anchor.diff:  set PATH=%MINGW64%;%PATH%
   echo|set /p=64-bit ffi testing ...
   ld -r -b binary -o tmp/repl64.o repl
  -%CC% -std=c99 -g3 -Wall -fmessage-length=0 -Wno-strict-aliasing -I src ^
  +%CC% -std=c99 -g3 -O0 -Wall -fmessage-length=0 -Wno-strict-aliasing -I src ^
       -DHAS_PINVOKE=1 ^
  -    src/olvm.c tmp/repl64.o tests/ffi.c -Iwin32 -o "test-ffi64.exe" -lws2_32 -O2 -g2 -m64
  +    src/olvm.c tmp/repl64.o tests/ffi.c -Iwin32 -o "test-ffi64.exe" -lws2_32 -m64
   test-ffi64.exe tests/ffi.scm > C:\TEMP\out
   fc C:\TEMP\out tests/ffi.scm.ok > nul
   if errorlevel 1 (
  
positive.code: :: internal
  set PATH=%MINGW32%;%PATH%
  echo 32-bit internal test:
  %CC% -std=c99 -g0 -O2 -Wall -fmessage-length=0 -fno-exceptions -Wno-strict-aliasing -DNAKED_VM ^
     src/olvm.c tests/vm.c -Iwin32 -o "test-vm32.exe" -lws2_32 -DEMBEDDED_VM=1 -m32 -DNDEBUG -s -Iinclude
  test-vm32.exe
  if errorlevel 1 goto fail
  
  set PATH=%PATH~%
  set PATH=%MINGW64%;%PATH%
  echo 64-bit internal test:
  %CC% -std=c99 -g0 -O2 -Wall -fmessage-length=0 -fno-exceptions -Wno-strict-aliasing -DNAKED_VM ^
     src/olvm.c tests/vm.c -Iwin32 -o "test-vm64.exe" -lws2_32 -DEMBEDDED_VM=1 -m64 -DNDEBUG -s -Iinclude
  test-vm64.exe
  if errorlevel 1 goto fail
  
  
negative.code: echo.   *** Making 64-bit virtual machine:
  set PATH=%MINGW64%;%PATH%
  
  %CC% -std=c99 -g3 -O0 -Wall -fmessage-length=0 -fno-exceptions -Wno-strict-aliasing -DNAKED_VM ^
     src/olvm.c -Iwin32 -o "vm64.exe" -lws2_32 -m64
  
  set PATH=%PATH~%
  GOTO:EOF
  