add deps to build irssi; add darshan-dev role

roles/common/tasks/darshan-dev.yml

@@ -0,0 +1,12 @@
+---
+- name: install prerequisite software for Darshan development
+  apt:
+    name="{{ item }}"
+    state=present
+    update_cache=yes
+  with_items:
+    - mpich
+    - zlib1g-dev
+    - autoconf
+  tags:
+    - sw

roles/common/tasks/main.yml

@@ -82,6 +82,8 @@
 - include: software.yml
 - include: users.yml
 - include: raspi-config.yml
+- include: darshan-dev.yml
+  when: "'darshan_dev' in myconfig and myconfig.darshan_dev"
 
 # Configure firewall
 - name: allow SSH through UFW