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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -113,11 +113,6 @@
   set(CMAKE_CXX_FLAGS_MINSIZEREL     "${CMAKE_CXX_FLAGS_MINSIZEREL} /O1 /Oi /Ob2 /Gy /MP /DNDEBUG ${MY_CXX_WARNING_FLAGS}")
   set(CMAKE_CXX_FLAGS_RELEASE        "${CMAKE_CXX_FLAGS_RELEASE} /O2 /Oi /Ob2 /Gy /MP /DNDEBUG ${MY_CXX_WARNING_FLGAS}")
   set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /O2 /Oi /Ob2 /Gy /MP /Zi ${MY_CXX_WARNING_FLAGS}")
-else()
-  set(CMAKE_CXX_FLAGS_DEBUG          "${CMAKE_CXX_FLAGS_DEBUG} -O0 -g ${MY_CXX_WARNING_FLAGS}")
-  set(CMAKE_CXX_FLAGS_MINSIZEREL     "${CMAKE_CXX_FLAGS_MINSIZEREL} -Os -DNDEBUG ${MY_CXX_WARNING_FLAGS}")
-  set(CMAKE_CXX_FLAGS_RELEASE        "${CMAKE_CXX_FLAGS_RELEASE} -O3 -DNDEBUG ${MY_CXX_WARNING_FLGAS}")
-  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -O2 -g ${MY_CXX_WARNING_FLAGS}")
 endif()
 
 # Compiler-specific C++17 activation.
@@ -220,16 +215,8 @@
 
 endif(ANTLR4_INSTALL)
 
-if(EXISTS LICENSE.txt)
-install(FILES LICENSE.txt
-        DESTINATION "share/doc/libantlr4")
-elseif(EXISTS ../../LICENSE.txt)
-install(FILES ../../LICENSE.txt
-    DESTINATION "share/doc/libantlr4")
-endif()
-
 install(FILES README.md VERSION
-    DESTINATION "share/doc/libantlr4")
+    DESTINATION ${CMAKE_INSTALL_DOCDIR})
 
 set(CPACK_PACKAGE_CONTACT "antlr-discussion@googlegroups.com")
 set(CPACK_PACKAGE_VERSION ${ANTLR_VERSION})
--- a/runtime/CMakeLists.txt
+++ b/runtime/CMakeLists.txt
@@ -26,29 +26,14 @@
 )
 
 add_library(antlr4_shared SHARED ${libantlrcpp_SRC})
-add_library(antlr4_static STATIC ${libantlrcpp_SRC})
 
 # Make sure to link against threads (pthreads) library in order to be able to
 # make use of std::call_once in the code without producing runtime errors
 # (see also https://github.com/antlr/antlr4/issues/3708 and/or https://stackoverflow.com/q/51584960).
 find_package(Threads REQUIRED)
 target_link_libraries(antlr4_shared Threads::Threads)
-target_link_libraries(antlr4_static Threads::Threads)
 
 if (ANTLR_BUILD_CPP_TESTS)
-  include(FetchContent)
-
-  FetchContent_Declare(
-    googletest
-    URL https://github.com/google/googletest/archive/e2239ee6043f73722e7aa812a459f54a28552929.zip
-  )
-
-  if(WITH_STATIC_CRT)
-    set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-  endif()
-
-  FetchContent_MakeAvailable(googletest)
-
   file(GLOB libantlrcpp_TESTS
     "${PROJECT_SOURCE_DIR}/runtime/tests/*.cpp"
   )
@@ -60,8 +45,9 @@
 
   target_link_libraries(
     antlr4_tests
-    antlr4_static
+    antlr4_shared
     gtest_main
+    gtest
   )
 
   include(GoogleTest)
@@ -71,7 +57,6 @@
 
 if(APPLE)
   target_link_libraries(antlr4_shared ${COREFOUNDATION_LIBRARY})
-  target_link_libraries(antlr4_static ${COREFOUNDATION_LIBRARY})
 endif()
 
 if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
@@ -88,16 +73,11 @@
 endif()
 
 set(extra_share_compile_flags "")
-set(extra_static_compile_flags "")
-set(static_lib_suffix "")
 
 if (WIN32)
-  set(static_lib_suffix "-static")
   target_compile_definitions(antlr4_shared PUBLIC ANTLR4CPP_EXPORTS)
-  target_compile_definitions(antlr4_static PUBLIC ANTLR4CPP_STATIC)
   if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
     set(extra_share_compile_flags "-MP /wd4251")
-    set(extra_static_compile_flags "-MP")
   endif()
 endif()
 
@@ -107,13 +87,6 @@
                                  OUTPUT_NAME antlr4-runtime
                                  COMPILE_FLAGS "${disabled_compile_warnings} ${extra_share_compile_flags}")
 
-set_target_properties(antlr4_static
-                      PROPERTIES VERSION   ${ANTLR_VERSION}
-                                 SOVERSION ${ANTLR_VERSION}
-                                 OUTPUT_NAME "antlr4-runtime${static_lib_suffix}"
-                                 COMPILE_PDB_NAME "antlr4-runtime${static_lib_suffix}"
-                                 COMPILE_FLAGS "${disabled_compile_warnings} ${extra_static_compile_flags}")
-
 if (ANTLR_BUILD_CPP_TESTS)
   # Copy the generated binaries to dist folder (required by test suite)
   add_custom_command(
@@ -122,24 +95,12 @@
     COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_HOME_DIRECTORY}/dist
     COMMAND ${CMAKE_COMMAND} -E copy_if_different $<TARGET_FILE:antlr4_shared> ${CMAKE_HOME_DIRECTORY}/dist
     COMMAND ${CMAKE_COMMAND} -E copy_if_different $<TARGET_LINKER_FILE:antlr4_shared> ${CMAKE_HOME_DIRECTORY}/dist)
-  
-  add_custom_command(
-    TARGET antlr4_static
-    POST_BUILD
-    COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_HOME_DIRECTORY}/dist
-    COMMAND ${CMAKE_COMMAND} -E copy_if_different $<TARGET_FILE:antlr4_static> ${CMAKE_HOME_DIRECTORY}/dist)
 endif()
 
 install(TARGETS antlr4_shared
         EXPORT antlr4-targets
         ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
         LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-
-install(TARGETS antlr4_static
-        EXPORT antlr4-targets
-        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
         RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 install(DIRECTORY "${PROJECT_SOURCE_DIR}/runtime/src/"