Solaris

Hi All,
I am having a code written in C++.First I build this code on SUN 5.10.It was built successfully.Following is the log when build was successful.

-L/apps/compilers/SUNWspro/lib -lm -lsunmath \
-o App
ld: warning: symbol `clog' has differing types:
(file /apps/SUNWspro_studio10/lib/libiostream.so type=OBJT; file /lib/libm.so type=FUNC);
/apps/SUNWspro_studio10/lib/libiostream.so definition taken

After this warning also I got the executable as App.

but when I build same code in another environment(on SUN 5.10 only)having same configuration as earlier.It has thrown "symbol reference error".Build log is as follows.

-L/appl/util/Sun/SUNWspro/prod/lib -lm -lsunmath \
-o App
CC: Warning: -xarch=v8plusa is deprecated, use -m32 -xarch=sparcvis instead
ld: warning: symbol `clog' has differing types:
(file /appl/util/Sun/SUNWspro/lib/libiostream.so type=OBJT; file /lib/libm.so type=FUNC);
/appl/util/Sun/SUNWspro/lib/libiostream.so definition taken
Undefined first referenced
symbol in file
main /appl/util/Sun/SUNWspro/prod/lib/crt1.o
ld: fatal: Symbol referencing errors. No output written to App
*** Error code 1
make: Fatal error: Command failed for target `App'


Only difference I see is the -xarch warning.
Is the warning causig error?
If yes how could I resolve this?

If not the warning then what could be the cause of error.

Thanks in advance.