Changed to Ubuntu 18.04 for newer CMAKE

.cirrus.yml

@@ -3,7 +3,7 @@ task:
   container:
     cpu: 4
     memory: 16
-    dockerfile: .cirrus/Dockerfile.ubuntu16.04
+    dockerfile: .cirrus/Dockerfile.ubuntu18.04
 
   build_script: ./bootstrap.sh && ninja
   test_script: cd ../tests && ./run_tests.py

.cirrus/Dockerfile.ubuntu18.04

@@ -0,0 +1,9 @@
+FROM ubuntu:bionic-20190307
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN set -e -x ;\
+    apt-get -y update ;\
+    apt-get -y upgrade ;\
+    apt-get -y install \
+        build-essential cmake gcc git ninja-build doxygen python3

README.md

@@ -1,4 +1,5 @@
 # PADRING - a padring generator for ASICs
+[![Build Status](https://api.cirrus-ci.com/github/YosysHQ/padring.svg)](https://cirrus-ci.com/github/YosysHQ/padring)
 
 ![](doc/padring.png)
 
@@ -16,7 +17,6 @@ Check out the example in the `example` directory.
 
 The filler cells are auto-detected by the padring program. Should this process fail, the user can add an explicit prefix which will be used to find the filler cells.
 
-
 ## Configuration file
 
 The following commands are available: