add 4 io

hc

2023-08-21 ef9e1ccebba20d2e3859126411166909a383f483

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ex-y += ex.o
ex-y += a.o
ex-y += b.o
ex-y += b.o
ex-y += empty/
ex-y += empty2/
ex-y += inc.o
 
libex-y += c.o
libex-y += d.o
libex-y += arch/