Ubuntu 20.10 has glibc 2.32 and ClickHouse built in a plain way has two symbols marked GLIBC_2.32,
namely
 
```
 ilejn@ilejn-Latitude-5400:~/projects/ClickHouse/build$ objdump -T ./programs/clickhouse | grep GLIBC_2.32
 0000000000000000      DF *UND*  0000000000000000  GLIBC_2.32  pthread_sigmask
 0000000000000000      DF *UND*  0000000000000000  GLIBC_2.32  pthread_getattr_np
```
{
    static bool supports = supportsRenameat2Impl();
    return supports;
}
#else
#define RENAME_NOREPLACE -1
#define RENAME_EXCHANGE -1
static bool renameat2(const std::string &, const std::string &, int)
{
    return false;
}
bool supportsRenameat2()
{
    return false;
}
#endif
static void renameNoReplaceFallback(const std::string & old_path, const std::string & new_path)