diff --git a/.cmake-format b/.cmake-format
index 8c355cf..02aa5d3 100644
--- a/.cmake-format
+++ b/.cmake-format
@@ -40,10 +40,16 @@ parse:
         flags: []
       spelling: CPMFindPackage
       kwargs: *cpmaddpackagekwargs
-    packageproject:
+    cpmdeclarepackage:
       pargs:
         nargs: '*'
         flags: []
+      spelling: CPMDeclarePackage
+      kwargs: *cpmaddpackagekwargs
+    packageproject:
+      pargs:
+        nargs: '*'
+        flags: [NO_VERSION_SUFFIX]
       spelling: packageProject
       kwargs:
         NAME: 1
@@ -55,3 +61,12 @@ parse:
         COMPATIBILITY: 1
         VERSION_HEADER: 1
         DEPENDENCIES: +
+    cpmusepackagelock:
+      pargs: 1
+      spelling: CPMUsePackageLock
+    cpmregisterpackage:
+      pargs: 1
+      spelling: CPMRegisterPackage
+    cpmgetpackageversion:
+      pargs: 2
+      spelling: CPMGetPackageVersion
diff --git a/.github/workflows/install.yml b/.github/workflows/install.yml
index 606dddd..d8186f6 100644
--- a/.github/workflows/install.yml
+++ b/.github/workflows/install.yml
@@ -1,12 +1,15 @@
+---
 name: Install
 
 on:
   push:
     branches:
       - master
+      - develop
   pull_request:
     branches:
       - master
+      - develop
 
 env:
   CTEST_OUTPUT_ON_FAILURE: 1
@@ -26,12 +29,12 @@ jobs:
 
       - name: build and install library
         run: |
-          cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release
+          cmake -S . -B build -DCMAKE_BUILD_TYPE=Release
           sudo cmake --build build --target install
           rm -rf build
 
       - name: configure
-        run: cmake -Stest -Bbuild -DTEST_INSTALLED_VERSION=1
+        run: cmake -S test -B build -DTEST_INSTALLED_VERSION=1
 
       - name: build
         run: cmake --build build --config Debug -j4
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index a2a098f..bbe6b24 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -1,12 +1,15 @@
+---
 name: MacOS
 
 on:
   push:
     branches:
       - master
+      - develop
   pull_request:
     branches:
       - master
+      - develop
 
 env:
   CTEST_OUTPUT_ON_FAILURE: 1
@@ -25,7 +28,7 @@ jobs:
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
 
       - name: configure
-        run: cmake -Stest -Bbuild -DCMAKE_BUILD_TYPE=Debug
+        run: cmake -S test -B build -DCMAKE_BUILD_TYPE=Debug
 
       - name: build
         run: cmake --build build -j4
diff --git a/.github/workflows/standalone.yml b/.github/workflows/standalone.yml
index 5c3853e..ca2d2f1 100644
--- a/.github/workflows/standalone.yml
+++ b/.github/workflows/standalone.yml
@@ -1,12 +1,13 @@
+---
 name: Standalone
 
 on:
   push:
     branches:
-      - master
+      - develop
   pull_request:
     branches:
-      - master
+      - develop
 
 env:
   CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
@@ -24,10 +25,12 @@ jobs:
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
 
       - name: configure
-        run: cmake -Sstandalone -Bbuild -DCMAKE_BUILD_TYPE=Debug -DCMAKE_BUILD_TYPE=Debug
+        run: cmake -S standalone -B build -DCMAKE_BUILD_TYPE=Debug -DCMAKE_BUILD_TYPE=Debug
 
       - name: build
         run: cmake --build build -j4
 
-      - name: run
-        run: ./build/Greeter
+      - name: test
+        run: |
+          cd build
+          ctest --build-config Debug --verbose
diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index ba20a70..9fabf78 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -1,12 +1,15 @@
+---
 name: Style
 
 on:
   push:
     branches:
       - master
+      - develop
   pull_request:
     branches:
       - master
+      - develop
 
 env:
   CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
@@ -29,7 +32,7 @@ jobs:
           pip3 install cmake_format==0.6.11 pyyaml
 
       - name: configure
-        run: cmake -Stest -Bbuild
+        run: cmake -S test -B build
 
