diff --git a/base/base/phdr_cache.h b/base/base/phdr_cache.h
index b522710c4c4..a6e129db34d 100644
--- a/base/base/phdr_cache.h
+++ b/base/base/phdr_cache.h
@@ -8,6 +8,7 @@
   * As a drawback, this only works if no dynamic object unloading happens after this point.
   * This function is thread-safe. You should call it to update cache after loading new shared libraries.
   * Otherwise exception handling from dlopened libraries won't work (will call std::terminate immediately).
+  * NOTE: dlopen is forbidden in our code.
   *
   * NOTE: It is disabled with Thread Sanitizer because TSan can only use original "dl_iterate_phdr" function.
   */
diff --git a/programs/benchmark/clickhouse-benchmark.cpp b/programs/benchmark/clickhouse-benchmark.cpp
index 6bcb6e19b88..d58dd4dfbe7 100644
--- a/programs/benchmark/clickhouse-benchmark.cpp
+++ b/programs/benchmark/clickhouse-benchmark.cpp
@@ -1,2 +1 @@
 extern int mainEntryClickHouseBenchmark(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseBenchmark(argc_, argv_); }
diff --git a/programs/client/clickhouse-client.cpp b/programs/client/clickhouse-client.cpp
index 8f7da31d617..3e489c5ff15 100644
--- a/programs/client/clickhouse-client.cpp
+++ b/programs/client/clickhouse-client.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseClient(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseClient(argc_, argv_); }
diff --git a/programs/compressor/clickhouse-compressor.cpp b/programs/compressor/clickhouse-compressor.cpp
index f7d8611eac5..13a00ab6aff 100644
--- a/programs/compressor/clickhouse-compressor.cpp
+++ b/programs/compressor/clickhouse-compressor.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseCompressor(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseCompressor(argc_, argv_); }
diff --git a/programs/copier/clickhouse-copier.cpp b/programs/copier/clickhouse-copier.cpp
index 653a0128aa4..4dabb01775b 100644
--- a/programs/copier/clickhouse-copier.cpp
+++ b/programs/copier/clickhouse-copier.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseClusterCopier(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseClusterCopier(argc_, argv_); }
diff --git a/programs/disks/clickhouse-disks.cpp b/programs/disks/clickhouse-disks.cpp
index 184de86ee77..67ace2ddfd3 100644
--- a/programs/disks/clickhouse-disks.cpp
+++ b/programs/disks/clickhouse-disks.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseDisks(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseDisks(argc_, argv_); }
diff --git a/programs/extract-from-config/clickhouse-extract-from-config.cpp b/programs/extract-from-config/clickhouse-extract-from-config.cpp
index 95d119b0dad..9a384c8f2dc 100644
--- a/programs/extract-from-config/clickhouse-extract-from-config.cpp
+++ b/programs/extract-from-config/clickhouse-extract-from-config.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseExtractFromConfig(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseExtractFromConfig(argc_, argv_); }
diff --git a/programs/format/clickhouse-format.cpp b/programs/format/clickhouse-format.cpp
index 6bda5c5e039..71f2a071312 100644
--- a/programs/format/clickhouse-format.cpp
+++ b/programs/format/clickhouse-format.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseFormat(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseFormat(argc_, argv_); }
diff --git a/programs/git-import/clickhouse-git-import.cpp b/programs/git-import/clickhouse-git-import.cpp
index cfa06306604..57b66f3f77a 100644
--- a/programs/git-import/clickhouse-git-import.cpp
+++ b/programs/git-import/clickhouse-git-import.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseGitImport(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseGitImport(argc_, argv_); }
diff --git a/programs/keeper-converter/clickhouse-keeper-converter.cpp b/programs/keeper-converter/clickhouse-keeper-converter.cpp
index 3cb6f99f837..c84fc51f8cc 100644
--- a/programs/keeper-converter/clickhouse-keeper-converter.cpp
+++ b/programs/keeper-converter/clickhouse-keeper-converter.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseKeeperConverter(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseKeeperConverter(argc_, argv_); }
diff --git a/programs/library-bridge/CMakeLists.txt b/programs/library-bridge/CMakeLists.txt
index c5ef924b180..1cacc391ca5 100644
--- a/programs/library-bridge/CMakeLists.txt
+++ b/programs/library-bridge/CMakeLists.txt
@@ -9,6 +9,7 @@ set (CLICKHOUSE_LIBRARY_BRIDGE_SOURCES
     LibraryBridge.cpp
     LibraryBridgeHandlerFactory.cpp
     LibraryBridgeHandlers.cpp
+    SharedLibrary.cpp
     library-bridge.cpp
 )
 
diff --git a/programs/library-bridge/CatBoostLibraryHandler.h b/programs/library-bridge/CatBoostLibraryHandler.h
index e0ff1d70250..a20e1412552 100644
--- a/programs/library-bridge/CatBoostLibraryHandler.h
+++ b/programs/library-bridge/CatBoostLibraryHandler.h
@@ -7,12 +7,13 @@
 #include <Columns/ColumnVector.h>
 #include <Columns/ColumnsNumber.h>
 #include <Columns/IColumn.h>
-#include <Common/SharedLibrary.h>
 #include <base/defines.h>
+#include "SharedLibrary.h"
 
