Checking if your kit is complete... Looks good Writing Makefile for String::Similarity Microsoft (R) Program Maintenance Utility Version 6.00.8168.0 Copyright (C) Microsoft Corp 1988-1998. All rights reserved. cp Similarity.pm blib\lib\String\Similarity.pm C:\cpanrun\build\5-10-0\bin\perl.exe C:\cpanrun\build\5-10-0\lib\ExtUtils\xsubpp -typemap C:\cpanrun\build\5-10-0\lib\ExtUtils\typemap Similarity.xs > Similarity.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv Similarity.xsc Similarity.c cl -c -nologo -GF -W3 -MD -Zi -DNDEBUG -O1 -DWIN32 -D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT -DUSE_SITECUSTOMIZE -DPRIVLIB_LAST_IN_INC -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DUSE_PERLIO -DPERL_MSVCRT_READFIX -MD -Zi -DNDEBUG -O1 -DVERSION=\"1.03\" -DXS_VERSION=\"1.03\" "-IC:\cpanrun\build\5-10-0\lib\CORE" Similarity.c Similarity.c fstrcmp.h(25) : error C2371: 'CHAR' : redefinition; different basic types C:\PROGRA~1\MICROS~3\VC98\INCLUDE\winnt.h(134) : see declaration of 'CHAR' fstrcmp.c(581) : warning C4028: formal parameter 1 different from declaration fstrcmp.c(581) : warning C4028: formal parameter 3 different from declaration fstrcmp.c(621) : warning C4244: '=' : conversion from 'double ' to 'int ', possible loss of data Similarity.xs(35) : warning C4133: 'return' : incompatible types - from 'unsigned long *' to 'char *' Similarity.xs(51) : warning C4133: 'function' : incompatible types - from 'char *' to 'const unsigned long *' Similarity.xs(51) : warning C4133: 'function' : incompatible types - from 'char *' to 'const unsigned long *' NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop.