sdk_v1.1.0_15_05_22 : undefined ref user_rf_pre_init

[rudi]

hi

the compiler breaks with undefined reference to 'user_rf_pre_init' in the at app example.

think,
the funcion in user_main.c

void user_rf_pre_init(void) {
}

makes fail without a define

void user_rf_pre_init(void);

at begin in user_main.c



hint: libmain.a
function: user_uart_wait_tx_fifo_empty



best wishes
rudi

[harrys]

I can confirm the same issue

/opt/Espressif/ESP8266_SDK_1.1.0/lib/libmain.a(app_main.o): In function `user_uart_wait_tx_fifo_empty':
(.irom0.text+0x34c): undefined reference to `user_rf_pre_init'
/opt/Espressif/ESP8266_SDK_1.1.0/lib/libmain.a(app_main.o): In function `user_uart_wait_tx_fifo_empty':
(.irom0.text+0x474): undefined reference to `user_rf_pre_init'
collect2: error: ld returned 1 exit status
make: *** [build/test.out] Error 1

code compiles ok with SDK 1.0.1

Regards, Harry

[hdrut]

I confirm the issue.


/home/esp8266/Projects/esp_iot_sdk_v1.1.0/lib/libmain.a(app_main.o): In function `user_uart_wait_tx_fifo_empty':
(.irom0.text+0x34c): undefined reference to `user_rf_pre_init'


Any fix for this??

thks ,rgds

[ESP_Faye]

Hi，

Since SDK_v1.1.0 , user_rf_pre_init is added for user-define RF initialization.

Users need to add void user_rf_pre_init(void) in user_main.c , refer to IOT_Demo (user_main.c)

So sorry for the inconvenience.

[hdrut]

Thanks, that did the trick !!

[harrys]

Thanks, working again

[rudi]

Hi，

Since SDK_v1.1.0 , user_rf_pre_init is added for user-define RF initialization.

Users need to add void user_rf_pre_init(void) in user_main.c , refer to IOT_Demo (user_main.c)

So sorry for the inconvenience.

..
makes fail without a define

void user_rf_pre_init(void);

at begin in user_main.c

yes you are right

[dkinzer]

Users need to add void user_rf_pre_init(void) in user_main.c , refer to IOT_Demo (user_main.c).

I realize that this is a thread from several months ago but it has been bugging me since the requirement was introduced. The "proper" way to handle something like this is to define a do-nothing stub with the name user_rf_pre_init() as a weak symbol in the module that calls user_rf_pre_init(). Then, if an application author wants to perform such pre-initialization they would just define the function normally (i.e., not weak) and it will automatically replace the weak stub.

https://en.wikipedia.org/wiki/Weak_symbol

The advantage to doing it the "right" way is that it has no effect on anyone who has no interest in using the feature *and* it doesn't break existing code.