Modernize cmake project files

Fix install target

Update cmake-format config file

Format all cmake files.

Update CPM.cmake version.

Use FILE_SET HEADER to verify and install the header files.

Prevent build problems caused by CPM_USE_LOCAL_PACKAGES

Prevent problems with doctest if local found

.cmake-format

@@ -51,7 +51,13 @@ parse:
         NAMESPACE: 1
         INCLUDE_DIR: 1
         INCLUDE_DESTINATION: 1
+        INCLUDE_HEADER_PATTERN: 1
         BINARY_DIR: 1
         COMPATIBILITY: 1
         VERSION_HEADER: 1
+        EXPORT_HEADER: 1
+        DISABLE_VERSION_SUFFIX: 1
+        CPACK: 1
+        RUNTIME_DESTINATION: 1
         DEPENDENCIES: +
+        HEADER_SETS: +

.github/workflows/install.yml

@@ -29,6 +29,7 @@ jobs:
       - name: build and install library
         run: |
           cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release
+          cmake --build build --target all_verify_interface_header_sets
           sudo cmake --build build --target install
           rm -rf build
 

.gitignore

@@ -1,4 +1,5 @@
+build/
 /build*
 /.vscode
 /cpm_modules
-.DS_Store
+.DS_Store

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14...3.22)
+cmake_minimum_required(VERSION 3.24...3.31)
 
 # ---- Project ----
 
@@ -24,15 +24,20 @@ endif()
 include(cmake/CPM.cmake)
 
 # PackageProject.cmake will be used to make our target installable
-CPMAddPackage("gh:TheLartians/PackageProject.cmake@1.8.0")
+include(cmake/PackageProject.cmake)
+# XXX # CPMAddPackage("gh:TheLartians/PackageProject.cmake@1.13.0")
+
+# XXX set(CMAKE_SKIP_INSTALL_RULES YES)
 
 CPMAddPackage(
   NAME fmt
-  GIT_TAG 10.2.1
+  GIT_TAG 11.1.4
   GITHUB_REPOSITORY fmtlib/fmt
   OPTIONS "FMT_INSTALL YES" # create an installable target
 )
 
+set(CMAKE_VERIFY_INTERFACE_HEADER_SETS ${PROJECT_IS_TOP_LEVEL})
+
 # ---- Add source files ----
 
 # Note: globbing sources is considered bad practice as CMake's generators may not detect new files
@@ -42,9 +47,27 @@ file(GLOB_RECURSE sources CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/source/
 
 # ---- Create library ----
 
+# the location where the project's version header will be placed should match the project's regular
+# header paths
+string(TOLOWER ${PROJECT_NAME}/version.h VERSION_HEADER_LOCATION)
+
 # Note: for header-only libraries change all PUBLIC flags to INTERFACE and create an interface
 # target: add_library(${PROJECT_NAME} INTERFACE)
-add_library(${PROJECT_NAME} ${headers} ${sources})
+add_library(${PROJECT_NAME})
+target_sources(
+  ${PROJECT_NAME}
+  PRIVATE ${sources}
+  PUBLIC FILE_SET
+         public_headers
+         TYPE
+         HEADERS
+         BASE_DIRS
+         ${CMAKE_CURRENT_SOURCE_DIR}/include
+         ${CMAKE_CURRENT_BINARY_DIR}
+         FILES
+         ${headers}
+         ${CMAKE_CURRENT_BINARY_DIR}/${VERSION_HEADER_LOCATION}
+)
 set_target_properties(${PROJECT_NAME} PROPERTIES CXX_STANDARD 17)
 
 # being a cross-platform target, we enforce standards conformance on MSVC
@@ -53,26 +76,28 @@ target_compile_options(${PROJECT_NAME} PUBLIC "$<$<COMPILE_LANG_AND_ID:CXX,MSVC>
 # Link dependencies
 target_link_libraries(${PROJECT_NAME} PRIVATE fmt::fmt)
 
-target_include_directories(
+set(GREETER_VERSION \"${PROJECT_VERSION}\")
-  ${PROJECT_NAME} PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
+string(TOUPPER ${PROJECT_NAME} UPPERCASE_PROJECT_NAME)
-                         $<INSTALL_INTERFACE:include/${PROJECT_NAME}-${PROJECT_VERSION}>
+configure_file(${PACKAGE_PROJECT_ROOT_PATH}/version.h.in ${VERSION_HEADER_LOCATION} @ONLY)
-)
+
+if(CMAKE_SKIP_INSTALL_RULES)
+  add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
+  return()
+endif()
 
