definition for _wrap_sqlite3_interrupt

No definition for _wrap_sqlite3_complete

No definition for _wrap_sqlite3_complete16

No definition for _wrap_sqlite3_busy_handler

No definition for _wrap_sqlite3_busy_timeout

No definition for _wrap_sqlite3_set_authorizer

No definition for _wrap_sqlite3_trace

No definition for _wrap_sqlite3_open

No definition for _wrap_sqlite3_open16

No definition for _wrap_sqlite3_errcode

No definition for _wrap_sqlite3_errmsg

No definition for _wrap_sqlite3_errmsg16

No definition for _wrap_sqlite3_prepare

No definition for _wrap_sqlite3_prepare16

No definition for _wrap_sqlite3_bind_blob

No definition for _wrap_sqlite3_bind_double

No definition for _wrap_sqlite3_bind_int

No definition for _wrap_sqlite3_bind_int64

No definition for _wrap_sqlite3_bind_null

No definition for _wrap_sqlite3_bind_text

No definition for _wrap_sqlite3_bind_text16

No definition for _wrap_sqlite3_bind_parameter_count

No definition for _wrap_sqlite3_bind_parameter_name

No definition for _wrap_sqlite3_bind_parameter_index

No definition for _wrap_sqlite3_column_count

No definition for _wrap_sqlite3_column_name

No definition for _wrap_sqlite3_column_name16

No definition for _wrap_sqlite3_column_decltype

No definition for _wrap_sqlite3_column_decltype16

No definition for _wrap_sqlite3_step

No definition for _wrap_sqlite3_data_count

No definition for _wrap_sqlite3_column_blob

No definition for _wrap_sqlite3_column_bytes

No definition for _wrap_sqlite3_column_bytes16

No definition for _wrap_sqlite3_column_double

No definition for _wrap_sqlite3_column_int

No definition for _wrap_sqlite3_column_int64

No definition for _wrap_sqlite3_column_text

No definition for _wrap_sqlite3_column_text16

No definition for _wrap_sqlite3_column_type

No definition for _wrap_sqlite3_finalize

No definition for _wrap_sqlite3_reset

No definition for _wrap_sqlite3_create_function

No definition for _wrap_sqlite3_create_function16

No definition for _wrap_sqlite3_aggregate_count

No definition for _wrap_sqlite3_value_blob

No definition for _wrap_sqlite3_value_bytes

No definition for _wrap_sqlite3_value_bytes16

No definition for _wrap_sqlite3_value_double

No definition for _wrap_sqlite3_value_int

No definition for _wrap_sqlite3_value_int64

No definition for _wrap_sqlite3_value_text

No definition for _wrap_sqlite3_value_text16

No definition for _wrap_sqlite3_value_text16le

No definition for _wrap_sqlite3_value_text16be

No definition for _wrap_sqlite3_value_type

No definition for _wrap_sqlite3_result_blob

No definition for _wrap_sqlite3_result_double

No definition for _wrap_sqlite3_result_error

No definition for _wrap_sqlite3_result_error16

No definition for _wrap_sqlite3_result_int

No definition for _wrap_sqlite3_result_int64

No definition for _wrap_sqlite3_result_text

No definition for _wrap_sqlite3_result_text16

No definition for _wrap_sqlite3_result_text16le

No definition for _wrap_sqlite3_result_text16be

No definition for _wrap_sqlite3_result_value

No definition for _wrap_sqlite3_aggregate_context
Installing RDoc documentation for sqlite3-ruby-1.2.5...

No definition for _wrap_new_CallbackData

No definition for _wrap_CallbackData_proc_set

No definition for _wrap_CallbackData_proc_get

No definition for _wrap_CallbackData_proc2_set

No definition for _wrap_CallbackData_proc2_get

No definition for _wrap_CallbackData_data_set

No definition for _wrap_CallbackData_data_get

No definition for _wrap_sqlite3_libversion

No definition for _wrap_sqlite3_close

No definition for _wrap_sqlite3_last_insert_rowid

No definition for _wrap_sqlite3_changes

No definition for _wrap_sqlite3_total_changes

No definition for _wrap_sqlite3_interrupt

No definition for _wrap_sqlite3_complete

No definition for _wrap_sqlite3_complete16

No definition for _wrap_sqlite3_busy_handler

No definition for _wrap_sqlite3_busy_timeout

No definition for _wrap_sqlite3_set_authorizer

No definition for _wrap_sqlite3_trace

No definition for _wrap_sqlite3_open

No definition for _wrap_sqlite3_open16

No definition for _wrap_sqlite3_errcode

No definition for _wrap_sqlite3_errmsg

No definition for _wrap_sqlite3_errmsg16

No definition for _wrap_sqlite3_prepare

No definition for _wrap_sqlite3_prepare16

No definition for _wrap_sqlite3_bind_blob

No definition for _wrap_sqlite3_bind_double

No definition for _wrap_sqlite3_bind_int

No definition for _wrap_sqlite3_bind_int64

No definition for _wrap_sqlite3_bind_null

No definition for _wrap_sqlite3_bind_text

No definition for _wrap_sqlite3_bind_text16

No definition for _wrap_sqlite3_bind_parameter_count

No definition for _wrap_sqlite3_bind_parameter_name

No definition for _wrap_sqlite3_bind_parameter_index

No definition for _wrap_sqlite3_column_count

No definition for _wrap_sqlite3_column_name

No definition for _wrap_sqlite3_column_name16

No definition for _wrap_sqlite3_column_decltype

No definition for _wrap_sqlite3_column_decltype16

No definition for _wrap_sqlite3_step

No definition for _wrap_sqlite3_data_count

No definition for _wrap_sqlite3_column_blob

No definition for _wrap_sqlite3_column_bytes

No definition for _wrap_sqlite3_column_bytes16

No definition for _wrap_sqlite3_column_double

No definition for _wrap_sqlite3_column_int

No definition for _wrap_sqlite3_column_int64

No definition for _wrap_sqlite3_column_text

No definition for _wrap_sqlite3_column_text16

No definition for _wrap_sqlite3_column_type

No definition for _wrap_sqlite3_finalize

No definition for _wrap_sqlite3_reset

No definition for _wrap_sqlite3_create_function

No definition for _wrap_sqlite3_create_function16

No definition for _wrap_sqlite3_aggregate_count

No definition for _wrap_sqlite3_value_blob

No definition for _wrap_sqlite3_value_bytes

No definition for _wrap_sqlite3_value_bytes16

No definition for _wrap_sqlite3_value_double

No definition for _wrap_sqlite3_value_int

No definition for _wrap_sqlite3_value_int64

No definition for _wrap_sqlite3_value_text

No definition for _wrap_sqlite3_value_text16

No definition for _wrap_sqlite3_value_text16le

No definition for _wrap_sqlite3_value_text16be

No definition for _wrap_sqlite3_value_type

No definition for _wrap_sqlite3_result_blob

No definition for _wrap_sqlite3_result_double

No definition for _wrap_sqlite3_result_error

No definition for _wrap_sqlite3_result_error16

No definition for _wrap_sqlite3_result_int

No definition for _wrap_sqlite3_result_int64

No definition for _wrap_sqlite3_result_text

No definition for _wrap_sqlite3_result_text16

No definition for _wrap_sqlite3_result_text16le

No definition for _wrap_sqlite3_result_text16be

No definition for _wrap_sqlite3_result_value

No definition for _wrap_sqlite3_aggregate_context

I have a mac os x 10.5.8, rails 2.0.2, ruby 1.8.6 and sqlite 3.5.4. I have no idea about this error and how would this affect the examples/project in the book. please help. thanks!