Remove epicscorelibs.path dependency on ProbeToolchain

Author: coretl

src/python/epicscorelibs/config.py

@@ -9,6 +9,8 @@
 
 from setuptools_dso.probe import ProbeToolchain
 
+from ..os_class import get_os_class
+
 
 __all__ = (
     'get_config_var',
@@ -17,15 +19,7 @@
 
 def _makeconf():
     conf = {}
-
-    # cf. Lib/platform.py in cpython source tree
-
-    # map from python system name to epics OS_CLASS
-    osname = conf['OS_CLASS'] = {
-        'Linux': 'Linux',
-        'Windows': 'WIN32',
-        'Darwin': 'Darwin',
-    }[platform.system()]
+    osname = conf['OS_CLASS'] = get_os_class()
 
     # select epics CMPLR_CLASS
     ID = ProbeToolchain().eval_macros(('__GNUC__', '__clang__', '_MSC_VER'))

src/python/epicscorelibs/os_class.py

@@ -0,0 +1,11 @@
+import platform
+
+def get_os_class():
+    # cf. Lib/platform.py in cpython source tree
+
+    # map from python system name to epics OS_CLASS
+    return {
+        'Linux': 'Linux',
+        'Windows': 'WIN32',
+        'Darwin': 'Darwin',
+    }[platform.system()]

src/python/epicscorelibs/path/__init__.py

@@ -2,7 +2,7 @@
 import os
 from glob import glob
 
-from ..config import get_config_var
+from ..os_class import get_os_class
 from setuptools_dso.runtime import dylink_prepare_dso, find_dso
 
 __all__ = (
@@ -15,7 +15,7 @@
 
 
 # parts of library file names
-OS_CLASS = get_config_var("OS_CLASS")
+OS_CLASS = get_os_class()
 if OS_CLASS=='WIN32':
     _prefix, _suffix = '', '.dll'
 elif OS_CLASS=='Darwin':