hello,

i would like to use the Str module in a program so i should use camlp4

but when i try the following command

ocamlc -pp "camlp4o pa_extend.cmo" -I +camlp4  main.ml


the following error occurs:

> File "main.ml", line 1, characters 0-1:

Error: Error while linking main.cmo:

Reference to undefined global `Str'


could you help with this error ?
thank by advance

-- 
Grégoire
cell # :  94 82 33 064