The preprocessor macro `STDC_HEADERS' is obsolete.

[cicci]

Hi everyone,
I am trying to install Raspa2.0 on my PC (SO. Windows) and utilizing Ubuntu 24.01.1 for windows. COnsidering the procedure reported in manual, after the installation I obtained the following error message:

The preprocessor macro `STDC_HEADERS' is obsolete.
configure.ac:23:   Except in unusual embedded environments, you can safely include all
configure.ac:23:   ISO C90 headers unconditionally


What can I do to fix this problem? Thanks