64 Bit code generation using gcc

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Dear Sir/ Madam,
   I am trying to compile my source codes on Sun Solaris 9 Operating
system running on sun4u sparc SUNW,Ultra-5_10 using gcc-2.95.3. The
kernel is running on 64 bit. I m giving the command
      gcc program.c

it is creating progrom.o with ELFCLASS32. To generate 64 bit target, if I
provide gcc -mcpu=v9 -m64 program.c
   it is saying that "cannot use v8plus instructions in a non-v8plus
target binary" and "-m64 is not supported by this configuration.
-mptr32 not allowed on -m64".
    How can I resolve my problem. Does gcc-2.95.3 supports generation of
64 bit ELFCLASS/ target. If not, which gcc version I should use.
  Looking for your positive response.

Thanks and Regards,
Ashish Mangla
ASDC - SCADA
CMC Limited, Hyderabad
Contact 23000501, 401 Ext: 2302, M: 9866223028
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