undefined reference to rtc_isr_register which exists in libdriver.a(rtc_module) While other functions in it are available #3149
Description
sketch/ESP32_BLE.ino.cpp.o:(.literal._Z18app_main_start_ulpv+0x70): undefined reference to rtc_isr_register(void (*)(void*), void*, unsigned int)' sketch/ESP32_BLE.ino.cpp.o: In function app_main_start_ulp()':
/Users/londonxue/Documents/Arduino/ESP32_BLE/ESP32_BLE.ino:90: undefined reference to `rtc_isr_register(void ()(void), void*, unsigned int)'
collect2: error: ld returned 1 exit status
exit status 1
Error compiling for board ESP32 Wrover Module.
static void ulp_isr_install()
{
ESP_ERROR_CHECK(rtc_isr_register(ulp_isr_handler, NULL, RTC_CNTL_ULP_CP_INT_ENA_M));
REG_SET_BIT(RTC_CNTL_INT_ENA_REG, RTC_CNTL_ULP_CP_INT_ENA_M);
}