I have a problem installin miRDeep2

[Black_data_ho]

Hello I want use miRDeep2 on my mac (Yoseimite).
So I downloaded miRDeep2 on https://www.mdc-berlin.de/8551903/en/

I open iterm and change dir to Download/mirdeep2
type ./install.pl

but there are error message like this :

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Use of uninitialized value $new in pattern match (m//) at ./install.pl line 20.
making backup of .bashrc,.bash_profile and .cshrc and removing all entries of mirdeep in those files
~/.bashrc backup is ~/.bashrc_1454562646
~/.bash_profile backup is ~/.bash_profile_1454562646
file /Users/XXXX/.cshrc.bak not found

Error:
no gcc compiler installed. Please install a gcc compiler
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

but I already installed gcc...;;
how can I solve this problem??

[GenoMax]

What do you get when you type

$ which gcc

Have you installed the command line tools for Xcode?