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POundefined reference to `__sync_val_compare_and_swap_4' error at compilation, using gcc 4.1.1 and 4.2.0 for Sparc v8 target
 

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  1. POundefined reference to `__sync_val_compare_and_swap_4' error at compilation, using gcc 4.1.1 and 4.2.0 for Sparc v8 target
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    <p>Using <a href="http://kegel.com/crosstool/" rel="nofollow">crosstool</a> scripts i've built under <a href="http://www.cygwin.com/" rel="nofollow">Cygwin</a> the following compilers gcc-4.1.1 and 4.2.0 20061024 (prerelease) for Sparc architecture:</p> <pre><code>$ ./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 </code></pre> <p>and</p> <pre><code>$ ./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) </code></pre> <p>It is necessary for me that i can use in my programs <code>__sync_val_compare_and_swap</code> function related to the <a href="http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Atomic-Builtins.html" rel="nofollow">Atomic-Builtins</a>, which supports whith 4.1.* version of gcc.</p> <p>I try to compile simple C code:</p> <pre><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; } </code></pre> <p>But i have the following error: (on both compilers):</p> <pre><code>$ ./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 </code></pre> <p>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).</p>
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