Checking if your kit is complete...
Looks good
Writing Makefile for PerlIO::subfile

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

cp subfile.pm blib\lib\PerlIO\subfile.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  subfile.xs > subfile.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv subfile.xsc subfile.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=\"0.08\"  -DXS_VERSION=\"0.08\"  "-IC:\cpanrun\build\5-10-0\lib\CORE"   subfile.c
subfile.c
subfile.xs(112) : warning C4244: '=' : conversion from '__int64 ' to 'int ', possible loss of data
Running Mkbootstrap for PerlIO::subfile ()
	C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e chmod 644 subfile.bs
	C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Mksymlists  -e "Mksymlists('NAME'=>\"PerlIO::subfile\", 'DLBASE' => 'subfile', 'DL_FUNCS' => {  }, 'FUNCLIST' => [], 'IMPORTS' => {  }, 'DL_VARS' => []);"
	link -out:blib\arch\auto\PerlIO\subfile\subfile.dll -dll -nologo -nodefaultlib -debug -opt:ref,icf  -libpath:"C:\cpanrun\build\5-10-0\lib\CORE"  -machine:x86 subfile.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:subfile.def
   Creating library blib\arch\auto\PerlIO\subfile\subfile.lib and object blib\arch\auto\PerlIO\subfile\subfile.exp
	C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e chmod 755 blib\arch\auto\PerlIO\subfile\subfile.dll
	C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e cp subfile.bs blib\arch\auto\PerlIO\subfile\subfile.bs
	C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e chmod 644 blib\arch\auto\PerlIO\subfile\subfile.bs

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

	C:\cpanrun\build\5-10-0\bin\perl.exe "-MExtUtils::Command::MM" "-e" "test_harness(1, 'blib\lib', 'blib\arch')" t/*.t
t/test....1..54
ok 1
ok 2 - seek to where subfile will start
ok 3
ok 4 - Apply subfile discipline with binmode
ok 5 - We should be at offset zero of the subfile
ok 6
ok 7 - seek to the start of the subfile
ok 8 - We should be at offset zero of the subfile again
ok 9
ok 10 - seek forwards
ok 11
ok 12 - seek backwards to the start
ok 13 - read first 3 lines
ok 14
ok 15 - Attempt to seek before the start of the subfile
ok 16
ok 17 - We should start at offset zero of the subfile
ok 18
ok 19 - We should start at offset zero of the subfile
ok 20
ok 21 - That should be the last line
ok 22 - Should be end of file
ok 23 - seek to the start of the subfile
ok 24
ok 25 - seek to the last line of subfile
ok 26
ok 27 - Should be end of file again
ok 28 - seek to last line of subfile
ok 29
ok 30 - Should be end of file again again
ok 31 - binmode ':subfile(start=-14)'
ok 32 - Binmode should take us to the start of the subfile
ok 33 - This should be the last line of numbers
ok 34 - nest disciplines with another binmode
ok 35 - slurp
ok 36 - seek to the second line of the subfile
ok 37
ok 38 - Attempt to seek before the start of the subfile
ok 39
ok 40 - Attempt to seek beyond the end of the inner subfile. Passes on unix
ok 41 - Beyond the end should indicate EOF
ok 42 - should read undef as we are at eof
ok 43 - read 11 to skip the capitals, layer perlio
ok 44 - binmode ':subfile(end=23)'
ok 45 - read first line
not ok 46 - slurp other lines # TODO Fix this for :perlio layer - however doesn't affect ex::lib::zip

#   Failed (TODO) test 'slurp other lines'
#   at t/test.t line 211.
#          got: 'two
# thre'
#     expected: 'two
# three
# four
# five'
ok 47 - read 11 to skip the capitals, layer stdio
ok 48 - binmode ':subfile(end=23)'
ok 49 - read first line

#   Failed test 'slurp other lines'
#   at t/test.t line 211.
not ok 50 - slurp other lines
#          got: 'two
# thre'
#     expected: 'two
# three
# four
# five'
ok 51 - read 11 to skip the capitals, layer unix
ok 52 - binmode ':subfile(end=23)'
ok 53 - read first line
ok 54 - slurp other lines
# Looks like you failed 1 test of 54.
dubious
	Test returned status 1 (wstat 256, 0x100)
DIED. FAILED test 50
	Failed 1/54 tests, 98.15% okay
Failed Test Stat Wstat Total Fail  List of Failed
-------------------------------------------------------------------------------
t/test.t       1   256    54    1  50
Failed 1/1 test scripts. 1/54 subtests failed.
Files=1, Tests=54,  0 wallclock secs ( 0.00 cusr +  0.00 csys =  0.00 CPU)
Failed 1/1 test programs. 1/54 subtests failed.
NMAKE : fatal error U1077: 'C:\cpanrun\build\5-10-0\bin\perl.exe' : return code '0x1'
Stop.