Re: 64 Bit code generation using gcc

[Eljay Love-Jensen <eljay at adobe dot com>]

Hi Ashish,

>How can I resolve my problem.

You have a GCC 2.95.3 built for 32-bit SPARC targets.

You need to get a GCC build for 64-bit SPARC targets.

The Sun Ultra 5 and Ultra 10 use a SPARC II CPU, which I think is capable 
of 32-bit and 64-bit modes.

If I recall correctly (and I may be complete wonky here; I haven't done any 
assembly work on SPARC), the SPARC II supports a SPARCv9 (64-bit) and 
SPARCv8+ (32-bit) instruction sets.  SPARCv8+ being SPARCv8 32-bit plus 
some additional cool (nice performance) instructions not normally available 
to the SPARCv8 instruction set.  (I''m sure the details of which are out on 
the internet somewhere.)

>If not, which gcc version I should use.

I do not know if GCC 2.95.x supports 64-bit SPARC targets.  I suspect it 
does -- but it has to be built specifically for 64-bit.

I vaguely recall that there was some issue having a single GCC build that 
supports both 32-bit and 64-bit code generation.  Either you need two 
separate GCC builds, or it takes some TLC (tender loving care) to get the 
configuration just right for everything to work.

This forum does not provide binaries -- we're mostly GCC users who are 
helping other users.  GNU does not provide binaries either.

But this site...
http://sunfreeware.com/
...does provide prebuilt binaries for SunOS.  Look for GCC there.  And I 
recommend the latest GCC available there:  GCC 3.4.2 when I just 
looked.  That one has both 32-bit support (default) and 64-bit support (-m64).

Please read this...
http://docs.sun.com/db/doc/806-0477
...to determine if you really need 64-bit.

CAUTION:  GCC (any version) prebuilts are tightly coupled to the SunOS 
version AND patch level of the system upon which they were 
BUILT.  Why?  Because patch levels often rev the system header files; and 
when GCC is built, it "fixes" the system header files and caches the 
GCC-ized ones.  If your system has a different patch level (which is 
probably will), you MAY want to consider building your own GCC.  But you 
still need a compiler (such as one from Sunfreeware.com) to bootstrap the 
whole process.  If your not running into issues, or you don't use some of 
the dusty corner low level system API (e.g., the SPARC high-resolution 
hardware timers in libdt.so), you probably won't run into any issues.

HTH,
--Eljay