Doesn't compile on Windows

[jmthomas]

I would love to use this on Windows if possible.

    C:/Ruby215p273/bin/ruby.exe extconf.rb
checking for rb_obj_gc_flags() in ruby/ruby.h... yes
checking for sys/time.h... yes
checking for sys/resource.h... no
checking for time.h... yes
checking for clock_gettime()... yes
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
generating gc_tracer-i386-mingw32.def
compiling gc_logging.c
In file included from gc_logging.c:15:0:
gc_tracer.h: In function 'setup_gc_trace_symbols':
gc_tracer.h:33:5: error: 'sym_rusage_timeval' undeclared (first use in this function)
gc_tracer.h:33:5: note: each undeclared identifier is reported only once for each function it appears in
gc_logging.c: In function 'fill_rusage':
gc_logging.c:150:16: error: 'struct gc_logging' has no member named 'filled_rusage'
gc_logging.c:151:9: error: 'struct gc_logging' has no member named 'filled_rusage'
gc_logging.c:152:2: warning: implicit declaration of function 'getrusage' [-Wimplicit-function-declaration
gc_logging.c:152:12: error: 'RUSAGE_SELF' undeclared (first use in this function)
gc_logging.c:152:33: error: 'struct gc_logging' has no member named 'rusage'
gc_logging.c: In function 'out_rusage':
gc_logging.c:243:60: error: 'struct gc_logging' has no member named 'rusage'
gc_logging.c:244:60: error: 'struct gc_logging' has no member named 'rusage'
gc_logging.c: At top level:
gc_logging.c:239:1: warning: 'out_rusage' defined but not used [-Wunused-function]
make: *** [gc_logging.o] Error 1

make failed, exit code 2