Libtool does not generate shared libraries when cross compiling x86/64 -> sparc64 using fujitsu compiler

Hello list,

   we want to use libtool on a system on which we have to cross-compile 
from intel x86/64 to sparc/64 using the Fujitsu compiler (fccpx). 
Unfortunately, I'm unable to get libtool (version 2.4.2) to generate 
shared libraries.

   I have written a very small libtool + autotools example and run the 
following but I'm always getting the output shown below the commands. 
Note, that the same works fine in a linux/x86-64 and I don't have to add 
--enable-shared in that case, so I guess I don't need --enable-shared 
either in these tests.

COMMANDS:

   ./configure --prefix=/tmp/test CC=fccpx --host=x86_64
   ./configure --prefix=/tmp/test CC=fccpx --host=x86-64 --target=sparc64
   ./configure --prefix=/tmp/test CC=fccpx --host=x86_64 
--target=sparc64-linux

OUTPUT:

checking for fccpx option to produce PIC...  -DPIC
checking if fccpx PIC flag  -DPIC works... yes
checking if fccpx static flag  works... yes
checking if fccpx supports -c -o file.o... yes
checking if fccpx supports -c -o file.o... (cached) yes
checking whether the fccpx linker (/usr/bin/ld) supports shared 
libraries... yes
checking dynamic linker characteristics... no
checking how to hardcode library paths into programs... immediate
checking for shl_load... no
checking for shl_load in -ldld... no
checking for dlopen... yes
checking whether a program can dlopen itself... cross
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... no
checking whether to build shared libraries... no
checking whether to build static libraries... yes

   So, am I doing something wrong when cross-compiling? Or maybe libtool 
does not understand fccpx?

Thank you very much in advance.

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