Problem compiling PostGIS 1.1.4

PostgreSQL 8.1 on ubuntu-linux 6.06  (kernel 2.6.15-27-686):

Compiled proj-4.4.9 and geos-2.2.3 without problems.

Output from postgis-./configure-Command:

  SUMMARY
 -------------------------------------------------------

 HOST_OS: linux-gnu

   PGSQL: /usr/bin/pg_config
    GEOS: /usr/local/bin/geos-config (with C-API)
          (ldflags: -L/usr/local/lib)
    PROJ: prefix=/usr/local libdir=/usr/local/lib
   ICONV: 1

 PORTNAME: linux
   PREFIX: /usr
  EPREFIX: ${prefix}
      DOC: /usr/share/doc/postgresql-doc-8.1/contrib
     DATA: /usr/share/postgresql/8.1/contrib
      MAN: /usr/share/postgresql/8.1/man
      BIN: /usr/lib/postgresql/8.1/bin
      EXT: /usr/lib/postgresql/8.1/lib (\$$libdir)
 -------------------------------------------------------


make check with problems:
"...ERROR:  function postgis_lib_version() does not exist
HINT:  No function matches the given name and argument types. You may
need to add explicit type casts...."


Running lwpostgis.sql on my database results in multiple errors:
"BEGIN
psql:lwpostgis.sql:39: NOTICE:  type "histogram2d" is not yet defined
DETAIL:  Creating a shell type definition.
psql:lwpostgis.sql:39: ERROR:  could not load library
"/usr/lib/postgresql/8.1/lib/liblwgeom.so.1.1": libgeos_c.so.1: cannot
open  shared object file: No such file or directory
..."


What went wrong?