Checking if your kit is complete...
Looks good
Writing Makefile for libcal
Writing Makefile for UNIX::Cal

Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.

cp Cal.pm blib\lib\UNIX\Cal.pm
	nmake -f Makefile all -nologo
	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=\"\"  -DXS_VERSION=\"\"  "-IC:\cpanrun\build\5-10-0\lib\CORE"   cal.c
cal.c
cal.c(58) : fatal error C1083: Cannot open include file: '/usr/include/_G_config.h': No such file or directory
NMAKE : fatal error U1077: 'cl' : return code '0x2'
Stop.
NMAKE : fatal error U1077: 'C:\PROGRA~1\MICROS~3\VC98\BIN\nmake.exe' : return code '0x2'
Stop.