       - name: check style
         run: cmake --build build --target check-format
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index a36711d..ad04e6a 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -1,12 +1,15 @@
+---
 name: Ubuntu
 
 on:
   push:
     branches:
       - master
+      - develop
   pull_request:
     branches:
       - master
+      - develop
 
 env:
   CTEST_OUTPUT_ON_FAILURE: 1
@@ -26,7 +29,7 @@ jobs:
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
 
       - name: configure
-        run: cmake -Stest -Bbuild -DENABLE_TEST_COVERAGE=1 -DCMAKE_BUILD_TYPE=Debug
+        run: cmake -S test -B build -DENABLE_TEST_COVERAGE=1 -DCMAKE_BUILD_TYPE=Debug
 
       - name: build
         run: cmake --build build -j4
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index a52b0ae..d8d09e3 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -1,12 +1,15 @@
+---
 name: Windows
 
 on:
   push:
     branches:
       - master
+      - develop
   pull_request:
     branches:
       - master
+      - develop
 
 env:
   CTEST_OUTPUT_ON_FAILURE: 1
@@ -25,7 +28,7 @@ jobs:
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
 
       - name: configure
-        run: cmake -Stest -Bbuild
+        run: cmake -S test -B build   # XXX -G "Visual Studio 16 2019" -T ClangCL
 
       - name: build
         run: cmake --build build --config Debug -j4
@@ -33,4 +36,4 @@ jobs:
       - name: test
         run: |
           cd build
-          ctest --build-config Debug
+          ctest --build-config Debug --verbose
diff --git a/.gitignore b/.gitignore
index d54a4f4..b8bd7ae 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,6 @@
+stagedir/
+build/
 /build*
 /.vscode
 /cpm_modules
-.DS_Store
\ No newline at end of file
+.DS_Store
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cde9bf8..959bb14 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ cmake_minimum_required(VERSION 3.14...3.19)
 # Note: update this to your new project's name and version
 project(
   Greeter
-  VERSION 1.0
+  VERSION 1.0.1
   LANGUAGES CXX
 )
 
@@ -20,28 +20,21 @@ endif()
 
 # ---- Project settings ----
 
-if(NOT DEFINED CMAKE_CXX_STANDARD)
-  set(CMAKE_CXX_STANDARD 20)
-  set(CMAKE_CXX_STANDARD_REQUIRED ON)
-  set(CMAKE_CXX_EXTENSIONS NO)
-endif()
+include(cmake/options.cmake)
 
 # ---- Add dependencies via CPM ----
 # see https://github.com/cpm-cmake/CPM.cmake for more info
 
 include(cmake/CPM.cmake)
-cpmusepackagelock(package-lock.cmake)
+CPMUsePackageLock(package-lock.cmake)
 
 # PackageProject.cmake will be used to make our target installable
 CPMAddPackage(
   NAME PackageProject.cmake
   GITHUB_REPOSITORY TheLartians/PackageProject.cmake
-  VERSION 1.4.1
+  VERSION 1.5.0
 )
 
-# Note: If fmt is not imported, this is needed to prevent: CMake Error: install(EXPORT
-# "GreeterTargets" ...) includes target "Greeter" which requires target "fmt" that is not in any
-# export set.  see too https://gitlab.kitware.com/cmake/cmake/-/issues/15415
 CPMAddPackage(
   NAME fmt
   GIT_TAG 7.1.3
@@ -53,31 +46,30 @@ CPMAddPackage(
 
 # Note: globbing sources is considered bad practice as CMake's generators may not detect new files
 # automatically. Keep that in mind when changing files, or explicitly mention them here.
-file(GLOB_RECURSE headers CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/include/*.h")
-file(GLOB_RECURSE sources CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/source/*.cpp")
+file(GLOB_RECURSE headers CONFIGURE_DEPENDS include/*.h)
+file(GLOB_RECURSE sources CONFIGURE_DEPENDS source/*.cpp)
 
 # ---- Create library ----
 
 # Note: for header-only libraries change all PUBLIC flags to INTERFACE and create an interface
 # target! EITHER: add_library(Greeter INTERFACE) OR:
-add_library(Greeter SHARED ${headers} ${sources})
-
-# EITHER:
+add_library(Greeter ${headers} ${sources})
 set_target_properties(Greeter PROPERTIES CXX_STANDARD ${CMAKE_CXX_STANDARD})
-# OR target_compile_features(Greeter PUBLIC cxx_std_17)
 
