There is an updated pull request by pullmoll against master on the void-packages repository

https://github.com/pullmoll/void-packages ccache
https://github.com/void-linux/void-packages/pull/25724

ccache: update to 4.0
This release changes from using autoconf to cmake which is why
we need to remove the bootstrap=yes (N.B.: cmake is not bootstrap=yes).

I think we cannot turn `cmake` into a `bootstrap=yes` package.
Should we create a (legacy) chroot-ccache with a < 4.0 version?

There seems to be no way to build `ccache` >= 4.0 with just autoconf.

A patch file from https://github.com/void-linux/void-packages/pull/25724.patch is attached