Avoid the use of 'unset', which isn't available on all platforms. Fixes SF

bug #442627.

diff --git a/Makefile.pre.in b/Makefile.pre.in
index 7fd60a118a3c6c67a20c97adbdacf75d9340c87c..d073c011b849d4dd5dbf85211b3c329fa6b9ba52 100644 (file)
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -286,7 +286,7 @@ platform: $(PYTHON)
 
 # Build the shared modules
 sharedmods: $(PYTHON)
-       unset PYTHONPATH PYTHONHOME PYTHONSTARTUP; \
+       PYTHONPATH= PYTHONHOME= PYTHONSTARTUP= \
                ./$(PYTHON) $(srcdir)/setup.py build
 
 # buildno should really depend on something like LIBRARY_SRC