diff --git a/asio/.CMakeUserPresets.json b/asio/.CMakeUserPresets.json
index 1edd3e3934..b002ab47c2 100644
--- a/asio/.CMakeUserPresets.json
+++ b/asio/.CMakeUserPresets.json
@@ -72,13 +72,18 @@
       "name": "dev",
       "configurePreset": "dev",
       "configuration": "Debug",
-      "jobs": 12
+      "jobs": 12,
+      "targets": [
+        "install"
+      ]
     },
     {
       "name": "verify",
       "configurePreset": "dev",
       "jobs": 12,
-      "targets": ["all_verify_interface_header_sets"]
+      "targets": [
+        "all_verify_interface_header_sets"
+      ]
     }
   ],
   "testPresets": [
diff --git a/asio/.cmakefiles.txt b/asio/.cmakefiles.txt
index ec21cb1329..ef19448afe 100644
--- a/asio/.cmakefiles.txt
+++ b/asio/.cmakefiles.txt
@@ -37,6 +37,7 @@ cmake/spell-targets.cmake
 cmake/spell.cmake
 cmake/variables.cmake
 cmake/windows-set-path.cmake
+src/examples/CMakeLists.txt
 src/tests/CMakeLists.txt
 '
 
diff --git a/asio/CMakeLists.txt b/asio/CMakeLists.txt
index 1f6c26550a..de6432b037 100644
--- a/asio/CMakeLists.txt
+++ b/asio/CMakeLists.txt
@@ -26,6 +26,8 @@ endif()
 
 option(ASIO_SEPARATE_COMPILATION "build asio lib too" ${PROJECT_IS_TOP_LEVEL})
 
+set(CMAKE_DEBUG_POSTFIX D)
+
 # ---- add dependency libraries ----
 
 find_package(Threads REQUIRED)
@@ -64,7 +66,7 @@ if(ASIO_SEPARATE_COMPILATION)
 
   # FIXME: some header in include/asio/detail fails CMAKE_VERIFY_INTERFACE_HEADER_SETS!
   # NOTE: we need them installed, but we used them install with asio_header INTERFACE! CK
-  set(_public_headers ${_asio_headers})
+  set(_public_headers include/asio.hpp ${_asio_headers})
   list(FILTER _public_headers EXCLUDE REGEX [=[.*/detail/.*\.hpp]=])
   list(FILTER _public_headers EXCLUDE REGEX [=[.*/impl/.*\.hpp]=])
   list(FILTER _public_headers EXCLUDE REGEX [=[.*/spawn.*\.hpp]=])
diff --git a/asio/CMakePresets.json b/asio/CMakePresets.json
index 4cddbf9df9..d3dd114d49 100644
--- a/asio/CMakePresets.json
+++ b/asio/CMakePresets.json
@@ -50,7 +50,7 @@
       "hidden": true,
       "cacheVariables": {
         "CMAKE_CXX_EXTENSIONS": "OFF",
-        "CMAKE_CXX_STANDARD": "17",
+        "CMAKE_CXX_STANDARD": "20",
         "CMAKE_CXX_STANDARD_REQUIRED": "ON"
       }
     },
@@ -177,6 +177,13 @@
     {
       "name": "ci-build",
       "binaryDir": "${sourceDir}/build",
+      "installDir": "${sourceDir}/stagedir",
+      "cacheVariables": {
+        "CMAKE_PREFIX_PATH": {
+          "type": "path",
+          "value": "${sourceDir}/stagedir"
+        }
+      },
       "hidden": true
     },
     {
diff --git a/asio/cmake/dev-mode.cmake b/asio/cmake/dev-mode.cmake
index 2817aff274..d8e86da20a 100644
--- a/asio/cmake/dev-mode.cmake
+++ b/asio/cmake/dev-mode.cmake
@@ -3,7 +3,9 @@ include(cmake/folders.cmake)
 option(ASIO_BUILD_TESTING "Use ctest" ON)
 if(ASIO_BUILD_TESTING)
   enable_testing()
+
   add_subdirectory(src/tests)
+  add_subdirectory(src/examples)
 endif()
 
 option(ASIO_BUILD_MCSS_DOCS "Build documentation using Doxygen and m.css" OFF)
diff --git a/asio/cmake/install-rules.cmake b/asio/cmake/install-rules.cmake
index fa920450bc..9e2b2bf2dd 100644
--- a/asio/cmake/install-rules.cmake
+++ b/asio/cmake/install-rules.cmake
@@ -1,6 +1,6 @@
-if(PROJECT_IS_TOP_LEVEL)
-  set(CMAKE_INSTALL_INCLUDEDIR "include/asio-${PROJECT_VERSION}" CACHE PATH "")
-endif()
+# if(PROJECT_IS_TOP_LEVEL)
+# NO!   set(CMAKE_INSTALL_INCLUDEDIR "include/asio-${PROJECT_VERSION}" CACHE PATH "")
+# endif()
 
 # Project is configured with no languages, so tell GNUInstallDirs the lib dir
 set(CMAKE_INSTALL_LIBDIR lib CACHE PATH "")
@@ -10,6 +10,9 @@ include(cmake/AddUninstallTarget.cmake)
 include(CMakePackageConfigHelpers)
 include(GNUInstallDirs)
 
+# Print Installing but not Up-to-date messages.
+set(CMAKE_INSTALL_MESSAGE LAZY)
+
 # find_package(<package) call for consumers to find this project
 set(_package asio)
 
@@ -25,7 +28,7 @@ endif()
 write_basic_package_version_file("${_package}ConfigVersion.cmake" COMPATIBILITY SameMajorVersion ARCH_INDEPENDENT)
 
