alias <postgres(dot)rocks(at)gmail(dot)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