From cb87456bf1eb0ca03320548dc342ca1f80e49455 Mon Sep 17 00:00:00 2001
From: litman90 <yairlitman@gmail.com>
Date: Wed, 3 Mar 2021 16:51:57 +0100
Subject: [PATCH] Set CI's os to Ubuntu 18.04 (#180)

* See what happens if we go from O3 to O0

* Dont use the latest os but rather a reliable (older) one

* put back 03 flag to fortran driver and update all workflows to use ubuntu-18.04

* Add yml  updated files
---
 .github/workflows/examples.yml         | 2 +-
 .github/workflows/lint.yml             | 2 +-
 .github/workflows/unit_and_regtest.yml | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/examples.yml b/.github/workflows/examples.yml
index 0f52f7e90..fc2b71e02 100644
--- a/.github/workflows/examples.yml
+++ b/.github/workflows/examples.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         python-version: [3.8.5]
-        os: ["ubuntu-latest"]
+        os: ["ubuntu-18.04"]
 
     runs-on: "${{ matrix.os }}"
     
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 17c030328..200f7d047 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -5,7 +5,7 @@ on: [push, pull_request]
 jobs:
 
   lint:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
diff --git a/.github/workflows/unit_and_regtest.yml b/.github/workflows/unit_and_regtest.yml
index 598aa3714..ac83d003a 100644
--- a/.github/workflows/unit_and_regtest.yml
+++ b/.github/workflows/unit_and_regtest.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         python-version: [3.8.5]
-        os: ["ubuntu-latest"]
+        os: ["ubuntu-18.04"]
 
     runs-on: "${{ matrix.os }}"