Missing configure file
 

I downloaded the postgresql-base-7.2.1 and postgresql-opt-7.2.1 tarballs from a trusted source.
Its installation instructions say:
./configure
gmake
...
I tried to follow them, but there is no configure file anywhere.
When I run gmake, it said:
'You need to run the configure program first.'
What to do then?

Did you first untar the tarballs and look in their direcotries for a configure file?

tar -zxvf postgresql-base-7.2.1.tar.gz
tar -zxvf postgresql-opt-7.2.1.tar.gz

I know the reason now; MD5 checksum does not match: this fucked intranet made a mistake again!
Incredible: one just cannot copy an archive file (arj, rar, tar, cab, etc.) between computers on the intranet as the copy will not be the same as the original.
I should have known from the beginning.

Now I could manage somehow to copy the file to the server without errors.
All MD5 checksums are correct. Gcc version is OK.
Still I get several error messages like this when running gmake:
gmake[2]: [access-recursive] Error 2
gmake[2]: Leaving directory '/usr/local/postgresql-7.2.1/src/backend/access