diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..4eec7e7
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,21 @@
+cmake_minimum_required(VERSION 3.18)
+project(tools)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Werror -pedantic-errors -O0")
+set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Werror -pedantic-errors")
+
+file(GLOB items RELATIVE ${PROJECT_SOURCE_DIR} ${PROJECT_SOURCE_DIR}/*)
+foreach(item ${items})
+    string(REGEX MATCH "^[^\.].*" dot ${item})
+    if(("${dot}" STREQUAL "") OR (${item}  STREQUAL "build"))
+        continue()
+    endif()
+    if(IS_DIRECTORY ${PROJECT_SOURCE_DIR}/${item})
+        message(STATUS ${item})
+        add_subdirectory(${PROJECT_SOURCE_DIR}/${item})
+    endif()
+endforeach()
diff --git a/loop_per_thread/Makefile b/Makefile
similarity index 94%
rename from loop_per_thread/Makefile
rename to Makefile
index 08012c1..9718099 100644
--- a/loop_per_thread/Makefile
+++ b/Makefile
@@ -20,4 +20,4 @@ all:
 	cd build && cmake -DCMAKE_BUILD_TYPE=$(FLAG) .. && cmake --build . -- -j$(JOBS)
 
 clean:
-	@rm -rf bin build lib
+	@rm -rf build
diff --git a/bloom/CMakeLists.txt b/bloom/CMakeLists.txt
index 5d73bf8..09160db 100644
--- a/bloom/CMakeLists.txt
+++ b/bloom/CMakeLists.txt
@@ -1,12 +1,4 @@
-cmake_minimum_required(VERSION 3.15)
-project(bloom)
-
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(CMAKE_CXX_EXTENSIONS OFF)
-
-include_directories(${PROJECT_SOURCE_DIR}/murmur3)
-
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/murmur3)
 add_subdirectory(murmur3)
 add_executable(bloom bloom.h main.cpp)
 target_link_libraries(bloom murmur3)
\ No newline at end of file
diff --git a/cfg/CMakeLists.txt b/cfg/CMakeLists.txt
new file mode 100644
index 0000000..1310350
--- /dev/null
+++ b/cfg/CMakeLists.txt
@@ -0,0 +1 @@
+add_executable(hash test_hash.cpp)
\ No newline at end of file
diff --git a/channel/CMakeLists.txt b/channel/CMakeLists.txt
new file mode 100644
index 0000000..bb9f3ef
--- /dev/null
+++ b/channel/CMakeLists.txt
@@ -0,0 +1,3 @@
+find_package(Threads)
+add_executable(mpsc test.cpp)
+target_link_libraries(mpsc Threads::Threads)
\ No newline at end of file
diff --git a/coroutine/CMakeLists.txt b/coroutine/CMakeLists.txt
index 9dee993..6565af7 100644
--- a/coroutine/CMakeLists.txt
+++ b/coroutine/CMakeLists.txt
@@ -1,7 +1,3 @@
-cmake_minimum_required(VERSION 3.10)
-project(coroutine)
-
-set(CMAKE_CXX_STANDARD 17)
 enable_language(ASM_NASM)
 
