Microsoft (R) Program Maintenance Utility Version 7.00.8882 Copyright (C) Microsoft Corp 1988-2000. All rights reserved. cp GUITest.pm blib\lib\X11\GUITest.pm AutoSplitting blib\lib\X11\GUITest.pm (blib\lib\auto\X11\GUITest) C:\cpanrun-5.8\build\5-8-0\bin\perl.exe C:\cpanrun-5.8\build\5-8-0\lib\ExtUtils/xsubpp -typemap C:\cpanrun-5.8\build\5-8-0\lib\ExtUtils\typemap -typemap typemap GUITest.xs > GUITest.xsc && C:\cpanrun-5.8\build\5-8-0\bin\perl.exe -MExtUtils::Command -e mv GUITest.xsc GUITest.c cl -c -I/usr/X11R6/include -Werror -MD -Zi -DNDEBUG -O1 -DVERSION=\"0.10\" -DXS_VERSION=\"0.10\" "-IC:\cpanrun-5.8\build\5-8-0\lib\CORE" -DNDEBUG GUITest.c Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 Copyright (C) Microsoft Corp 1984-1998. All rights reserved. Command line error D2021 : invalid numeric argument '/Werror' NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop.