David, I will take the "thank you for restoring bootstrap for AIX" as implied in your e-mail.
Second, the patch that you applied is unacceptable. ASYNC_IO already is set to zero for AIX.
There is a clear procedure for this something that you deem
"unacceptable": Submit a patch (for which I promise a fast
review) or, if you feel that the patch is simple and obvious,
commit it yourself and announce it to the fortran and gcc-patches
mailing list.
Thomas
