c-make-styles-buffer-local is a compiled Lisp function in `cc-styles.el'.

(c-make-styles-buffer-local &optional THIS-BUF-ONLY-P)

Make all CC Mode style variables buffer local.
If `this-buf-only-p' is non-nil, the style variables will be made
buffer local only in the current buffer. Otherwise they'll be made
permanently buffer local in any buffer that changes their values.

The buffer localness of the style variables are normally controlled
with the variable `c-style-variables-are-local-p', so there's seldom
any reason to call this function directly.