[Q] GNUstep Solaris 64 bit compilation

Hello everybody,

I'm trying to compile GNUstep under Solaris 2.8, 64 bit processor
and I want to make 64-bit system.

I have compiled gcc (4.0.0) myself - it seemed fine, but now
it does not want to link with the libraries for proper architecture.

The configuration command (I removed -I and -L stuff)

  CFLAGS="-m64 -mcpu=v9" LDFLAGS="-m64 -mcpu=v9" ./InstallGNUstep

reports

  checking whether objc really works... no

because the resulting executable does not specify that
it requires the 64-bit versions of the libraries.

More details look like this.
The following compilation succeeds:

gcc -o conftest -m64 -mcpu=v9 -I<my_prefix> \
  -x objective-c -fgnu-runtime -m64 -mcpu=v9 \
  -L<my_prefix> config/config.objc.m \
  -lffi -lssl -lsocket -lcrypto -liconv -lobjc

but the resulting executable does not know
where to find the libraries:

> ldd conftest

  libffi.so.4 =>   <...>/gcc4gnu/lib/libffi.so.4  - wrong ELF class:
ELFCLASS32
  libobjc.so.1 =>  <...>/gcc4gnu/lib/libobjc.so.1  - wrong ELF class:
ELFCLASS32
  libgcc_s.so.1 => <...>/gcc4gnu/lib/libgcc_s.so.1  - wrong ELF class:
ELFCLASS32
  [...]

However, I have them all perfectly 64 bits one level down,
in <...>/gcc4gnu/lib/sparcv9 directory.

I can force runtime linker to look there first by unsing LD_LIBRARY_PATH
or with LDFLAGS="-R<path>", but I expected the gcc/gnu ld combination to
select the proper
libraries based on architecture, the same way native Solaris tools do.

What am I missing? What is the right way to configure?

Thank you,
Tima