 #include <chrono>
 #include <mutex>
 
+
 namespace DB
 {
 
diff --git a/programs/library-bridge/ExternalDictionaryLibraryHandler.h b/programs/library-bridge/ExternalDictionaryLibraryHandler.h
index d6d4f926f0f..77c9b9fdf39 100644
--- a/programs/library-bridge/ExternalDictionaryLibraryHandler.h
+++ b/programs/library-bridge/ExternalDictionaryLibraryHandler.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <Common/SharedLibrary.h>
+#include "SharedLibrary.h"
 #include <Common/logger_useful.h>
 #include "ExternalDictionaryLibraryUtils.h"
 
diff --git a/src/Common/SharedLibrary.cpp b/programs/library-bridge/SharedLibrary.cpp
similarity index 95%
rename from src/Common/SharedLibrary.cpp
rename to programs/library-bridge/SharedLibrary.cpp
index 6104c96676a..d70709474b5 100644
--- a/src/Common/SharedLibrary.cpp
+++ b/programs/library-bridge/SharedLibrary.cpp
@@ -1,8 +1,7 @@
 #include "SharedLibrary.h"
 #include <string>
-#include <boost/core/noncopyable.hpp>
 #include <base/phdr_cache.h>
-#include "Exception.h"
+#include <Common/Exception.h>
 
 
 namespace DB
diff --git a/src/Common/SharedLibrary.h b/programs/library-bridge/SharedLibrary.h
similarity index 100%
rename from src/Common/SharedLibrary.h
rename to programs/library-bridge/SharedLibrary.h
diff --git a/programs/local/clickhouse-local.cpp b/programs/local/clickhouse-local.cpp
index 5cc98ab6067..4b17e89496d 100644
--- a/programs/local/clickhouse-local.cpp
+++ b/programs/local/clickhouse-local.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseLocal(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseLocal(argc_, argv_); }
diff --git a/programs/main.cpp b/programs/main.cpp
index fef0ad688e2..f1a714a9af9 100644
--- a/programs/main.cpp
+++ b/programs/main.cpp
@@ -422,6 +422,7 @@ int main(int argc_, char ** argv_)
     /// PHDR cache is required for query profiler to work reliably
     /// It also speed up exception handling, but exceptions from dynamically loaded libraries (dlopen)
     ///  will work only after additional call of this function.
+    /// Note: we forbid dlopen in our code.
     updatePHDRCache();
 
 #ifndef DISABLE_HARMFUL_ENV_VAR_CHECK
diff --git a/programs/obfuscator/clickhouse-obfuscator.cpp b/programs/obfuscator/clickhouse-obfuscator.cpp
index e57fa6d1b54..1f494223150 100644
--- a/programs/obfuscator/clickhouse-obfuscator.cpp
+++ b/programs/obfuscator/clickhouse-obfuscator.cpp
@@ -1,3 +1 @@
 int mainEntryClickHouseObfuscator(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseObfuscator(argc_, argv_); }
-
diff --git a/programs/server/clickhouse-server.cpp b/programs/server/clickhouse-server.cpp
index f49dc21d9fe..a7a3d8f00e3 100644
--- a/programs/server/clickhouse-server.cpp
+++ b/programs/server/clickhouse-server.cpp
@@ -1,24 +1 @@
-#include <new>
-
-#include <base/phdr_cache.h>
-
-
 int mainEntryClickHouseServer(int argc, char ** argv);
-
-/**
-  * This is the entry-point for the split build server. The initialization
-  * is copied from single-binary entry point in main.cpp.
-  */
-int main(int argc_, char ** argv_)
-{
-    /// Reset new handler to default (that throws std::bad_alloc)
-    /// It is needed because LLVM library clobbers it.
-    std::set_new_handler(nullptr);
-
-    /// PHDR cache is required for query profiler to work reliably
-    /// It also speed up exception handling, but exceptions from dynamically loaded libraries (dlopen)
-    ///  will work only after additional call of this function.
-    updatePHDRCache();
-
-    return mainEntryClickHouseServer(argc_, argv_);
-}
diff --git a/programs/static-files-disk-uploader/clickhouse-static-files-disk-uploader.cpp b/programs/static-files-disk-uploader/clickhouse-static-files-disk-uploader.cpp
index 063604b10b1..cf271f16a76 100644
--- a/programs/static-files-disk-uploader/clickhouse-static-files-disk-uploader.cpp
+++ b/programs/static-files-disk-uploader/clickhouse-static-files-disk-uploader.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseStaticFilesDiskUploader(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseStaticFilesDiskUploader(argc_, argv_); }
diff --git a/programs/su/clickhouse-su.cpp b/programs/su/clickhouse-su.cpp
index bb0967ca271..9459ccad0e8 100644
--- a/programs/su/clickhouse-su.cpp
+++ b/programs/su/clickhouse-su.cpp
@@ -1,2 +1 @@
 int mainEntryClickHouseSU(int argc, char ** argv);
-int main(int argc_, char ** argv_) { return mainEntryClickHouseSU(argc_, argv_); }