Checking if your kit is complete... Looks good Writing Makefile for Socket::MsgHdr Microsoft (R) Program Maintenance Utility Version 6.00.8168.0 Copyright (C) Microsoft Corp 1988-1998. All rights reserved. cp MsgHdr.pm blib\lib\Socket\MsgHdr.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 MsgHdr.xs > MsgHdr.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv MsgHdr.xsc MsgHdr.c cl -c -I. -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=\"0.01\" -DXS_VERSION=\"0.01\" "-IC:\cpanrun\build\5-10-0\lib\CORE" MsgHdr.c MsgHdr.c MsgHdr.xs(20) : error C2079: 'm' uses undefined struct 'msghdr' MsgHdr.xs(21) : error C2079: 'io' uses undefined struct 'iovec' MsgHdr.xs(38) : error C2224: left of '.msg_iov' must have struct/union type MsgHdr.xs(39) : error C2224: left of '.msg_iovlen' must have struct/union type MsgHdr.xs(42) : error C2224: left of '.msg_name' must have struct/union type MsgHdr.xs(43) : error C2224: left of '.msg_namelen' must have struct/union type MsgHdr.xs(47) : error C2224: left of '.iov_base' must have struct/union type MsgHdr.xs(48) : error C2224: left of '.iov_len' must have struct/union type MsgHdr.xs(52) : error C2224: left of '.msg_control' must have struct/union type MsgHdr.xs(53) : error C2224: left of '.msg_controllen' must have struct/union type MsgHdr.xs(57) : error C2224: left of '.msg_flags' must have struct/union type MsgHdr.xs(75) : warning C4013: 'CMSG_SPACE' undefined; assuming extern returning int MsgHdr.xs(85) : error C2037: left of 'cmsg_len' specifies undefined struct/union 'cmsghdr' MsgHdr.xs(85) : warning C4013: 'CMSG_LEN' undefined; assuming extern returning int MsgHdr.xs(86) : error C2037: left of 'cmsg_level' specifies undefined struct/union 'cmsghdr' MsgHdr.xs(87) : error C2037: left of 'cmsg_type' specifies undefined struct/union 'cmsghdr' MsgHdr.xs(88) : warning C4013: 'CMSG_DATA' undefined; assuming extern returning int MsgHdr.xs(98) : error C2079: 'dummy' uses undefined struct 'msghdr' MsgHdr.xs(102) : error C2224: left of '.msg_control' must have struct/union type MsgHdr.xs(103) : error C2224: left of '.msg_controllen' must have struct/union type MsgHdr.xs(108) : warning C4013: 'CMSG_FIRSTHDR' undefined; assuming extern returning int MsgHdr.xs(108) : warning C4047: '=' : 'struct cmsghdr *' differs in levels of indirection from 'int ' MsgHdr.xs(109) : warning C4013: 'CMSG_NXTHDR' undefined; assuming extern returning int MsgHdr.xs(109) : warning C4047: '=' : 'struct cmsghdr *' differs in levels of indirection from 'int ' MsgHdr.xs(110) : error C2037: left of 'cmsg_level' specifies undefined struct/union 'cmsghdr' MsgHdr.xs(110) : error C2198: 'Perl_newSViv' : too few actual parameters MsgHdr.xs(111) : error C2037: left of 'cmsg_type' specifies undefined struct/union 'cmsghdr' MsgHdr.xs(111) : error C2198: 'Perl_newSViv' : too few actual parameters MsgHdr.xs(113) : warning C4047: 'function' : 'const char *' differs in levels of indirection from 'int ' MsgHdr.xs(113) : warning C4024: 'Perl_newSVpvn' : different types for formal and actual parameter 2 MsgHdr.xs(113) : error C2037: left of 'cmsg_len' specifies undefined struct/union 'cmsghdr' MsgHdr.xs(113) : error C2198: 'Perl_newSVpvn' : too few actual parameters MsgHdr.xs(127) : warning C4013: 'sendmsg' undefined; assuming extern returning int MsgHdr.xs(144) : warning C4013: 'recvmsg' undefined; assuming extern returning int MsgHdr.xs(151) : error C2224: left of '.msg_namelen' must have struct/union type MsgHdr.xs(155) : error C2224: left of '.msg_controllen' must have struct/union type NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop.