Curious to sort out the differences between the two.

Not much... 

#define newRV_inc(sv)   newRV(sv)

[download]

"newRV_inc is the official function name to use now." according to a comment.

In reply to Re^3: Inline C : dereferencing array of hash references returned from function by ikegami
in thread Inline C : dereferencing array of hash references returned from function by String62

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