 # ---- Create an installable target ----
 # this allows users to install and find the library via `find_package()`.
 
-# the location where the project's version header will be placed should match the project's regular
+include(cmake/AddUninstallTarget.cmake)
-# header paths
-string(TOLOWER ${PROJECT_NAME}/version.h VERSION_HEADER_LOCATION)
 
 packageProject(
   NAME ${PROJECT_NAME}
   VERSION ${PROJECT_VERSION}
   NAMESPACE ${PROJECT_NAME}
   BINARY_DIR ${PROJECT_BINARY_DIR}
-  INCLUDE_DIR ${PROJECT_SOURCE_DIR}/include
+  # Not used! INCLUDE_DIR ${PROJECT_SOURCE_DIR}/include
-  INCLUDE_DESTINATION include/${PROJECT_NAME}-${PROJECT_VERSION}
-  VERSION_HEADER "${VERSION_HEADER_LOCATION}"
   COMPATIBILITY SameMajorVersion
-  DEPENDENCIES "fmt 10.2.1"
+  RUNTIME_DESTINATION /
+  DEPENDENCIES "fmt 11.1.4"
+  HEADER_SETS public_headers
 )

README.md

@@ -44,7 +44,7 @@ This template is the result of learnings from many previous projects and should
 Eventually, you can remove any unused files, such as the standalone directory or irrelevant github workflows for your project.
 Feel free to replace the License with one suited for your project.
 
-To cleanly separate the library and subproject code, the outer `CMakeList.txt` only defines the library itself while the tests and other subprojects are self-contained in their own directories. 
+To cleanly separate the library and subproject code, the outer `CMakeList.txt` only defines the library itself while the tests and other subprojects are self-contained in their own directories.
 During development it is usually convenient to [build all subprojects at once](#build-everything-at-once).
 
 ### Build and run the standalone target
@@ -66,7 +66,7 @@ cmake -S test -B build/test
 cmake --build build/test
 CTEST_OUTPUT_ON_FAILURE=1 cmake --build build/test --target test
 
-# or simply call the executable: 
+# or simply call the executable:
 ./build/test/GreeterTests
 ```
 
@@ -91,7 +91,7 @@ See [Format.cmake](https://github.com/TheLartians/Format.cmake) for details.
 These dependencies can be easily installed using pip.
 
