RDiscount 2.0.7.1 - Windows 7 - make in ext/

gistfile1.txt

compiling rdiscount.c
In file included from c:\ruby193\devkit\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/windows.h:48:0,
                 from c:\ruby193\devkit\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/winsock2.h:22,
                 from c:/Ruby193/include/ruby-1.9.1/ruby/win32.h:40,
                 from c:/Ruby193/include/ruby-1.9.1/ruby/defines.h:223,
                 from c:/Ruby193/include/ruby-1.9.1/ruby/ruby.h:67,
                 from c:/Ruby193/include/ruby-1.9.1/ruby.h:32,
                 from rdiscount.c:3:
c:\ruby193\devkit\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/windef.h:229:23: error: duplicate 'unsigned'
c:\ruby193\devkit\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/windef.h:238:23: error: duplicate 'unsigned'
c:\ruby193\devkit\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/windef.h:238:23: error: two or more data types in declaration specifiers
c:\ruby193\devkit\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/windef.h:241:24: error: duplicate 'unsigned'
rdiscount.c: In function 'rb_rdiscount_to_html':
rdiscount.c:19:5: warning: implicit declaration of function 'rb_rdiscount__get_flags'
rdiscount.c:19:5: warning: ISO C90 forbids mixed declarations and code
rdiscount.c:32:5: warning: ISO C90 forbids mixed declarations and code
rdiscount.c: In function 'rb_rdiscount_toc_content':
rdiscount.c:68:5: warning: ISO C90 forbids mixed declarations and code
make: *** [rdiscount.o] Error 1