-# being a cross-platform target, we enforce standards conformance on MSVC
-if(MSVC)
-  target_compile_options(Greeter PUBLIC /permissive)
-endif()
+# for SameMajorVersion upgrade stategie
+set_target_properties(Greeter PROPERTIES SOVERSION 1 VERSION ${PROJECT_VERSION})
+
+# being a cross-platform target, we enforce standards conformance on MSVC:
+target_compile_options(Greeter PUBLIC "$<$<COMPILE_LANG_AND_ID:CXX,MSVC>:/permissive>")
 
 # Link dependencies EITHER:
 target_link_libraries(Greeter PRIVATE $<BUILD_INTERFACE:fmt::fmt-header-only>)
 # OR: target_link_libraries(Greeter PUBLIC fmt::fmt)
 
+set(INCLUDE_INSTALL_DIR include/${PROJECT_NAME}-${PROJECT_VERSION})
 target_include_directories(
-  Greeter PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-                 $<INSTALL_INTERFACE:include/${PROJECT_NAME}-${PROJECT_VERSION}>
+  Greeter BEFORE PUBLIC $<BUILD_INTERFACE: ${PROJECT_SOURCE_DIR}/include>
+                        $<INSTALL_INTERFACE:${INCLUDE_INSTALL_DIR}>
 )
 
 # ---- Create an installable target ----
@@ -86,6 +78,14 @@ target_include_directories(
 # the location where the project's version header will be placed should match the project's regular
 # header paths
 string(TOLOWER ${PROJECT_NAME}/version.h VERSION_HEADER_LOCATION)
+string(TOLOWER ${PROJECT_NAME}/greeter_export.h EXPORT_HEADER_LOCATION)
+
+# TODO: should be done in packageProject()
+include(GenerateExportHeader)
+generate_export_header(
+  ${PROJECT_NAME} EXPORT_FILE_NAME PackageProjectInclude/${EXPORT_HEADER_LOCATION}
+)
+# Note: the export header will be installed while installing the version header! CK
 
 packageProject(
   NAME ${PROJECT_NAME}
@@ -93,8 +93,8 @@ packageProject(
   NAMESPACE ${PROJECT_NAME}
   BINARY_DIR ${PROJECT_BINARY_DIR}
   INCLUDE_DIR ${PROJECT_SOURCE_DIR}/include
-  INCLUDE_DESTINATION include/${PROJECT_NAME}-${PROJECT_VERSION}
+  INCLUDE_DESTINATION ${INCLUDE_INSTALL_DIR}
   VERSION_HEADER "${VERSION_HEADER_LOCATION}"
   COMPATIBILITY SameMajorVersion
-  # NOTE: not needed DEPENDENCIES "fmt 7.1.3"
+  # Note: not needed DEPENDENCIES "fmt 7.1.3"
 )
diff --git a/GNUmakefile b/GNUmakefile
index a177583..edf5402 100755
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -1,58 +1,69 @@
 #
-# CURDIR=$(/bin/pwd)
-#
-# GENERATOR="Unix Makefiles"
-GENERATOR=Ninja
+# Note: make var CURDIR:=$(/bin/pwd)
+ROOT?=$(CURDIR)/stagedir
 
+#XXX GENERATOR?="Unix Makefiles"
+GENERATOR?=Ninja
+
+#XXX export CXX=clang++
+export CPM_USE_LOCAL_PACKAGES=0
 export CPM_SOURCE_CACHE=${HOME}/.cache/CPM
-export CPM_USE_LOCAL_PACKAGES=1
 
-.PHONY: update format all test check clean distclean lock
+.PHONY: update format all test standalone doc check clean distclean lock
 
-# the default target does just all
-check: all
+# the default target does just all, but neither standalone nor doc
+all:
 
-all: test
+clean:
+	find . -type d -name build | xargs rm -rf
 
-test: install
-
-
-distclean:
-	rm -rf build root
+distclean: clean
+	rm -rf build ${ROOT}
 
 # update CPM.cmake
 update:
 	wget -q -O cmake/CPM.cmake https://github.com/cpm-cmake/CPM.cmake/releases/latest/download/get_cpm.cmake
 
