Since it's impossible to build Python using VC7.1 on a command.com
system, exploit cmd.exe's setlocal function in this directory.
diff --git a/PCbuild/rt.bat b/PCbuild/rt.bat
index b3216f7..a5b2e5e 100755
--- a/PCbuild/rt.bat
+++ b/PCbuild/rt.bat
@@ -15,10 +15,10 @@
@rem runs
@rem python_d ../lib/test/regrtest.py -g test_binascii
@rem to generate the expected-output file for binascii quickly.
+@setlocal
@set _exe=python
@set _qmode=no
@set _dashO=
-@set _oldpath=%PATH%
@PATH %PATH%;..\..\tcltk\bin
@goto CheckOpts
:Again
@@ -38,8 +38,3 @@
@pause
:Qmode
%_exe% %_dashO% -E -tt ../lib/test/regrtest.py %1 %2 %3 %4 %5 %6 %7 %8 %9
-@set _exe=
-@set _qmode=
-@set _dashO=
-@PATH %_oldpath%
-@set _oldpath=