[perl] проверить установлен ли модуль

[23:56:22][aitap@Tarkus ~]> perl -e 'eval { require MyCoolModule } or do { warn "Sorry, feautures provided by MyCoolModule will be disabled\n" };'
Sorry, feautures provided by MyCoolModule will be disabled
[23:57:03][aitap@Tarkus ~]> 

eval { require My::Module; }; 
warn $@ if $@;