-lock: install
+lock: all standalone doc
+	cmake --build build/all --target cpm-update-package-lock
+	cmake --build build/test --target cpm-update-package-lock
 	cmake --build build/install --target cpm-update-package-lock
+	cmake --build build/standalone --target cpm-update-package-lock
+	cmake --build build/documentation --target cpm-update-package-lock
 
-# install the library
+# install the library to stagedir
 install:
-	cmake -S . -B build/install -G "${GENERATOR}" -DCMAKE_PREFIX_PATH=${CURDIR}/root -DCMAKE_INSTALL_PREFIX=${CURDIR}/root -DCMAKE_CXX_STANDARD=20 # --trace-expand
-	cmake --build build/install --target install
+	cmake -S . -B build/$@ -G "${GENERATOR}" -DCMAKE_PREFIX_PATH=${ROOT} -DCMAKE_INSTALL_PREFIX=${ROOT} # --trace-expand
+	cmake --build build/$@ --target $@
 
 # test the library
-test:
-	cmake -S test -B build/test -G "${GENERATOR}" -DCMAKE_PREFIX_PATH=${CURDIR}/root -DTEST_INSTALLED_VERSION=1
-	cmake --build build/test
-	cmake --build build/test --target test
+test: install
+	cmake -S $@ -B build/$@ -G "${GENERATOR}" -DCMAKE_PREFIX_PATH=${ROOT} -DTEST_INSTALLED_VERSION=1
+	cmake --build build/$@
+	cmake --build build/$@ --target $@
 
 # all together
-all:
-	cmake -S all -B build/all -G "${GENERATOR}" -DCMAKE_PREFIX_PATH=${CURDIR}/root -DTEST_INSTALLED_VERSION=1 -DENABLE_TEST_COVERAGE=1
-	cmake --build build/all
-	cmake --build build/all --target test
-	cmake --build build/all --target GenerateDocs
-	cmake --build build/all --target check-format
+all: test
+	cmake -S $@ -B build/$@ -G "${GENERATOR}" -DCMAKE_PREFIX_PATH=${ROOT} -DTEST_INSTALLED_VERSION=1 -DENABLE_TEST_COVERAGE=1
+	cmake --build build/$@
+	cmake --build build/$@ --target test
+	cmake --build build/$@ --target check-format
+
+# GenerateDocs
+doc:
+	cmake -S documentation -B build/documentation -G "${GENERATOR}"
+	cmake --build build/documentation --target GenerateDocs
 
 format: distclean
 	find . -name CMakeLists.txt | xargs cmake-format -i
+	find . -name '*.cmake' | xargs cmake-format -i
 	find . -name '*.cpp' | xargs clang-format -i
 	find . -name '*.h' | xargs clang-format -i
 
+standalone:
+	cmake -S $@ -B build/$@ -G "${GENERATOR}" -DCMAKE_PREFIX_PATH=${ROOT} -DCMAKE_EXPORT_COMPILE_COMMANDS=1
+	cmake --build build/$@
+
 # check the library
-check:
-	cmake -S standalone -B build/standalone -G "${GENERATOR}" -DCMAKE_PREFIX_PATH=${CURDIR}/root -DCMAKE_EXPORT_COMPILE_COMMANDS=1
-	cmake --build build/standalone --target all
+check: standalone
 	run-clang-tidy.py -p build/standalone -checks='-*,modernize-*,misc-*,hicpp-*,cert-*,readability-*,portability-*,performance-*,google-*' standalone
diff --git a/all/CMakeLists.txt b/all/CMakeLists.txt
index db5f5fb..0737fd5 100644
--- a/all/CMakeLists.txt
+++ b/all/CMakeLists.txt
@@ -1,7 +1,7 @@
 # this script adds all subprojects to a single build to allow IDEs understand the full project
 # structure.
 
-cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.14...3.19)
 
 project(BuildAll LANGUAGES CXX)
 
@@ -10,6 +10,6 @@ include(../cmake/tools.cmake)
 # needed to generate test target
 enable_testing()
 
-add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/../standalone ${CMAKE_BINARY_DIR}/standalone)
-add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/../test ${CMAKE_BINARY_DIR}/test)
-add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/../documentation ${CMAKE_BINARY_DIR}/documentation)
+add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/../standalone standalone)
+add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/../test test)
+add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/../documentation documentation)
diff --git a/cmake/options.cmake b/cmake/options.cmake
new file mode 100644
index 0000000..8650052
--- /dev/null
+++ b/cmake/options.cmake
@@ -0,0 +1,50 @@
+# only activate options for top level project
+if(NOT PROJECT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+  return()
+endif()
+
+option(BUILD_SHARED_LIBS "Create shared libraries" YES)
+
+# Set default visibility to hidden for all targets
+set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+set(CMAKE_VISIBILITY_INLINES_HIDDEN YES)
+
+# build the dynamic libraries and executables together at bin directory
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
+
+if(NOT DEFINED CMAKE_CXX_STANDARD)
+  option(CXX_STANDARD_REQUIRED "Require c++ standard" YES)
+  set(CMAKE_CXX_STANDARD 17)
+  set(CMAKE_CXX_EXTENSIONS NO)
+endif()
+
+# this reduce build time if using Nina generators
+option(CMAKE_DEPENDS_IN_PROJECT_ONLY "do NOT use system header files for dependency checking" YES)
+if(NOT MSVC)
+  if(CMAKE_DEPENDS_IN_PROJECT_ONLY)
+    set(CMAKE_DEPFILE_FLAGS_C
+        "-MMD"
+        CACHE STRING "dependency flag" FORCE
+    )
+    set(CMAKE_DEPFILE_FLAGS_CXX
+        "-MMD"
+        CACHE STRING "dependency flag" FORCE
+    )
+  else()
+    set(CMAKE_DEPFILE_FLAGS_C
+        "-MD"
+        CACHE STRING "dependency flag" FORCE
+    )
+    set(CMAKE_DEPFILE_FLAGS_CXX
+        "-MD"
+        CACHE STRING "dependency flag" FORCE
+    )
+  endif()
+endif()
+
+option(CMAKE_EXPORT_COMPILE_COMMANDS "support clang-tidy, cppcheck, ..." YES)
+if(CMAKE_EXPORT_COMPILE_COMMANDS)
+  set(CMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES ${CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES})
+endif()
diff --git a/cmake/tools.cmake b/cmake/tools.cmake
index 4029e37..a5d1f1f 100644
--- a/cmake/tools.cmake
+++ b/cmake/tools.cmake
@@ -7,6 +7,15 @@ if(NOT PROJECT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
 endif()
 
 include(${CMAKE_CURRENT_LIST_DIR}/CPM.cmake)
+CPMUsePackageLock(package-lock.cmake)
+
+include(${CMAKE_CURRENT_LIST_DIR}/options.cmake)
+
+# option: default not set
+set(USE_STATIC_ANALYZER
+    ""
+    CACHE STRING "clang-tidy;cppcheck;iwyu"
+)
 
 # enables sanitizers support using the the `USE_SANITIZER` flag available values are: Address,
 # Memory, MemoryWithOrigins, Undefined, Thread, Leak, 'Address;Undefined'
@@ -65,6 +74,7 @@ if(USE_SANITIZER OR USE_STATIC_ANALYZER)
 endif()
 
 # enables CCACHE support through the USE_CCACHE flag possible values are: YES, NO or equivalent
+option(USE_CCACHE "use ccache" YES)
 if(USE_CCACHE)
   CPMAddPackage(
     NAME Ccache.cmake
diff --git a/documentation/CMakeLists.txt b/documentation/CMakeLists.txt
index b3717dc..18c999e 100644
--- a/documentation/CMakeLists.txt
+++ b/documentation/CMakeLists.txt
@@ -5,6 +5,7 @@ project(GreeterDocs)
 # ---- Dependencies ----
 
 include(../cmake/CPM.cmake)
+CPMUsePackageLock(package-lock.cmake)
 
 CPMAddPackage(NAME Greeter SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/..)
 
