You copied the Doc URL to your clipboard.

_getenv_init()

Defined in rt_misc.h, this function enables a user version of getenv() to initialize itself. It is not part of the C library standard, but the ARM C library supports it as an extension.

Syntax

void _getenv_init(void);

Usage

If this function is defined, the C library initialization code calls it when the library is initialized, that is, before main() is entered.