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In `sic_repl.c' (13) there is a loop for reading strings typed by the user , evaluating them and printing the results. GNU readline is ideally suited to this, but it is not always available -- or sometimes people simply may not wish to use it.
With the help of GNU Autotools, it is very easy to cater for building with and without GNU readline. `sic_repl.c' uses this function to read lines of input from the user:
To make this work, I must write an Autoconf macro which adds an option to `configure' , so that when the package is installed, it will use the readline library if `--with-readline' is used:
Having put this macro in the file `config/readline.m4' , I must also call the new macro (