Exposing dagmc support through the capi.

include/openmc/dagmc.h

@@ -1,9 +1,9 @@
 
-#ifdef DAGMC
-
 #ifndef OPENMC_DAGMC_H
 #define OPENMC_DAGMC_H
 
+#ifdef DAGMC
+
 #include "DagMC.hpp"
 #include "openmc/cell.h"
 #include "openmc/surface.h"
@@ -20,3 +20,5 @@ extern "C" void free_memory_dagmc();
 #endif // OPENMC_DAGMC_H
 
 #endif
+
+extern "C" bool dagmc_enabled();

openmc/capi/__init__.py

@@ -38,6 +38,8 @@ else:
     from unittest.mock import Mock
     _dll = Mock()
 
+__dagmc_enabled__ = bool(_dll.dagmc_enabled())
+    
 from .error import *
 from .core import *
 from .nuclide import *

src/dagmc.cpp

@@ -142,3 +142,13 @@ void free_memory_dagmc()
 
 }
 #endif
+
+bool dagmc_enabled()
+{
+#ifdef DAGMC
+  return true;
+#else
+  return false;
+#endif
+}
+

tests/regression_tests/dagmc/test.py

@@ -1,9 +1,10 @@
 from tests.testing_harness import TestHarness
 import os
 import pytest
+import openmc
 
 pytestmark = pytest.mark.skipif(
-    os.environ.get('DAGMC') != 'y',
+    not openmc.capi.__dagmc_enabled__,
     reason="DAGMC CAD geometry is not enabled.")
 
 def test_dagmc():