build of 9.0 did not make an "etc" directory

The log from make shows

echo "#define PGBINDIR \"/opt/PostgreSQL/9.0/bin\"" >pg_config_paths.h
echo "#define PGSHAREDIR \"/opt/PostgreSQL/9.0/share/postgresql\""
>>pg_config_paths.h
echo "#define SYSCONFDIR \"/opt/PostgreSQL/9.0/etc/postgresql\""
>>pg_config_paths.h
echo "#define INCLUDEDIR \"/opt/PostgreSQL/9.0/include\""
>>pg_config_paths.h
echo "#define PKGINCLUDEDIR
\"/opt/PostgreSQL/9.0/include/postgresql\"" >>pg_config_paths.h
echo "#define INCLUDEDIRSERVER
\"/opt/PostgreSQL/9.0/include/postgresql/server\"" >>pg_config_paths.h
echo "#define LIBDIR \"/opt/PostgreSQL/9.0/lib\"" >>pg_config_paths.h
echo "#define PKGLIBDIR \"/opt/PostgreSQL/9.0/lib/postgresql\""
>>pg_config_paths.h
echo "#define LOCALEDIR \"/opt/PostgreSQL/9.0/share/locale\""
>>pg_config_paths.h
echo "#define DOCDIR \"/opt/PostgreSQL/9.0/share/doc//postgresql\""
>>pg_config_paths.h
echo "#define HTMLDIR \"/opt/PostgreSQL/9.0/share/doc//postgresql\""
>>pg_config_paths.h
echo "#define MANDIR \"/opt/PostgreSQL/9.0/share/man\""
>>pg_config_paths.h

but I do not see it in /opt/PostgreSQL/9.0.

Further, pc_config also believes it exists (or should):

am-rjs:bin$ pwd
/opt/PostgreSQL/9.0/bin
am-rjs:bin$ ./pg_config --sysconfdir
/opt/PostgreSQL/9.0/etc/postgresql

I do have the bin, include, lib and share directories.

I built with the following:

am-rjs:bin$ ./pg_config --configure
'--prefix=/opt/PostgreSQL/9.0' '--with-ossp-uuid' '--with-libxml'
'--with-libxslt' '--with-openssl' '--with-perl' '--with-python'

Best to just restart?