diff --git a/CMakeLists.txt b/CMakeLists.txt
deleted file mode 100644
index 75ba3bf532534fae123727e1b7984593301699cc..0000000000000000000000000000000000000000
--- a/CMakeLists.txt
+++ /dev/null
@@ -1,165 +0,0 @@
-# Copyright 2015 The RE2 Authors.  All Rights Reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-# Old enough to support Ubuntu Xenial.
-cmake_minimum_required(VERSION 3.5.1)
-
-project(RE2 CXX)
-include(CTest)
-include(GNUInstallDirs)
-
-if(NOT CMAKE_CXX_STANDARD)
-  set(CMAKE_CXX_STANDARD 11)
-  set(CMAKE_CXX_STANDARD_REQUIRED ON)
-endif()
-
-option(BUILD_SHARED_LIBS "build shared libraries" ON)
-option(USEPCRE "use PCRE in tests and benchmarks" OFF)
-
-# CMake seems to have no way to enable/disable testing per subproject,
-# so we provide an option similar to BUILD_TESTING, but just for RE2.
-option(RE2_BUILD_TESTING "enable testing for RE2" OFF)
-
-# ABI version
-# http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html
-set(SONAME 9)
-
-set(EXTRA_TARGET_LINK_LIBRARIES)
-
-if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
-  if(MSVC_VERSION LESS 1900)
-    message(FATAL_ERROR "you need Visual Studio 2015 or later")
-  endif()
-  if(BUILD_SHARED_LIBS)
-    # See http://www.kitware.com/blog/home/post/939 for details.
-    set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
-  endif()
-  # CMake defaults to /W3, but some users like /W4 (or /Wall) and /WX,
-  # so we disable various warnings that aren't particularly helpful.
-  add_compile_options(/wd4100 /wd4201 /wd4456 /wd4457 /wd4702 /wd4815)
-  # Without a byte order mark (BOM), Visual Studio assumes that the source
-  # file is encoded using the current user code page, so we specify UTF-8.
-  add_compile_options(/utf-8)
-endif()
-
-if(WIN32)
-  add_definitions(-DUNICODE -D_UNICODE -DSTRICT -DNOMINMAX)
-  add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS)
-elseif(UNIX)
-  set(THREADS_PREFER_PTHREAD_FLAG ON)
-  find_package(Threads REQUIRED)
-endif()
-
-if(USEPCRE)
-  add_definitions(-DUSEPCRE)
-  list(APPEND EXTRA_TARGET_LINK_LIBRARIES pcre)
-endif()
-
-add_subdirectory(regex-capi)
-include_directories(
-    ${CMAKE_CURRENT_SOURCE_DIR}/regex-capi/include
-)
-link_directories(${PROJECT_BINARY_DIR}/target/release)
-
-set(RE2_SOURCES
-    re2/filtered_re2.cc
-    re2/re2.cc
-    re2/set.cc
-    re2/stringpiece.cc
-    util/rune.cc
-    util/strutil.cc
-    )
-
-add_library(re2 ${RE2_SOURCES})
-target_include_directories(re2 PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>)
-set_target_properties(re2 PROPERTIES SOVERSION ${SONAME} VERSION ${SONAME}.0.0)
-add_library(re2::re2 ALIAS re2)
-
-add_dependencies(re2 librure)
-target_link_libraries(re2 PRIVATE rure)
-
-if(UNIX)
-  target_link_libraries(re2 PUBLIC Threads::Threads)
-endif()
-
-if(RE2_BUILD_TESTING)
-  set(TESTING_SOURCES
-      re2/testing/backtrack.cc
-      re2/testing/dump.cc
-      re2/testing/exhaustive_tester.cc
-      re2/testing/null_walker.cc
-      re2/testing/regexp_generator.cc
-      re2/testing/string_generator.cc
-      re2/testing/tester.cc
-      util/pcre.cc
-      )
-
-  add_library(testing STATIC ${TESTING_SOURCES})
-  target_link_libraries(testing PUBLIC re2)
-
-  set(TEST_TARGETS
-      charclass_test
-      compile_test
-      filtered_re2_test
-      mimics_pcre_test
-      parse_test
-      possible_match_test
-      re2_test
-      re2_arg_test
-      regexp_test
-      required_prefix_test
-      search_test
-      set_test
-      simplify_test
-      string_generator_test
-
-      dfa_test
-      exhaustive1_test
-      exhaustive2_test
-      exhaustive3_test
-      exhaustive_test
-      random_test
-      )
-
-  set(BENCHMARK_TARGETS
-      regexp_benchmark
-      )
-
-  foreach(target ${TEST_TARGETS})
-    add_executable(${target} re2/testing/${target}.cc util/test.cc)
-    target_link_libraries(${target} testing ${EXTRA_TARGET_LINK_LIBRARIES})
-    add_test(NAME ${target} COMMAND ${target})
-  endforeach()
-
-  foreach(target ${BENCHMARK_TARGETS})
-    add_executable(${target} re2/testing/${target}.cc util/benchmark.cc)
-    target_link_libraries(${target} testing ${EXTRA_TARGET_LINK_LIBRARIES})
-  endforeach()
-endif()
-
-set(RE2_HEADERS
-    re2/filtered_re2.h
-    re2/re2.h
-    re2/set.h
-    re2/stringpiece.h
-    )
-
-install(FILES regex-capi/include/rure.h
-        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
-install(FILES target/release/librure.so
-        DESTINATION ${CMAKE_INSTALL_LIBDIR})
-install(FILES ${RE2_HEADERS}
-        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/re2)
-install(TARGETS re2 EXPORT re2Config
-        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-        # RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-        INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
-# install(EXPORT re2Config
-#         DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/re2 NAMESPACE re2::)
-
-# add_executable(testinstall testinstall.cc)
-# link_directories(/usr/local/lib/)
-# add_dependencies(testinstall libre2)
-# target_link_libraries(testinstall re2)
diff --git a/README.md b/README.md
index 5ae1dd9f19eb5854012e7558aa6370ef538260c5..52125a640e081cb345144b9eed2e8c34f68a56aa 100644
--- a/README.md
+++ b/README.md
@@ -23,28 +23,19 @@ cd re2-rust
 make
 make install
 make test
-g++ ../testinstall.cc -o testinstall -lre2
+g++ testinstall.cc -o testinstall -lre2
 ./testinstall
 ```
 
 Ubuntu 20.04
 
 ``` Shell
-$ mkdir build && cd build
-$ cmake ..
 $ make
 $ sudo make install
-$ g++ ../testinstall.cc -o testinstall -lre2
+$ make test
+$ g++ testinstall.cc -o testinstall -lre2
 $ ./testinstall
 ```
-
-or
-
-
-``` Shell
-$ make
-$ sudo make install
-```
 使用rure库:
 
 ``` Shell