undefined reference to `__sync_val_compare_and_swap_4' error at compilation, using gcc 4.1.1 and 4.2

[goliath (Gast)]

Using crosstool (http://kegel.com/crosstool/) scripts i've built under 
Cygwin(http://www.cygwin.com/) the following compilers gcc-4.1.1 and 
4.2.0 20061024 (prerelease) for Sparc V8 architecture:

$ ./sparc-unknown-linux-gnu-gcc -v
Using built-in specs.
Target: sparc-unknown-linux-gnu
Configured with: /crosstool-0.43/build/sparc-unknown-linux-gnu/gcc-4.1.1-glibc-2.3.6/gcc-4.1.1/configure --target=sparc-unknown-linux-gnu --host=i686-host_pc-cygwin --prefix=/opt/crosstool/gcc-4.1.1-glibc-2.3.6/sparc-unknown-linux-gnu --with-headers=/opt/crosstool/gcc-4.1.1-glibc-2.3.6/sparc-unknown-linux-gnu/sparc-unknown-linux-gnu/include --with-local-prefix=/opt/crosstool/gcc-4.1.1-glibc-2.3.6/sparc-unknown-linux-gnu/sparc-unknown-linux-gnu --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atexit --enable-languages=c,c++ --enable-shared --enable-c99 --enable-long-long
Thread model: posix
gcc version 4.1.1

and

$ ./sparc-unknown-linux-gnu-gcc -v
Using built-in specs.
Target: sparc-unknown-linux-gnu
Configured with: /crosstool-0.43/build/sparc-unknown-linux-gnu/gcc-4.2-20061024-                           glibc-2.3.6/gcc-4.2-20061024/configure --target=sparc-unknown-linux-gnu --host=i                           686-host_pc-cygwin --prefix=/opt/crosstool/gcc-4.2-20061024-glibc-2.3.6/sparc-un                           known-linux-gnu --with-headers=/opt/crosstool/gcc-4.2-20061024-glibc-2.3.6/sparc                           -unknown-linux-gnu/sparc-unknown-linux-gnu/include --with-local-prefix=/opt/cros                           stool/gcc-4.2-20061024-glibc-2.3.6/sparc-unknown-linux-gnu/sparc-unknown-linux-g                           nu --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atex                           it --enable-languages=c,c++ --enable-shared --enable-c99 --enable-long-long
Thread model: posix
gcc version 4.2.0 20061024 (prerelease)
It is necessary for me that i can use in my programs __sync_val_compare_and_swap function related to the Atomic-Builtins, which supports whith 4.1.* version of gcc.

I try to compile simple C code:

long cmpxchg( long* value, long comp_val, long new_val )
{
    return __sync_val_compare_and_swap( value, comp_val, new_val );
}

int main()
{
    return 0;
}

But i have the following error: (on both compilers):

$ ./sparc-unknown-linux-gnu-gcc test_cas.c -o test_cas
/tmp/ccREXHsP.o: In function `cmpxchg':
test_cas.c:(.text+0x24): undefined reference to `__sync_val_compare_and_swap_4'
collect2: ld returned 1 exit status

I try to find __sync_val_compare_and_swap_4: $ nm -A *.so | grep

__sync_val_compare_and_swap_4 
nm: libc.so: File format not recognized 
nm: libpthread.so: File format not recognized

I try to copile using __sync_val_compare_and_swap_4... But the same 
error :(
What's the problem? May be i wrong built compilers? May be Sparc 
architecture (SPARC v8) doesn't support this feature? I tried to compile 
my another programs - all good (compiled and executed).