Function svn_io_make_dir_recursively 

pub unsafe extern "C" fn svn_io_make_dir_recursively(
    path: *const c_char,
    pool: *mut apr_pool_t,
) -> *mut svn_error_t

Create directory @a path on the file system, creating intermediate directories as required, like mkdir -p. Report no error if @a path already exists. @a path is utf8-encoded.

This is essentially a wrapper for apr_dir_make_recursive(), passing @c APR_OS_DEFAULT as the permissions.