> Thank you! I commit this patch to my repository of github.
> https://gist.github.com/1569277#file_mingw_aligned_malloc.patch
> https://github.com/authorNari/ruby/commit/5b0b56c7e60b532ed732fa39ae682a8ed0396dfa

Thanks for your work :)
I saw commit r34225. This has __mingw_aligned_malloc but doesn't have
__mingw_aligned_free.
This causes a build error with mingw32 gcc.

compiling ../../../ruby/gc.c
../../../ruby/gc.c: In function 'aligned_free':
../../../ruby/gc.c:1085:5: error: implicit declaration of function
'_aligned_free'
make: *** [gc.o] Error 1
rake aborted!
Command failed with status (2): [make...]

-- 
Hiroshi Shirosaki