Unable to change shell to run command from /bin/sh to /bin/bash

[sangramp]

Hi,

I am using custom make file for commpiling my code. The make file contains few commands which the "sh" shell is unable to execute. Hence i want to change the shell to bash. The option " Settings -> Environment -> GeneralSettings -> Shell to run command in [/bin/sh -c] " is disable and hence i am not able to change the shell. Can any one tell me how do i enable  the option. A immediate reply will be highly appreciated.