 ```bash
-pip install clang-format==14.0.6 cmake_format==0.6.11 pyyaml
+pip install cmake clang-format cmake_format==0.6.11 pyyaml
 ```
 
 ### Build the documentation

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...3.22)
+cmake_minimum_required(VERSION 3.24...3.31)
 
 project(BuildAll LANGUAGES CXX)
 

cmake/AddUninstallTarget.cmake

@@ -0,0 +1,101 @@
+# SPDX-FileCopyrightText: 2012-2021 Istituto Italiano di Tecnologia (IIT) SPDX-FileCopyrightText:
+# 2008-2013 Kitware Inc. SPDX-License-Identifier: BSD-3-Clause
+
+#[=======================================================================[.rst:
+AddUninstallTarget
+------------------
+
+Add the "uninstall" target for your project::
+
+  include(AddUninstallTarget)
+
+
+will create a file ``cmake_uninstall.cmake`` in the build directory and add a
+custom target ``uninstall`` (or ``UNINSTALL`` on Visual Studio and Xcode) that
+will remove the files installed by your package (using
+``install_manifest.txt``).
+See also
+https://gitlab.kitware.com/cmake/community/wikis/FAQ#can-i-do-make-uninstall-with-cmake
+
+The :module:`AddUninstallTarget` module must be included in your main
+``CMakeLists.txt``. If included in a subdirectory it does nothing.
+This allows you to use it safely in your main ``CMakeLists.txt`` and include
+your project using ``add_subdirectory`` (for example when using it with
+:cmake:module:`FetchContent`).
+
+If the ``uninstall`` target already exists, the module does nothing.
+#]=======================================================================]
+
+# AddUninstallTarget works only when included in the main CMakeLists.txt
+if(NOT "${CMAKE_CURRENT_BINARY_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
+  return()
+endif()
+
+# The name of the target is uppercase in MSVC and Xcode (for coherence with the other standard
+# targets)
+if("${CMAKE_GENERATOR}" MATCHES "^(Visual Studio|Xcode)")
+  set(_uninstall "UNINSTALL")
+else()
+  set(_uninstall "uninstall")
+endif()
+
+# If target is already defined don't do anything
+if(TARGET ${_uninstall})
+  return()
+endif()
+
+set(_filename cmake_uninstall.cmake)
+
+file(
+  WRITE "${CMAKE_CURRENT_BINARY_DIR}/${_filename}"
+  "if(NOT EXISTS \"${CMAKE_CURRENT_BINARY_DIR}/install_manifest.txt\")
+  message(WARNING \"Cannot find install manifest: \\\"${CMAKE_CURRENT_BINARY_DIR}/install_manifest.txt\\\"\")
+  return()
+endif()
+
+file(READ \"${CMAKE_CURRENT_BINARY_DIR}/install_manifest.txt\" files)
+string(STRIP \"\${files}\" files)
+string(REGEX REPLACE \"\\n\" \";\" files \"\${files}\")
+list(REVERSE files)
+foreach(file \${files})
+  if(IS_SYMLINK \"\$ENV{DESTDIR}\${file}\" OR EXISTS \"\$ENV{DESTDIR}\${file}\")
+    message(STATUS \"Uninstalling: \$ENV{DESTDIR}\${file}\")
+    execute_process(
+      COMMAND \${CMAKE_COMMAND} -E remove \"\$ENV{DESTDIR}\${file}\"
+      OUTPUT_VARIABLE rm_out
+      RESULT_VARIABLE rm_retval)
+    if(NOT \"\${rm_retval}\" EQUAL 0)
+      message(FATAL_ERROR \"Problem when removing \\\"\$ENV{DESTDIR}\${file}\\\"\")
+    endif()
+  else()
+    message(STATUS \"Not-found: \$ENV{DESTDIR}\${file}\")
+  endif()
+endforeach(file)
+"
+)
+
+set(_desc "Uninstall the project...")
+if(CMAKE_GENERATOR STREQUAL "Unix Makefiles")
+  set(_comment
+      COMMAND
+      \$\(CMAKE_COMMAND\)
+      -E
+      cmake_echo_color
+      --switch=$\(COLOR\)
+      --cyan
+      "${_desc}"
+  )
+else()
+  set(_comment COMMENT "${_desc}")
+endif()
+add_custom_target(
+  ${_uninstall}
+  ${_comment}
+  COMMAND ${CMAKE_COMMAND} -P ${_filename}
+  USES_TERMINAL
+  BYPRODUCTS uninstall_byproduct
+  WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
+)
+set_property(SOURCE uninstall_byproduct PROPERTY SYMBOLIC 1)