 set(SWITCH_STACK switch_stack.asm)
diff --git a/crypt/CMakeLists.txt b/crypt/CMakeLists.txt
index 6e60151..65d3f35 100644
--- a/crypt/CMakeLists.txt
+++ b/crypt/CMakeLists.txt
@@ -1,13 +1,2 @@
-cmake_minimum_required(VERSION 3.6)
-project(crypto CXX)
-
-set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
-set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -O0")
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -s -Wall")
-SET(BUILD_SHARED_LIBRARIES OFF)
-SET(CMAKE_EXE_LINKER_FLAGS "-static")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++14")
-
 add_executable(decrypt decrypt.cpp)
-
-add_executable(encrypt encrypt.cpp)
+add_executable(encrypt encrypt.cpp)
\ No newline at end of file
diff --git a/crypt/encrypt.cpp b/crypt/encrypt.cpp
index d58c563..696f20a 100644
--- a/crypt/encrypt.cpp
+++ b/crypt/encrypt.cpp
@@ -51,4 +51,4 @@ int main(int argc, char* argv[])
   of.write("\t", 1);
   of << res;
   of.close();
-};
+}
diff --git a/fake_variant/CMakeLists.txt b/fake_variant/CMakeLists.txt
new file mode 100644
index 0000000..c9615e2
--- /dev/null
+++ b/fake_variant/CMakeLists.txt
@@ -0,0 +1 @@
+add_executable(fake_variant test.cpp)
\ No newline at end of file
diff --git a/file_sort/CMakeLists.txt b/file_sort/CMakeLists.txt
new file mode 100644
index 0000000..30438b1
--- /dev/null
+++ b/file_sort/CMakeLists.txt
@@ -0,0 +1,3 @@
+add_executable(file_sort_bit bit.cpp)
+add_executable(file_sort_bs bs.cpp)
+add_executable(file_sort_rand rand.cpp)
\ No newline at end of file
diff --git a/file_sort/bs.cpp b/file_sort/bs.cpp
index 27c27f8..a295846 100644
--- a/file_sort/bs.cpp
+++ b/file_sort/bs.cpp
@@ -87,9 +87,9 @@ class Bigdata
     FILE* fd = fopen(out_.c_str(), "w");
     if(fd == nullptr)
       failure(__func__, __LINE__);
-    FILE* fds[count_];
-    long data[count_];
-    bool done[count_];
+    std::vector<FILE*> fds(count_);
+    std::vector<long> data(count_);
+    std::vector<bool> done(count_);
     char name[50];
     for(long i = 0; i < count_; ++i)
     {
diff --git a/fm/CMakeLists.txt b/fm/CMakeLists.txt
new file mode 100644
index 0000000..2fe8c02
--- /dev/null
+++ b/fm/CMakeLists.txt
@@ -0,0 +1 @@
+add_executable(functor_map test.cpp)
\ No newline at end of file
diff --git a/form_parser/CMakeLists.txt b/form_parser/CMakeLists.txt
index 4a322be..5c43ce7 100644
--- a/form_parser/CMakeLists.txt
+++ b/form_parser/CMakeLists.txt
@@ -1,6 +1 @@
-cmake_minimum_required(VERSION 3.10)
-project(form_parser)
-
-set(CMAKE_CXX_STANDARD 11)
-
 add_executable(form_parser form_parser.h main.cpp)
\ No newline at end of file
diff --git a/json/CMakeLists.txt b/json/CMakeLists.txt
index 84a60be..ee7fefd 100644
--- a/json/CMakeLists.txt
+++ b/json/CMakeLists.txt
@@ -1,6 +1 @@
-cmake_minimum_required(VERSION 3.19)
-project(json)
-
-set(CMAKE_CXX_STANDARD 17)
-
 add_executable(json json.h main.cpp)
\ No newline at end of file
diff --git a/logging/CMakeLists.txt b/logging/CMakeLists.txt
index d0d6966..2b8fa3f 100644
--- a/logging/CMakeLists.txt
+++ b/logging/CMakeLists.txt
@@ -1,12 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
-project(logging)
-
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Werror -pedantic-errors -O0")
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Werror -pedantic-errors")
-
-set(SOURCE_FILES
-    logging.h test.cpp)
+set(SOURCE_FILES logging.h test.cpp)
 
 add_executable(logging_test ${SOURCE_FILES})
 target_link_libraries(logging_test pthread)
diff --git a/loop_per_thread/CMakeLists.txt b/loop_per_thread/CMakeLists.txt
index 61f9801..06561be 100644
--- a/loop_per_thread/CMakeLists.txt
+++ b/loop_per_thread/CMakeLists.txt
@@ -1,11 +1,3 @@
-cmake_minimum_required(VERSION 3.6)
-project(loop_per_thread CXX)
-
-set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
-set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -O0")
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -s -Wall")
-
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++14")
 find_package(Boost 1.61 REQUIRED system)
 
 add_executable(server server.cpp)
diff --git a/loop_per_thread/server1.cpp b/loop_per_thread/server1.cpp
index 8a3abfe..ef7990c 100644
--- a/loop_per_thread/server1.cpp
+++ b/loop_per_thread/server1.cpp
@@ -9,9 +9,11 @@
 #include <thread>
 #include <boost/asio.hpp>
 
-class Service : boost::noncopyable, public std::enable_shared_from_this<Service>
+class Service : public std::enable_shared_from_this<Service>
 {
 public:
+  Service(const Service&) = delete;
+  Service& operator=(const Service&) = delete;
   Service(std::shared_ptr<boost::asio::ip::tcp::socket> sock) : socket_(sock), msg_("pong\n") {}
 
   static std::shared_ptr<Service> make_service(std::shared_ptr<boost::asio::ip::tcp::socket> sock)
@@ -64,7 +66,7 @@ class Service : boost::noncopyable, public std::enable_shared_from_this<Service>
   }
 };
 
