Checking if your kit is complete...
Looks good
Writing Makefile for Math::Rand48

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

cp Rand48.pm blib\lib\Math\Rand48.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 -typemap typemap  Rand48.xs > Rand48.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv Rand48.xsc Rand48.c
Please specify prototyping behavior for Rand48.xs (see perlxs manual)
	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=\"1.00\"  -DXS_VERSION=\"1.00\"  "-IC:\cpanrun\build\5-10-0\lib\CORE"   Rand48.c
Rand48.c
Rand48.xs(48) : warning C4305: '=' : truncation from 'const int ' to 'char '
Rand48.c(86) : warning C4013: 'drand48' undefined; assuming extern returning int
Rand48.c(109) : warning C4013: 'erand48' undefined; assuming extern returning int
Rand48.c(131) : warning C4013: 'lrand48' undefined; assuming extern returning int
Rand48.c(154) : warning C4013: 'nrand48' undefined; assuming extern returning int
Rand48.c(176) : warning C4013: 'mrand48' undefined; assuming extern returning int
Rand48.c(199) : warning C4013: 'jrand48' undefined; assuming extern returning int
Rand48.xs(85) : warning C4013: 'seed48' undefined; assuming extern returning int
Rand48.xs(85) : warning C4047: '=' : 'unsigned short *' differs in levels of indirection from 'int '
Rand48.xs(88) : warning C4047: '=' : 'unsigned short *' differs in levels of indirection from 'int '
Running Mkbootstrap for Math::Rand48 ()
	C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e chmod 644 Rand48.bs
	C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Mksymlists  -e "Mksymlists('NAME'=>\"Math::Rand48\", 'DLBASE' => 'Rand48', 'DL_FUNCS' => {  }, 'FUNCLIST' => [], 'IMPORTS' => {  }, 'DL_VARS' => []);"
	link -out:blib\arch\auto\Math\Rand48\Rand48.dll -dll -nologo -nodefaultlib -debug -opt:ref,icf  -libpath:"C:\cpanrun\build\5-10-0\lib\CORE"  -machine:x86 Rand48.obj   C:\cpanrun\build\5-10-0\lib\CORE\perl510.lib oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib  comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib  netapi32.lib uuid.lib ws2_32.lib mpr.lib winmm.lib  version.lib odbc32.lib odbccp32.lib msvcrt.lib -def:Rand48.def
   Creating library blib\arch\auto\Math\Rand48\Rand48.lib and object blib\arch\auto\Math\Rand48\Rand48.exp
Rand48.obj : error LNK2001: unresolved external symbol _drand48
Rand48.obj : error LNK2001: unresolved external symbol _erand48
Rand48.obj : error LNK2001: unresolved external symbol _lrand48
Rand48.obj : error LNK2001: unresolved external symbol _nrand48
Rand48.obj : error LNK2001: unresolved external symbol _mrand48
Rand48.obj : error LNK2001: unresolved external symbol _jrand48
Rand48.obj : error LNK2001: unresolved external symbol _seed48
blib\arch\auto\Math\Rand48\Rand48.dll : fatal error LNK1120: 7 unresolved externals
NMAKE : fatal error U1077: 'link' : return code '0x460'
Stop.