require returns true on success, and string-eval eats memory :) 
BEGIN { $is_magick = eval {require Image::Magick;}; }


C:\>perl -e"print require CGI;"
1
C:\>perl -e"print require CGIshamalamadingdong;"
Can't locate CGIshamalamadingdong.pm in @INC

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In reply to Re^2: disable functions if module not installed by Anonymous Monk
in thread disable functions if module not installed by lepetitalbert

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