GCC3.1 Solaris 64bit shared libraries - bad ELF flag 2

[John Surveyor <jsurveyor at macquarie dot net dot au>]

Hi all,
I am having difficulty building a working shared 64 bit object. I am using
GNU as (from binutils 2.11.2) and the Solaris8 ld.
GCC 3.1 was built with ../configure --with-as=/usr/local/bin/as
--with-ld=/usr/ccs/bin/ld

In the example below I have compiled a really short test program in 32bits
with a shared object, 64bits with a shared object and 64 bits without a
shared object. The 64 bit shared binary fails to run with a message about
the ELF flags.

Sample program:
f.c:
	#include <stdio.h>
	#include <math.h>
	int f() {printf("Test %g\n", sin((double)0.5) );return 0;}
main.c:
	main() { f(); }
compilation (64bit)
	gcc -m64 -c -o f64.o f.c 
	ld -Bdynamic -G -o f64.so f64.o -lm
	gcc -m64 -o main64 main.c ./f64.so -lm

	gcc -m64 -o main64static main.c f64.o -lm
compilation(32bit)
	gcc -c -o f32.o f.c 
	ld -Bdynamic -G -o f32.so f32.o -lm 
	gcc -o main32 main.c ./f32.so -lm 

output
	$ ./main32
	Test 0.479426
	$ ./main64
	ld.so.1: ./main64: fatal: ./f64.so: bad ELF flags value: 2
<--------------
	Killed
	$ ./main64static
	Test 0.479426
file main32 main64* *.so
	main32:         ELF 32-bit MSB executable SPARC Version 1,
dynamically linked, not stripped
	main64:         ELF 64-bit MSB executable SPARCV9 Version 1,
dynamically linked, not stripped
	main64static:   ELF 64-bit MSB executable SPARCV9 Version 1,
dynamically linked, not stripped
	f32.so:         ELF 32-bit MSB dynamic lib SPARC Version 1,
dynamically linked, not stripped
	f64.so:         ELF 64-bit MSB dynamic lib SPARCV9 Version 1,
dynamically linked, not stripped
ldd output
	$ ldd ./f32.so
	        libm.so.1 =>     /usr/lib/libm.so.1
	        libc.so.1 =>     /usr/lib/libc.so.1
	        libdl.so.1 =>    /usr/lib/libdl.so.1
	        /usr/platform/SUNW,UltraSPARC-IIi-cEngine/lib/libc_psr.so.1
	$ ldd ./f64.so
	$ 

I am also curious about the ldd result - the reason for calling sin() was to
require libm so that ldd on f32.so would produce interesting output. ldd on
f64.so doesnt produce any output.

I am stuck on this. I really need a shared 64 bit library so I hope somebody
can tell me what to do next.

Regards
John