@@ -21,16 +22,16 @@ CPMAddPackage(
 set(DOXYGEN_PROJECT_NAME Greeter)
 set(DOXYGEN_PROJECT_VERSION ${Greeter_VERSION})
 set(DOXYGEN_PROJECT_ROOT "${CMAKE_CURRENT_LIST_DIR}/..")
-set(DOXYGEN_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/doxygen")
+set(DOXYGEN_OUTPUT_DIRECTORY doxygen)
 
-configure_file(${CMAKE_CURRENT_LIST_DIR}/Doxyfile ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
+configure_file(${CMAKE_CURRENT_LIST_DIR}/Doxyfile Doxyfile)
 
-configure_file(${CMAKE_CURRENT_LIST_DIR}/conf.py ${CMAKE_CURRENT_BINARY_DIR}/conf.py)
+configure_file(${CMAKE_CURRENT_LIST_DIR}/conf.py conf.py)
 
 add_custom_target(
   GenerateDocs
   ${CMAKE_COMMAND} -E make_directory "${DOXYGEN_OUTPUT_DIRECTORY}"
-  COMMAND "${MCSS_SOURCE_DIR}/documentation/doxygen.py" "${CMAKE_CURRENT_BINARY_DIR}/conf.py"
+  COMMAND "${MCSS_SOURCE_DIR}/documentation/doxygen.py" conf.py
   COMMAND echo "Docs written to: ${DOXYGEN_OUTPUT_DIRECTORY}"
   WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
 )
diff --git a/include/greeter/greeter.h b/include/greeter/greeter.h
index 19569eb..1266283 100644
--- a/include/greeter/greeter.h
+++ b/include/greeter/greeter.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <greeter/greeter_export.h>
+
 #include <string>
 
 namespace greeter {
@@ -18,14 +20,15 @@ namespace greeter {
      * @brief Creates a new greeter
      * @param name the name to greet
      */
-    explicit Greeter(std::string name);
+    explicit GREETER_EXPORT Greeter(std::string _name);
 
     /**
      * @brief Creates a localized string containing the greeting
      * @param lang the language to greet in
      * @return a string containing the greeting
      */
-    [[nodiscard]] std::string greet(LanguageCode lang = LanguageCode::EN) const;
+    [[nodiscard]] auto GREETER_EXPORT greet(LanguageCode lang = LanguageCode::EN) const
+        -> std::string;
   };
 
 }  // namespace greeter
diff --git a/standalone/CMakeLists.txt b/standalone/CMakeLists.txt
index bcf0be6..f80a0d7 100644
--- a/standalone/CMakeLists.txt
+++ b/standalone/CMakeLists.txt
@@ -9,6 +9,7 @@ include(../cmake/tools.cmake)
 # ---- Dependencies ----
 
 include(../cmake/CPM.cmake)
+CPMUsePackageLock(package-lock.cmake)
 
 CPMAddPackage(
   NAME cxxopts
@@ -21,14 +22,17 @@ CPMAddPackage(NAME Greeter SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/..)
 
 # ---- Create standalone executable ----
 
-file(GLOB sources CONFIGURE_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/source/*.cpp)
+file(GLOB sources CONFIGURE_DEPENDS source/*.cpp)
 
 add_executable(GreeterStandalone ${sources})
+set_target_properties(GreeterStandalone PROPERTIES CXX_STANDARD ${CMAKE_CXX_STANDARD})
 
-set_target_properties(GreeterStandalone PROPERTIES CXX_STANDARD 17 OUTPUT_NAME "Greeter")
-
-# WORKAROUND for ALIAS target is missing error! CK
+# WORKAROUND missing ALIAS target error! CK
 if(NOT TARGET cxxopts::cxxopts)
   add_library(cxxopts::cxxopts ALIAS cxxopts)
 endif()
 target_link_libraries(GreeterStandalone Greeter::Greeter cxxopts::cxxopts)
+
+# ---- run the standalone executable ----
+enable_testing()
+add_test(NAME GreeterStandalone COMMAND GreeterStandalone)
diff --git a/standalone/source/main.cpp b/standalone/source/main.cpp
index 6874460..55588bb 100644
--- a/standalone/source/main.cpp
+++ b/standalone/source/main.cpp
@@ -8,8 +8,6 @@
 
 // NOLINTNEXTLINE(modernize-use-trailing-return-type)
 int main(int argc, char** argv) {
-  // prevent warning: initialization of 'languages' with static storage duration may throw an
-  // exception that cannot be caught [cert-err58-cpp]
   const std::unordered_map<std::string, greeter::LanguageCode> languages{
       {"en", greeter::LanguageCode::EN},
       {"de", greeter::LanguageCode::DE},
@@ -17,8 +15,6 @@ int main(int argc, char** argv) {
       {"fr", greeter::LanguageCode::FR},
   };
 
