Re: [Gems-users] opal.so problem

[Dave <zhu_dave@xxxxxxxxx>]

I've upgraded to gcc version 4.0.2 20051125 (Red Hat 4.0.2-8) to resolve the undefined symbol problem mentioned below. But now, I get the following error:

Compiling module_id.c 
`-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead.
Linking opal.so
/home/GEMS/simics-2.2.19/x86-linux/lib/opal.so: /home/GEMS/simics-2.2.19/x86-linux/lib/opal.so: undefined symbol: _ZN22generic_cache_templateI21generic_cache_block_tE6AccessEP6miss_t
gmake[2]: *** [/home/GEMS/simics-2.2.19/x86-linux/lib/opal.so] Error 1
gmake[2]: *** Deleting file `/home/GEMS/simics-2.2.19/x86-linux/lib/opal.so'
make[1]: *** [opal] Error 2
make[1]: Leaving directory `/home/GEMS/simics-2.2.19/x86-linux/lib'
make: *** [module] Error 2

I thought the undefined symbol should be in opal/x86-linux/obj/cache.o, but it's not. What could be the problem?

Thank you.

Dave

"Min Xu (Hsu)" <xu@xxxxxxxxxxx> wrote:

Dave,

Now, I see. It is likely your error was caused by the compiler.
The function in question was not defined in your cache.o, but
in my cache.o it was defined.

A little google search revealed that gcc 4.0.0 has a bug that
ignores template instantiation. Please try upgrade your compiler
to a newer version.

Or, you perhaps can work around this problem by changing this line

template class generic_cache_template;

to this line

class generic_cache_template foo;

Hope this helps,
-Min

On Wed, 15 Mar 2006 Dave wrote :
> Yes I do. Attached you will find the nm output from cache.o. I'm using gcc version 4.0.0 20050519 (Red Hat 4.0.0-8).
>
> Thanks,
>
> Dave
>
> "Min Xu (Hsu)" wrote: Do you have these two lines in Cache.C! ?
>
> // C++ template: explicit instantiation
> template class generic_cache_template;
>
> If yes, can you dump the nm output from Cache.o to me?
>
> On Mon, 13 Mar 2006 Dave wrote :
> > OK.
> >
> > The undefined symbol _ZN22generic_cache_templateI21generic_cache_block_tE9TagSearchEybbPPS0_Pj is in opal/x86-linux/obj/cache.o.
> >
> > Dave
> >
> > "Min Xu (Hsu)" wrote: The .o files are in opal/x86_linux/obj, or a similar directory under
> > opal/x86-linux.
> >
> > On Mon, 13 Mar 2006 Dave wrote :
> > > Min,
> > >
> > > "nm" returns an error because it cannot find "a.out". There is no ".o" files in that directory (/home/GEMS/simics-2.2.19/x86-linux/lib/). I'm copying the output from opal compilation, maybe it helps to see at what step it fails.
> > >
> > > > make module DESTINATION=MOSI_SMP_bcast
> > > Opal: building module
> > > make generated/generated
> > > make[1]: Entering directory `/home/GEMS/opal'
> > > make[1]: `generated/generated' is up to date.
> > > make[1]: Leaving directory `/home/GEMS/opal'
> > > make BUILD_FLAGS=-DSIMICS module_go
> > > make[1]: Entering directory `/home/GEMS/opal'
> > > Made module
> > > make[1]: Leaving directory `/home/GEMS/opal'
> > > Opal: Linking simics module
> > > cd ../simics/x86-linux/lib; make opal
> > > make[1]: Entering directory `/home/GEMS/simics-2.2.19/x86-linux/lib'
> > > === Building module "opal" using the 2.0 API ===
> > > gmake[2]: Circular /home/GEMS/simics/x86-linux/obj/include/simics/module_id.c <- /home/GEMS/simics/x86-linux/obj/include/simics/module_id.c dependency dropped.
> > > Creating dependencies: module_id.c
> > > Creating dependencies: opal.c
> > > gmake[2]: Circular /home/GEMS/simics/x86-linux/obj/include/simics/module_id.c <- /home/GEMS/simics/x86-linux/obj/include/simics/module_id.c dependency dropped.
> > > Creating exportmap.elf
> > > Compiling opal.c
> > > `-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead.
> > > /home/GEMS/simics/src/extensions/opal/opal.c:110: warning: ? defined but not used
> > > Compiling module_id.c
> > > `-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead.
> > > Linking opal.so
> > > /home/GEMS/simics-2.2.19/x86-linux/lib/opal.so: /home/GEMS/simics-2.2.19/x86-linux/
> > > lib/opal.so: undefined symbol: _ZN22generic_cache_templateI21generic_cache_block_tE9TagSearchEy
> > > bbPPS0_Pj
> > > gmake[2]: *** [/home/GEMS/simics-2.2.19/x86-linux/lib/opal.so] Error 1
>! > > gmake[2]: *** Deleting file `/home/GEMS/simics-2.2.19/x86-linux/lib/opal.so'
> > > make[1]: *** [opal] Error 2
> > > make[1]: Leaving directory `/home/GEMS/simics-2.2.19/x86-linux/lib'
> > > make: *** [module] Error 2
> > >
> > > Thanks,
> > >
> > > Dave
> > >
> > > "Min Xu (Hsu)" wrote: Dave,
> > >
> > > The error seems to be related to generic_cache_template not being
> > > instantiated in none of the .C file, but still being called.
> > > Perhaps we have a bug that we may missed an instantiation statement
> > > (this is unlikely because the same code works here), or (more likely)
> > > we have a compiler incompatibility problem.
> > >
> > > To further determine the cause of the problem, can you use "nm"
> > > to find our which .o file calls the un! defined the symbol?
> > >
> > > -Min
> > >
> > > On Sun, 12 Mar 2006 Dave wrote :
> > > > Hello All,
> > > >
> > > > I'm trying to compile opal on a x86 Linux machine (make module DESTINATION=MOSI_SMP_bcast). (gems 1.2, simics 2.2.19, gcc 4.0.0). I'm getting some errors with the opal compilation as follows:
> > > >
> > > > === Building module "opal" using the 2.0 API ===
> > > > gmake[2]: Circular /home/GEMS/simics/x86-linux/obj/include/simics/module_id.c <- /home/GEMS/simics/x86-linux/obj/include/simics/module_id.c dependency dropped.
> > > > Linking opal.so
> > > > /home/GEMS/simics-2.2.19/x86-linux/lib/opal.so: /home/GEMS/simics-2.2.19/x86-linux/lib/opal.so: undefined symbol: _ZN22generic_cache_templateI21generic_cache_block_tE9TagSearchEybbPPS0_Pj
> > > > gmake[2]: *** [/home/GEMS/simics-2.2.19/x86-linux/lib/opal.so] Error 1
> > > > gmake[2]: *** Deleting file `/home/GEMS/simics-2.2.19/x86-linux/lib/opal.so'
> > > > make[1]: *** [opal] Error 2
> > > > make[1]: Leaving directory `/home/GEMS/simics-2.2.19/x86-linux/lib'
> > > > make: *** [module] Error 2
> > > >
> > > >
> > > > Thank you for your help!
> > > >
> > > > Dave
> > > >
> > > >
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