replace defines with static constexpr declarations

purge-workflows.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+
+from yaml import load
+import subprocess
+try:
+    from yaml import CLoader as Loader
+except ImportError:
+    from yaml import Loader
+
+runs = subprocess.check_output('gh api repos/lammps/lammps/actions/runs',shell=True)
+data = load(runs,Loader=Loader)
+while data['total_count'] > 3:
+    print('remaining: ', data['total_count'])
+    num=1
+    for d in data['workflow_runs']:
+        print(num, d['id'],d['name'],d['run_number'])
+        num += 1
+        if num > 4:
+            subprocess.call('gh api -X DELETE repos/lammps/lammps/actions/runs/' + str(d['id']), shell=True)
+            #print('gh api -X DELETE repos/lammps/lammps/actions/runs/' + str(d['id']))
+        else:
+            print('skip')
+    runs = subprocess.check_output('gh api repos/lammps/lammps/actions/runs',shell=True)
+    data = load(runs,Loader=Loader)