alias <postgres.ro...@gmail.com> writes:
> Now I  am not sure what the first 10 lines mean.

Those are computing the file pathnames of regress.so and a couple of
other .so files that contain the C functions referred to in the
CREATE commands just below here.  We can't just hard-wire those file
names into the script; they have to be computed at run-time because
everybody's paths will be different.

                        regards, tom lane


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