This doesn't seem to work with the latest ActivePerl (5.10.1.1007)

Executing perl Makefile.PL CC=g++ reports

C:\Packages\Encode-Detect-1.01>perl Makefile.PL CC="cl -TP"
# running Build.PL --config cc=cl -TP
cl : Command line warning D9035 : option 'o' has been deprecated and w
+ill be rem
oved in a future release
compilet-1026621440.c
'dlltool' is not recognized as an internal or external command,
operable program or batch file.
LINK : warning LNK4044: unrecognized option '/o'; ignored
LINK : warning LNK4044: unrecognized option '/Wl,--base-file,C:\DOCUME
+~1\VMUser\
LOCALS~1\Temp\compilet.base'; ignored
LINK : warning LNK4044: unrecognized option '/Wl,--image-base,0xa03000
+0'; ignore
d
LINK : fatal error LNK1181: cannot open input file 'C:\DOCUME~1\VMUser
+\LOCALS~1\
Temp\compilet.dll'
'dlltool' is not recognized as an internal or external command,
operable program or batch file.
LINK : warning LNK4044: unrecognized option '/o'; ignored
LINK : warning LNK4044: unrecognized option '/Wl,--image-base,0xa03000
+0'; ignore
d
LINK : fatal error LNK1181: cannot open input file 'C:\DOCUME~1\VMUser
+\LOCALS~1\
Temp\compilet.dll'
Creating new 'MYMETA.yml' with configuration results
Creating new 'Build' script for 'Encode-Detect' version '1.01'
[download]

Not sure if this is already an issue but following the guidelines above the nmake test fails and finally trying to make install reports this:

blib\arch\auto\Encode\Detect\Detector\Detector.dll : fatal error LNK11
+20: 5 unre
solved externals
NMAKE : fatal error U1077: '"c:\Program Files\Microsoft Visual Studio 
+9.0\VC\BIN
\link.EXE"' : return code '0x460'
Stop.
[download]

It's a pity since it was working fine under perl 5.8.8