+
+set_property(TARGET ${_uninstall} PROPERTY FOLDER "CMakePredefinedTargets")

cmake/CPM.cmake

@@ -2,8 +2,8 @@
 #
 # SPDX-FileCopyrightText: Copyright (c) 2019-2023 Lars Melchior and contributors
 
-set(CPM_DOWNLOAD_VERSION 0.40.2)
+set(CPM_DOWNLOAD_VERSION 0.40.7)
-set(CPM_HASH_SUM "c8cdc32c03816538ce22781ed72964dc864b2a34a310d3b7104812a5ca2d835d")
+set(CPM_HASH_SUM "c0fc82149e00c43a21febe7b2ca57b2ffea2b8e88ab867022c21d6b81937eb50")
 
 if(CPM_SOURCE_CACHE)
   set(CPM_DOWNLOAD_LOCATION "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")

cmake/Config.cmake.in

@@ -0,0 +1,10 @@
+include(CMakeFindDependencyMacro)
+
+string(REGEX MATCHALL "[^;]+" SEPARATE_DEPENDENCIES "@PROJECT_DEPENDENCIES@")
+
+foreach(dependency ${SEPARATE_DEPENDENCIES})
+  string(REPLACE " " ";" args "${dependency}")
+  find_dependency(${args})
+endforeach()
+
+include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake")

cmake/PackageProject.cmake

@@ -0,0 +1,244 @@
+cmake_minimum_required(VERSION 3.14...3.31)
+
+set(PACKAGE_PROJECT_ROOT_PATH
+    "${CMAKE_CURRENT_LIST_DIR}"
+    CACHE INTERNAL "The path to the PackageProject directory"
+)
+
+# if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.31.0") cmake_policy(SET CMP0177 NEW) endif()
+
+function(packageProject)
+  include(CMakePackageConfigHelpers)
+  include(GNUInstallDirs)
+
+  cmake_parse_arguments(
+    PROJECT
+    ""
+    "NAME;VERSION;INCLUDE_DIR;INCLUDE_DESTINATION;BINARY_DIR;COMPATIBILITY;EXPORT_HEADER;VERSION_HEADER;NAMESPACE;DISABLE_VERSION_SUFFIX;ARCH_INDEPENDENT;INCLUDE_HEADER_PATTERN;CPACK;RUNTIME_DESTINATION"
+    "DEPENDENCIES;HEADER_SETS"
+    ${ARGN}
+  )
+
+  # optional feature: TRUE or FALSE or UNDEFINED! These variables will then hold the respective
+  # value from the argument list or be undefined if the associated one_value_keyword could not be
+  # found.
+  if(PROJECT_DISABLE_VERSION_SUFFIX)
+    unset(PROJECT_VERSION_SUFFIX)
+  else()
+    set(PROJECT_VERSION_SUFFIX -${PROJECT_VERSION})
+  endif()
+
+  if(NOT DEFINED PROJECT_COMPATIBILITY)
+    set(PROJECT_COMPATIBILITY AnyNewerVersion)
+  endif()
+
+  # we want to automatically add :: to our namespace, so only append if a namespace was given in the
+  # first place we also provide an alias to ensure that local and installed versions have the same
+  # name
+  if(DEFINED PROJECT_NAMESPACE)
+    if(PROJECT_CPACK)
+      set(CPACK_PACKAGE_NAMESPACE ${PROJECT_NAMESPACE})
+    endif()
+    set(PROJECT_NAMESPACE ${PROJECT_NAMESPACE}::)
+    add_library(${PROJECT_NAMESPACE}${PROJECT_NAME} ALIAS ${PROJECT_NAME})
+  endif()
+
+  if(DEFINED PROJECT_VERSION_HEADER OR DEFINED PROJECT_EXPORT_HEADER)
+    set(PROJECT_VERSION_INCLUDE_DIR ${PROJECT_BINARY_DIR}/PackageProjectInclude)
+
+    if(DEFINED PROJECT_EXPORT_HEADER)
+      include(GenerateExportHeader)
+      generate_export_header(
+        ${PROJECT_NAME} EXPORT_FILE_NAME ${PROJECT_VERSION_INCLUDE_DIR}/${PROJECT_EXPORT_HEADER}
+      )
+    endif()
+
+    if(DEFINED PROJECT_VERSION_HEADER)
+      # clear previous matches
+      unset(CMAKE_MATCH_1)
+      unset(CMAKE_MATCH_3)
+      unset(CMAKE_MATCH_5)
+      unset(CMAKE_MATCH_7)
+
+      string(REGEX MATCH "^([0-9]+)(\\.([0-9]+))?(\\.([0-9]+))?(\\.([0-9]+))?$" _
+                   "${PROJECT_VERSION}"
+      )
+
+      set(PROJECT_VERSION_MAJOR ${CMAKE_MATCH_1})
+      set(PROJECT_VERSION_MINOR ${CMAKE_MATCH_3})
+      set(PROJECT_VERSION_PATCH ${CMAKE_MATCH_5})
+      set(PROJECT_VERSION_TWEAK ${CMAKE_MATCH_7})
+
+      if(NOT DEFINED PROJECT_VERSION_MAJOR)
+        set(PROJECT_VERSION_MAJOR "0")
+      endif()
+      if(NOT DEFINED PROJECT_VERSION_MINOR)
+        set(PROJECT_VERSION_MINOR "0")
+      endif()
