Manuel Trujillo <manueltrujillo@dorna.es> writes:
> The program tell me a "warning" like this:
> Archiver: WARNING - requested compression not available in this
> installation - archive will be uncompressed
> What I make to do for obtain the necessary compression for the "-Fc"
> flag and work after with pg_restore?
You need to install zlib, then reconfigure and rebuild Postgres.
Pay attention to whether the configure run finds zlib...
regards, tom lane