Change Details

Don't build optimization atomic fetch nand functions when the required compiler builtin isn't available. This happens with CROSS_TOOLCHAIN set to llvm13 or earlier and WITHOUT_TOOLCHAIN defined.

Always fall back to the locked version of atomic_fetch_nand when the __c11_atomic_fetch_nand builtin isn't available (LLVM prior to 14).

Don't build optimizationAlways fall back to the locked version of atomic _fetch _nand functions when the requirede compiler__c11_atomic_fetch_nand builtin isn't available. This happens with CROSS_TOOLCHAIN set (LLVM prior to llvm13 or earlier and WITHOUT_TOOLCHAIN defined14).