When byte-compiling ztree, I get the following warnings:
In end of data:
ztree-diff-model.el:407:1:Warning: the following functions might not be
defined at runtime: cl-reduce, cl-delete
ztree-dir.el
In end of data:
ztree-view.el:811:1:Warning: the function ‘cl-remove-if’ might not be defined
at runtime.
When byte-compiling ztree, I get the following warnings: