require Module2
    if  ! eval "require Module1";

[download]

or 

use if !eval("use Module1"), 'Module2';

[download]

but be warned that "You can't use a module's compile-time magic when you conditionally use the module...".

- tye        

In reply to Re: Using the perl modules depends upon the availability of another module. by tye
in thread Using the perl modules depends upon the availability of another module. by jesuashok

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