I usually cheat and install a prebuilt binary when the make doesn't work: (AIX PDSLIB at UCLA)
I know it's not the best solution but I have found that resolving compiler flag and library mismatches can consume lots of time.

In reply to Re: install 5.8.0 on AIX 5.1 by fstat(pipe)
in thread install 5.8.0 on AIX 5.1 by OneMeanSloth

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