Christian <christian(at)dnet(dot)net(dot)id> writes:
> i was trying to install postgres 7.1.3 on Redhat 9, using perl 5.8.0-88.3,
> ...
> somebody know how to fix this problem?
Use a later release.
Seriously, 7.1.* is not supported anymore. There are extremely serious
known bugs in it that will never be fixed. I can't imagine a reason for
you to be trying to build it rather than something more current.
regards, tom lane