ADC_MODE(ADC_VCC); crash compiler

[pandacriss]

NTPClient.ino example (https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266WiFi/examples/NTPClient/NTPClient.ino) wont compile if i add ADC_MODE(ADC_VCC); at the beginning of the sketch. others examples compile normally

it print the following error messages:

NTPClient:132: error: 'IPAddress' was not declared in this scope
unsigned long sendNTPpacket(IPAddress& address)
^
NTPClient:132: error: 'address' was not declared in this scope
unsigned long sendNTPpacket(IPAddress& address)
^
/tmp/arduino_modified_sketch_868703/NTPClient.ino: In function 'void loop()':
NTPClient:76: error: 'sendNTPpacket' cannot be used as a function
sendNTPpacket(timeServerIP); // send an NTP packet to a time server
^
/tmp/arduino_modified_sketch_868703/NTPClient.ino: In function 'long unsigned int sendNTPpacket(IPAddress&)':
NTPClient:132: error: 'long unsigned int sendNTPpacket(IPAddress&)' redeclared as different kind of symbol
unsigned long sendNTPpacket(IPAddress& address)
^
NTPClient:132: error: previous declaration of 'long unsigned int sendNTPpacket'
unsigned long sendNTPpacket(IPAddress& address)
^
exit status 1
'IPAddress' was not declared in this scope

if i comment/delete the ADC_MODE(ADC_VCC); it compiles again

Hardware

nodeMCU ESP-12 80mhz
arduino ide 1.6.13
esp8266 libs 2.3.0
linuxmint 64 bits

[pandacriss]

BTW why is sendNTPpacket() declared as unsigned long if it wont return anything?
line 131: unsigned long sendNTPpacket(IPAddress& address)

[pandacriss]

i found a workaround, thanks to tamptus in this thread #1759

I had the same Problem with : ADC_MODE(ADC_VCC); and Version 1.6.8
My workaround:
Add a new Tab with file adc.h
with one line:
ADC_MODE(ADC_VCC)
add
#include "adc.h"
as first include in first tab.

[devyte]

@pandacriss this is not an issue with latest git. Just make sure to place the macro at global scope outside of any function.
Closing.