al hacer make aparece este nuevo y parece que es necesario instalar bison?:
ERROR: `bison' is missing on your system. It is needed to create the
file `parse.h'. You can either get bison from a GNU mirror site
or download an official distribution of PostgreSQL, which contains
pre-packaged bison output.
***
make[3]: *** [parse.h] Error 1
make[3]: se sale del directorio `/usr/local/postgresql-8.3.5/src/backend/parser'
make[2]: *** [parser/parse.h] Error 2
make[2]: se sale del directorio `/usr/local/postgresql-8.3.5/src/backend'
make[1]: *** [all] Error 2
make[1]: se sale del directorio `/usr/local/postgresql-8.3.5/src'
make: *** [all] Error 2