-class Acceptor : boost::noncopyable
+class Acceptor
 {
 public:
   Acceptor(boost::asio::io_service* io, boost::asio::ip::tcp::endpoint&& ep)
@@ -73,6 +75,9 @@ class Acceptor : boost::noncopyable
     std::atomic_init(&is_quit_, false);
   }
 
+  Acceptor(const Acceptor&) = delete;
+  Acceptor& operator=(const Acceptor&) = delete;
+
   void start()
   {
     acceptor_.listen(SOMAXCONN); // default SOMAXCONN is 128
diff --git a/meta/CMakeLists.txt b/meta/CMakeLists.txt
new file mode 100644
index 0000000..e69de29
diff --git a/optional/CMakeLists.txt b/optional/CMakeLists.txt
index dbd86c4..53a0289 100644
--- a/optional/CMakeLists.txt
+++ b/optional/CMakeLists.txt
@@ -1,7 +1 @@
-cmake_minimum_required(VERSION 3.10)
-project(optional CXX)
-
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
-add_executable(optional optional.h main.cpp)
+add_executable(optional optional.h main.cpp)
\ No newline at end of file
diff --git a/rbtree/CMakeLists.txt b/rbtree/CMakeLists.txt
index 4d7be8b..dd2f8b5 100644
--- a/rbtree/CMakeLists.txt
+++ b/rbtree/CMakeLists.txt
@@ -1,7 +1,2 @@
-cmake_minimum_required(VERSION 3.7)
-project(rbtree)
-
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
-
 set(SOURCE_FILES test.cpp)
 add_executable(rbtree ${SOURCE_FILES})
diff --git a/router/CMakeLists.txt b/router/CMakeLists.txt
index 606a238..ebb0e2f 100644
--- a/router/CMakeLists.txt
+++ b/router/CMakeLists.txt
@@ -1,10 +1,3 @@
-cmake_minimum_required(VERSION 3.15)
-project(router)
-
-set(CMAKE_CXX_STANDARD 20)
-
-set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
-
 add_executable(trie trie.cc)
 add_executable(radix radix.cc)
 add_executable(3way 3way.cc)
diff --git a/signal/CMakeLists.txt b/signal/CMakeLists.txt
new file mode 100644
index 0000000..b05f816
--- /dev/null
+++ b/signal/CMakeLists.txt
@@ -0,0 +1,3 @@
+add_executable(signal_call signal_call_test.cpp)
+add_executable(signal1 signal1.cpp)
+add_executable(signal2 signal2.cpp)
\ No newline at end of file
diff --git a/string_ext/CMakeLists.txt b/string_ext/CMakeLists.txt
new file mode 100644
index 0000000..388fe76
--- /dev/null
+++ b/string_ext/CMakeLists.txt
@@ -0,0 +1,6 @@
+add_executable(string_ext test.cpp)
+add_custom_command(
+        TARGET string_ext POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy
+                ${CMAKE_CURRENT_SOURCE_DIR}/ip.txt
+                ${CMAKE_CURRENT_BINARY_DIR}/ip.txt)
\ No newline at end of file
diff --git a/threadpool/CMakeLists.txt b/threadpool/CMakeLists.txt
new file mode 100644
index 0000000..0a34864
--- /dev/null
+++ b/threadpool/CMakeLists.txt
@@ -0,0 +1,3 @@
+find_package(Threads)
+add_executable(threadpool test_threadpool.cpp)
+target_link_libraries(threadpool Threads::Threads)
\ No newline at end of file
diff --git a/variant/CMakeLists.txt b/variant/CMakeLists.txt
index 3456564..b46df1c 100644
--- a/variant/CMakeLists.txt
+++ b/variant/CMakeLists.txt
@@ -1,7 +1,3 @@
-cmake_minimum_required(VERSION 3.7)
-project(variant)
-
 set(CMAKE_CXX_STANDARD 11)
-
 set(SOURCE_FILES variant.h test.cpp)
-add_executable(variant ${SOURCE_FILES})
+add_executable(variant ${SOURCE_FILES})
\ No newline at end of file