If perl is installed in a directory like "C:\Program Files (x86)\ActiveState\5.12\bin" Then the ms/do_win64a.bat script fails with the error:
C:\build.ntx64>perl ms\uplink-x86_64.pl masm 1>ms\uptable.asm 'C:\Program' is not recognized as an internal or external command, operable program or batch file. The fix is to put quotes around the $^X in the command pipe.
--- ms/uplink-x86_64.pl.~1~ 2008-12-19 02:17:29.000000000 -0800 +++ ms/uplink-x86_64.pl 2012-05-21 15:41:01.287514200 -0700 @@ -2,7 +2,7 @@ $output=shift; $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; -open STDOUT,"| $^X ${dir}../crypto/perlasm/x86_64-xlate.pl $output"; +open STDOUT,"| \"$^X\" ${dir}../crypto/perlasm/x86_64-xlate.pl $output"; push(@INC,"${dir}."); require "uplink-common.pl";