C:\Ruby-0.07>perl makefile.pl
Set up gcc environment - 3.4.5 (mingw-vista special r3)
Using C:\Ruby192\bin\ruby.exe
ruby 1.9.2p290 (2011-07-09) [i386-mingw32]

ruby-inc: C:/Ruby192/lib/ruby/1.9.1/i386-mingw32
libdir  : C:/Ruby192/lib
ruby-lib: -lmsvcrt-ruby191
ruby-hdr: C:/Ruby192/include/ruby-1.9.1
Note (probably harmless): No library found for -lmsvcrt-ruby191
Writing Makefile for Ruby
Writing MYMETA.yml