+      if(NOT DEFINED PROJECT_VERSION_PATCH)
+        set(PROJECT_VERSION_PATCH "0")
+      endif()
+      if(NOT DEFINED PROJECT_VERSION_TWEAK)
+        set(PROJECT_VERSION_TWEAK "0")
+      endif()
+
+      string(TOUPPER ${PROJECT_NAME} UPPERCASE_PROJECT_NAME)
+      # ensure that the generated macro does not include invalid characters
+      string(REGEX REPLACE [^a-zA-Z0-9] _ UPPERCASE_PROJECT_NAME ${UPPERCASE_PROJECT_NAME})
+      configure_file(
+        ${PACKAGE_PROJECT_ROOT_PATH}/version.h.in
+        ${PROJECT_VERSION_INCLUDE_DIR}/${PROJECT_VERSION_HEADER} @ONLY
+      )
+    endif()
+
+    get_target_property(target_type ${PROJECT_NAME} TYPE)
+    if(target_type STREQUAL "INTERFACE_LIBRARY")
+      set(VISIBILITY INTERFACE)
+    else()
+      set(VISIBILITY PUBLIC)
+    endif()
+    target_include_directories(
+      ${PROJECT_NAME} ${VISIBILITY} "$<BUILD_INTERFACE:${PROJECT_VERSION_INCLUDE_DIR}>"
+    )
+    install(
+      DIRECTORY ${PROJECT_VERSION_INCLUDE_DIR}/
+      DESTINATION ${PROJECT_INCLUDE_DESTINATION}
+      COMPONENT "${PROJECT_NAME}_Development"
+    )
+  endif()
+
+  set(wbpvf_extra_args "")
+  if(NOT DEFINED PROJECT_ARCH_INDEPENDENT)
+    get_target_property(target_type "${PROJECT_NAME}" TYPE)
+    if(target_type STREQUAL "INTERFACE_LIBRARY")
+      set(PROJECT_ARCH_INDEPENDENT YES)
+    endif()
+  endif()
+
+  if(PROJECT_ARCH_INDEPENDENT)
+    set(wbpvf_extra_args ARCH_INDEPENDENT)
+    # install to architecture independent (share) directory
+    set(INSTALL_DIR_FOR_CMAKE_CONFIGS ${CMAKE_INSTALL_DATADIR})
+  else()
+    # if x32 or multilib->x32 , install to (lib) directory. if x64, install to (lib64) directory
+    set(INSTALL_DIR_FOR_CMAKE_CONFIGS ${CMAKE_INSTALL_LIBDIR})
+  endif()
+
+  write_basic_package_version_file(
+    "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+    VERSION ${PROJECT_VERSION}
+    COMPATIBILITY ${PROJECT_COMPATIBILITY} ${wbpvf_extra_args}
+  )
+
+  # set default runtime install subdirectory (RUNTIME_DESTINATION)
+  if(NOT DEFINED PROJECT_RUNTIME_DESTINATION)
+    set(PROJECT_RUNTIME_DESTINATION ${PROJECT_NAME}${PROJECT_VERSION_SUFFIX})
+  endif()
+
+  if(PROJECT_HEADER_SETS)
+    # required to install if use in project target since CMake 3.23
+    set(FILE_SET_ARGS "FILE_SET" "${PROJECT_HEADER_SETS}")
+  endif()
+
+  install(
+    TARGETS ${PROJECT_NAME}
+    EXPORT ${PROJECT_NAME}Targets
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}/${PROJECT_RUNTIME_DESTINATION}
+            COMPONENT "${PROJECT_NAME}_Runtime"
+            NAMELINK_COMPONENT "${PROJECT_NAME}_Development"
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}/${PROJECT_RUNTIME_DESTINATION}
+            COMPONENT "${PROJECT_NAME}_Development"
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}/${PROJECT_RUNTIME_DESTINATION}
+            COMPONENT "${PROJECT_NAME}_Runtime"
+    BUNDLE DESTINATION ${CMAKE_INSTALL_BINDIR}/${PROJECT_RUNTIME_DESTINATION}
+           COMPONENT "${PROJECT_NAME}_Runtime"
+    PUBLIC_HEADER
+      DESTINATION ${PROJECT_INCLUDE_DESTINATION}
+      COMPONENT "${PROJECT_NAME}_Development"
+      ${FILE_SET_ARGS}
+    INCLUDES
+    DESTINATION "${PROJECT_INCLUDE_DESTINATION}"
+  )
+
+  set("${PROJECT_NAME}_INSTALL_CMAKEDIR"
+      "${INSTALL_DIR_FOR_CMAKE_CONFIGS}/cmake/${PROJECT_NAME}${PROJECT_VERSION_SUFFIX}"
+      CACHE PATH "CMake package config location relative to the install prefix"
+  )
+
+  mark_as_advanced("${PROJECT_NAME}_INSTALL_CMAKEDIR")
+
+  configure_file(
+    ${PACKAGE_PROJECT_ROOT_PATH}/Config.cmake.in
+    "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake" @ONLY
+  )
+
+  install(
+    EXPORT ${PROJECT_NAME}Targets
+    DESTINATION "${${PROJECT_NAME}_INSTALL_CMAKEDIR}"