 # Allow package maintainers to freely override the path for the configs
-set(ASIO_INSTALL_CMAKEDIR "${CMAKE_INSTALL_DATADIR}/${_package}"
+set(ASIO_INSTALL_CMAKEDIR "${CMAKE_INSTALL_LIBDIR}/cmake/${_package}"
     CACHE PATH "CMake package config location relative to the install prefix"
 )
 mark_as_advanced(ASIO_INSTALL_CMAKEDIR)
diff --git a/asio/cmake/lint-targets.cmake b/asio/cmake/lint-targets.cmake
index 518e046ec4..cf79d3b032 100644
--- a/asio/cmake/lint-targets.cmake
+++ b/asio/cmake/lint-targets.cmake
@@ -1,4 +1,4 @@
-set(FORMAT_PATTERNS src/*.cpp src/*.hpp include/*.hpp tests/*.cpp tests/*.hpp
+set(ACIO_FORMAT_PATTERNS *.json # src/*.cpp src/*.hpp include/*.hpp tests/*.cpp tests/*.hpp
     CACHE STRING "; separated patterns relative to the project source dir to format"
 )
 
@@ -6,7 +6,7 @@ set(FORMAT_COMMAND clang-format CACHE STRING "Formatter to use")
 
 add_custom_target(
   format-check
-  COMMAND "${CMAKE_COMMAND}" -D "FORMAT_COMMAND=${FORMAT_COMMAND}" -D "PATTERNS=${FORMAT_PATTERNS}" -P
+  COMMAND "${CMAKE_COMMAND}" -D "FORMAT_COMMAND=${FORMAT_COMMAND}" -D "PATTERNS=${ACIO_FORMAT_PATTERNS}" -P
           "${PROJECT_SOURCE_DIR}/cmake/lint.cmake"
   WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
   COMMENT "Linting the code"
@@ -15,7 +15,7 @@ add_custom_target(
 
 add_custom_target(
   format-fix
-  COMMAND "${CMAKE_COMMAND}" -D "FORMAT_COMMAND=${FORMAT_COMMAND}" -D "PATTERNS=${FORMAT_PATTERNS}" -D FIX=YES -P
+  COMMAND "${CMAKE_COMMAND}" -D "FORMAT_COMMAND=${FORMAT_COMMAND}" -D "PATTERNS=${ACIO_FORMAT_PATTERNS}" -D FIX=YES -P
           "${PROJECT_SOURCE_DIR}/cmake/lint.cmake"
   WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
   COMMENT "Fixing the code"
diff --git a/asio/src/examples/CMakeLists.txt b/asio/src/examples/CMakeLists.txt
new file mode 100644
index 0000000000..c524405a7f
--- /dev/null
+++ b/asio/src/examples/CMakeLists.txt
@@ -0,0 +1,19 @@
+cmake_minimum_required(VERSION 3.25...3.31)
+
+project(asio_examples LANGUAGES CXX)
+
+if(PROJECT_IS_TOP_LEVEL)
+  find_package(asio 1.32.0.1 EXACT REQUIRED)
+  enable_testing()
+endif()
+
+set(ALL_EXAMPLES callback_wrapper)
+
+message(STATUS "Examples to be built: ${ALL_EXAMPLES}")
+
+foreach(example ${ALL_EXAMPLES})
+  add_executable(${example})
+  target_sources(${example} PRIVATE cpp20/operations/${example}.cpp)
+  target_link_libraries(${example} asio::asio_header)
+  add_test(NAME ${example} COMMAND echo Test | ${example})
+endforeach()
diff --git a/asio/src/tests/CMakeLists.txt b/asio/src/tests/CMakeLists.txt
index 112402121d..6b1aa9e0e1 100644
--- a/asio/src/tests/CMakeLists.txt
+++ b/asio/src/tests/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.23...3.29)
+cmake_minimum_required(VERSION 3.25...3.31)
 
 project(asio_test LANGUAGES CXX)
 
@@ -9,7 +9,7 @@ include(../../cmake/windows-set-path.cmake OPTIONAL)
 # ---- Dependencies ----
 
 if(PROJECT_IS_TOP_LEVEL)
-  find_package(asio REQUIRED)
+  find_package(asio 1.32.0 EXACT REQUIRED)
   enable_testing()
 endif()
 
@@ -18,9 +18,29 @@ endif()
 add_executable(asio_test unit/read_until.cpp)
 
 if(TARGET asio::asio)
-  target_link_libraries(asio_test PRIVATE asio::asio)
+  target_link_libraries(asio_test asio::asio)
 else()
-  target_link_libraries(asio_test PRIVATE asio::asio_header)
+  target_link_libraries(asio_test asio::asio_header)
+endif()
+
+if(NOT PROJECT_IS_TOP_LEVEL)
+  if(NOT DEFINED CMAKE_PREFIX_PATH)
+    set(CMAKE_PREFIX_PATH ${CMAKE_INSTALL_PREFIX})
+  endif()
+
+  # test if the targets are findable from the build directory
+  # NOTE: For an INTERFACE library and multi config generators, we may always use
+  # the -C Debug config type instead of  $<CONFIG> to prevent problems! CK
+  if(CMAKE_BUILD_TYPE STREQUAL Debug)
+    add_test(
+      NAME find-package-test
+      COMMAND ${CMAKE_CTEST_COMMAND} --verbose --output-on-failure -C Debug --build-and-test
+              "${CMAKE_SOURCE_DIR}/src/examples" "${CMAKE_CURRENT_BINARY_DIR}/find-package-test" --build-generator
+              ${CMAKE_GENERATOR} --build-makeprogram ${CMAKE_MAKE_PROGRAM} --build-options
+              "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}" "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
+              "-DCMAKE_BUILD_TYPE=Debug" "-DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}"
+    )
+  endif()
 endif()
 
 # ---- Setup strict Compiler Warnings ----