strptime build error within new Arduino Core framework v3.0.0

[Lukas-Heiligenbrunner]

A build error occurs with the newest Arduino core version v3.0.0 :

lib/framework/NTPSettingsService.cpp: In member function 'void NTPSettingsService::configureTime(AsyncWebServerRequest*, ArduinoJson::JsonVariant&)':
lib/framework/NTPSettingsService.cpp:78:15: error: 'strptime' was not declared in this scope; did you mean 'strftime'?
   78 |     char* s = strptime(timeLocal.c_str(), "%Y-%m-%dT%H:%M:%S", &tm);
      |               ^~~~~~~~
      |               strftime

This seems to be caused by a disabled prototype.
To fix this you could define your prototype by your own somewhere:

extern "C" char *strptime (const char *__restrict, const char *__restrict, struct tm *__restrict);

--> see esp8266/Arduino#8122

Kind regards.

[rjwats]

Ah, thanks for the issue report! Probably worth adding in the prototype for now like you suggested

…

On Thu, 17 Jun 2021, 16:19 Lukas-Heiligenbrunner, ***@***.***> wrote: A build error occurs with the newest Arduino core version v3.0.0 : lib/framework/NTPSettingsService.cpp: In member function 'void NTPSettingsService::configureTime(AsyncWebServerRequest*, ArduinoJson::JsonVariant&)': lib/framework/NTPSettingsService.cpp:78:15: error: 'strptime' was not declared in this scope; did you mean 'strftime'? 78 | char* s = strptime(timeLocal.c_str(), "%Y-%m-%dT%H:%M:%S", &tm); | ^~~~~~~~ | strftime This seems to be caused by a disabled prototype. To fix this you could define your prototype by your own somewhere: extern "C" char *strptime (const char *__restrict, const char *__restrict, struct tm *__restrict); --> see esp8266/Arduino#8122 <esp8266/Arduino#8122> Kind regards. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#248>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAKE4VC5J3IX6FTH277YTRDTTIHBPANCNFSM4634WHBQ> .

[Lukas-Heiligenbrunner]

This is fixed in esp8266/Arduino#8147 and should be included in the next Arduino Core release.
I doubt if the prototype patch is really necessary.