在utop中将camlp4替换为camlp5

Question

我正在使用需要OCaml的camlp5代码；但是，toplevel (我使用的是乌托普)会自动加载更新的、不兼容的camlp4。这些是启动消息：

Findlib has been successfully loaded. Additional directives:
   #require "package";;      to load a package
   #list;;                   to list the available packages
   #camlp4o;;                to load camlp4 (standard syntax)
   #camlp4r;;                to load camlp4 (revised syntax)
   #predicates "p,q,...";;   to set these predicates
   Topfind.reset();;         to force that packages will be reloaded
   #thread;;                 to enable threads

使用的.ocamlinit im如下所示：

#use "topfind";;
#thread;;

我用opam安装了opam，当我发出ocamlfind list时它就会显示出来；文件camlp5.cma也位于/home/<username>/.opam/4.02.1/lib/camlp5/camlp5.cma中。但是试图加载camlp5o和camlp5r的Unknown directive camlp5o失败了。

如何使utop知道camlp5，以及如何将camlp4替换为camlp5作为默认的预处理器？

事先非常感谢！

Answer 1

$ ocaml
    OCaml version 4.02.1

Findlib has been successfully loaded. Additional directives:
  #require "package";;      to load a package
  #list;;                   to list the available packages
  #camlp4o;;                to load camlp4 (standard syntax)
  #camlp4r;;                to load camlp4 (revised syntax)
  #predicates "p,q,...";;   to set these predicates
  Topfind.reset();;         to force that packages will be reloaded
  #thread;;                 to enable threads

# #require "camlp5";;
/home/kakadu/.opam/4.02.1/lib/camlp5: added to search path
# #load "camlp5o.cma";;
    Camlp5 parsing version 6.12

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