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c03a233faa
I think that the trailing __ got added in false analogy to HAVE_MACRO__func__, HAVE_MACRO__FUNC__, and HAVE_MACRO__FUNCTION__. But those macros actually indicate the presence of __func__, __FUNC__, and __FUNCTION__ respectively. The __ at the end of HAVE_EXTERN_ENVIRON_DECLARED would only be appropriate if the environ were declared__, whatever that means. (As a side-note, HAVE_MACRO__func__ and so on should probably be renamed HAVE_MACRO___func__ and so on. But that can wait.) This is an identifier renaming only.