[ferret_users] external functions with suse linux 9.3

[Martin Schmidt <mschmidt@xxxxxxxxxxxxxxxxx>]

Hi,

I am trying to build external functions for ferret  v5.81
Linux(g77) 2.4.21-32 - 07/14/05. I am using Suse Linux 9.3,
which has a 2.6 kernel.

I followed the instruction to build external functions 
and started with the examples.  I use
 platform_specific_flags.mk.i386-linux
 
Make runs through and I can install in my path for external
functions. Starting now ferret, and listing the
external funtions, all show an error like the following:
  
    ERROR in External Function fill_xy:
   Dynamic linking call dlopen() returns --
   "./fill_xy.so: undefined symbol: ef_version_test_".
   
Other functions are missing other symbols, in dependence on what is
called first there. I have checked the mail archive, but could not find
an example, where the included library is found but the exports
of ferret are missing. I was also playing around with -fno_underscoring 
but this does not help. The missing symbol
does not have an underscore with this option.

I am using gcc (g77) as it comes with the linux distribution.

gcc-Version 3.3.5 20050117 (prerelease) (SUSE Linux)
Thread-Modell: posix

Does anyone have an idea how to tell the linker or loader, where
the missing symbols are? 
Do they have an underscore?

Many thanks and regards,
Martin Schmidt