-  // prevent warning: do not use pointer arithmetic
-  // [cppcoreguidelines-pro-bounds-pointer-arithmetic]
   cxxopts::Options options(*argv, "A program to welcome the world!");
 
   std::string language;
@@ -40,7 +36,6 @@ int main(int argc, char** argv) {
     return 0;
   }
 
-  // prevent warning: do not use 'else' after 'return' [readability-else-after-return]
   if (result["version"].as<bool>()) {
     std::cout << "Greeter, version " << GREETER_VERSION << std::endl;
     return 0;
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 5fa8612..b86c7e0 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,6 +1,10 @@
 cmake_minimum_required(VERSION 3.14...3.19)
 
-project(GreeterTests LANGUAGES CXX)
+project(
+  GreeterTests
+  VERSION 1
+  LANGUAGES CXX
+)
 
 # ---- Options ----
 
@@ -14,6 +18,7 @@ include(../cmake/tools.cmake)
 # ---- Dependencies ----
 
 include(../cmake/CPM.cmake)
+CPMUsePackageLock(package-lock.cmake)
 
 CPMAddPackage(
   NAME doctest
@@ -37,16 +42,15 @@ CPMAddPackage(
 
 # ---- Create binary ----
 
-file(GLOB sources CONFIGURE_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/source/*.cpp)
+file(GLOB sources CONFIGURE_DEPENDS source/*.cpp)
 add_executable(GreeterTests ${sources})
 target_link_libraries(GreeterTests doctest::doctest Greeter::Greeter)
-
-set_target_properties(GreeterTests PROPERTIES CXX_STANDARD 17)
+set_target_properties(GreeterTests PROPERTIES CXX_STANDARD ${CMAKE_CXX_STANDARD})
 
 # enable compiler warnings
 if(NOT TEST_INSTALLED_VERSION)
-  if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
-    target_compile_options(Greeter PUBLIC -Wall -Wpedantic -Wextra -Werror)
+  if(CMAKE_CXX_COMPILER_ID MATCHES "(Apple)?[Cc]lang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+    target_compile_options(Greeter PUBLIC -Wall -Wextra -Werror)
   elseif(MSVC)
     target_compile_options(Greeter PUBLIC /W4 /WX)
     target_compile_definitions(GreeterTests PUBLIC DOCTEST_CONFIG_USE_STD_HEADERS)
@@ -57,7 +61,7 @@ endif()
 
 enable_testing()
 
-add_test(greeterTests GreeterTests)
+add_test(NAME greeterTests COMMAND GreeterTests -s false)
 
 # ---- code coverage ----
 
diff --git a/test/source/greeter.cpp b/test/source/greeter.cpp
index 10a1242..ff3204b 100644
--- a/test/source/greeter.cpp
+++ b/test/source/greeter.cpp
@@ -2,8 +2,6 @@
 #include <greeter/greeter.h>
 #include <greeter/version.h>
 
-#include <string>
-
 TEST_CASE("Greeter") {
   using namespace greeter;
 
@@ -17,10 +15,10 @@ TEST_CASE("Greeter") {
 
 TEST_CASE("Greeter version") {
 #if (__cpp_lib_starts_ends_with)
-  static_assert(std::string_view(GREETER_VERSION).starts_with("1.0"));  // TBD C++20 only
-  CHECK(std::string(GREETER_VERSION).starts_with("1.0"));               // SameMajorVersion
+  static_assert(std::string_view(GREETER_VERSION).starts_with("1"));  // TBD C++20 only
+  CHECK(std::string(GREETER_VERSION).starts_with("1"));               // SameMajorVersion
 #else
-  static_assert(std::string_view(GREETER_VERSION) == std::string_view("1.0"));
-  CHECK(std::string(GREETER_VERSION) == std::string("1.0"));
+  static_assert(std::string_view(GREETER_VERSION) == std::string_view("1.0.1"));
+  CHECK(std::string(GREETER_VERSION) == std::string("1.0.1"));
 #endif
 }