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-rw-r--r--src/engine/SCons/Defaults.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/engine/SCons/Defaults.py b/src/engine/SCons/Defaults.py
index f4bd637..07a388e 100644
--- a/src/engine/SCons/Defaults.py
+++ b/src/engine/SCons/Defaults.py
@@ -50,6 +50,12 @@ import SCons.Scanner.C
import SCons.Scanner.Fortran
import SCons.Scanner.Prog
+# A placeholder for a default Environment (for fetching source files
+# from source code management systems and the like). This must be
+# initialized later, after the top-level directory is set by the calling
+# interface.
+_default_env = None
+
def alias_builder(env, target, source):
pass