**Use case**

https://colab.research.google.com/drive/1wzYn59PA9EDyra6356a8rUpwd3zUX0Zt?usp=sharing

**Describe the solution you'd like**

There are multiple ways to prevent LD_PRELOAD:

- link statically with musl to prevent any chance for LD_PRELOAD working;
- add some flag to the binary like capabilities or setuid to also prevent LD_PRELOAD working;
- don't allow it with some env variable;
- implement our own dynamic loader.

Also possible workaround:

- check if LD_PRELOAD is set very early at program startup. If it is, reset it and exec ourself with the same argc, argv.
#include <Common/getHashOfLoadedBinary.h>
#include <Common/IO.h>
#include <base/phdr_cache.h>
#include <base/scope_guard.h>
#if ENABLE_CLICKHOUSE_SERVER
int mainEntryClickHouseServer(int argc, char ** argv);
#endif
#if ENABLE_CLICKHOUSE_CLIENT
int mainEntryClickHouseClient(int argc, char ** argv);
#endif
#if ENABLE_CLICKHOUSE_LOCAL
int mainEntryClickHouseLocal(int argc, char ** argv);
#endif
#if ENABLE_CLICKHOUSE_BENCHMARK
int mainEntryClickHouseBenchmark(int argc, char ** argv);
#endif
#if ENABLE_CLICKHOUSE_EXTRACT_FROM_CONFIG
int mainEntryClickHouseExtractFromConfig(int argc, char ** argv);
#endif
#if ENABLE_CLICKHOUSE_COMPRESSOR
int mainEntryClickHouseCompressor(int argc, char ** argv);
#endif
#if ENABLE_CLICKHOUSE_FORMAT
int mainEntryClickHouseFormat(int argc, char ** argv);
#endif
#if ENABLE_CLICKHOUSE_COPIER
int mainEntryClickHouseClusterCopier(int argc, char ** argv);
#endif
#if ENABLE_CLICKHOUSE_OBFUSCATOR
int mainEntryClickHouseObfuscator(int argc, char ** argv);