Using fopen, fseek, fwrite, ... with nRF connect SDK 1.7.0

Dear ,

Just wondering whether the above file operation functions can be directly called and used with the nRF connect SDK, as I am integrating an existing lib to my nRF connect project?

I include the header file <stdio.h> in the source file, where these functions are used, but still gets errors for implicit declarations of function.

Could you please kindly advise?

Kind regards, Kevin

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