[openvrml-develop] src/openvrml - install - ./configure not found - OPENsuse 11.2

[<Hug...@we...>]

Hello all,
I want to try your openvrml. But already at the first step I have a problem.
The file INSTALL file tells me I should run ./configure.
but there are two files with suffix opt or dbg - no configure:

openvrml> ls -l con*
-rw-r--r-- 1 fgfs users 16792  2. Sep 19:12 configure.ac
-rwxr-xr-x 1 fgfs users   436  2. Sep 19:12 configure-gcc-dbg
-rwxr-xr-x 1 fgfs users   404  2. Sep 19:12 configure-gcc-opt

What is the difference?

If I run the dbg version I get:

openvrml> ./configure-gcc-dbg
./configure-gcc-dbg: Zeile 3: ./configure: Datei oder Verzeichnis nicht gefunden

Obviously it wants to run ./configure.  But that is not existing.
What should I do?

Thanks in advance
    Hugo