+    NAMESPACE ${PROJECT_NAMESPACE}
+    COMPONENT "${PROJECT_NAME}_Development"
+  )
+
+  install(
+    FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+          "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
+    DESTINATION "${${PROJECT_NAME}_INSTALL_CMAKEDIR}"
+    COMPONENT "${PROJECT_NAME}_Development"
+  )
+
+  if(NOT DEFINED PROJECT_INCLUDE_HEADER_PATTERN)
+    set(PROJECT_INCLUDE_HEADER_PATTERN "*")
+  endif()
+
+  if(PROJECT_INCLUDE_DESTINATION AND PROJECT_INCLUDE_DIR)
+    install(
+      DIRECTORY ${PROJECT_INCLUDE_DIR}/
+      DESTINATION ${PROJECT_INCLUDE_DESTINATION}
+      COMPONENT "${PROJECT_NAME}_Development"
+      FILES_MATCHING
+      PATTERN "${PROJECT_INCLUDE_HEADER_PATTERN}"
+    )
+  endif()
+
+  set(${PROJECT_NAME}_VERSION
+      ${PROJECT_VERSION}
+      CACHE INTERNAL ""
+  )
+
+  if(PROJECT_CPACK)
+    if(CPACK_PACKAGE_NAMESPACE)
+      set(CPACK_PACKAGE_NAME ${CPACK_PACKAGE_NAMESPACE}-${PROJECT_NAME})
+    else()
+      set(CPACK_PACKAGE_NAME ${PROJECT_NAME})
+    endif()
+    if(NOT CPACK_PACKAGE_DESCRIPTION_SUMMARY)
+      set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "${PROJECT_DESCRIPTION}")
+    endif()
+    if(NOT CPACK_PACKAGE_HOMEPAGE_URL)
+      set(CPACK_PACKAGE_HOMEPAGE_URL "${PROJECT_HOMEPAGE_URL}")
+    endif()
+    set(CPACK_VERBATIM_VARIABLES YES)
+    set(CPACK_THREADS 0)
+    set(CPACK_PACKAGE_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
+    set(CPACK_PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
+    set(CPACK_PACKAGE_VERSION_PATCH ${PROJECT_VERSION_PATCH})
+
+    if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/README.md")
+      set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_SOURCE_DIR}/README.md")
+    endif()
+
+    set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS ON)
+    set(CPACK_DEBIAN_FILE_NAME DEB-DEFAULT)
+    set(CPACK_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS
+        OWNER_READ
+        OWNER_WRITE
+        OWNER_EXECUTE
+        GROUP_READ
+        GROUP_EXECUTE
+        WORLD_READ
+        WORLD_EXECUTE
+    )
+
+    include(CPack)
+  endif()
+endfunction()

cmake/version.h.in

@@ -0,0 +1,8 @@
+#pragma once
+
+#define @UPPERCASE_PROJECT_NAME@_VERSION "@PROJECT_VERSION@"
+
+#define @UPPERCASE_PROJECT_NAME@_VERSION_MAJOR @PROJECT_VERSION_MAJOR@
+#define @UPPERCASE_PROJECT_NAME@_VERSION_MINOR @PROJECT_VERSION_MINOR@
+#define @UPPERCASE_PROJECT_NAME@_VERSION_PATCH @PROJECT_VERSION_PATCH@
+#define @UPPERCASE_PROJECT_NAME@_VERSION_TWEAK @PROJECT_VERSION_TWEAK@

documentation/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14...3.22)
+cmake_minimum_required(VERSION 3.24...3.31)
 
 project(GreeterDocs)
 

standalone/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14...3.22)
+cmake_minimum_required(VERSION 3.24...3.31)
 
 project(GreeterStandalone LANGUAGES CXX)
 
@@ -12,11 +12,15 @@ include(../cmake/CPM.cmake)
 
 CPMAddPackage(
   GITHUB_REPOSITORY jarro2783/cxxopts
-  VERSION 3.0.0
+  VERSION 3.2.1
   OPTIONS "CXXOPTS_BUILD_EXAMPLES NO" "CXXOPTS_BUILD_TESTS NO" "CXXOPTS_ENABLE_INSTALL YES"
 )
 
-CPMAddPackage(NAME Greeter SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/..)
+CPMAddPackage(
+  NAME Greeter
+  SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/..
+  FORCE ON
+)
 
 # ---- Create standalone executable ----
 

test/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14...3.22)
+cmake_minimum_required(VERSION 3.24...3.31)
 
 project(GreeterTests LANGUAGES CXX)
 
@@ -15,13 +15,17 @@ include(../cmake/tools.cmake)
 
 include(../cmake/CPM.cmake)
 
-CPMAddPackage("gh:doctest/doctest@2.4.9")
+CPMAddPackage("gh:doctest/doctest@2.4.11")
-CPMAddPackage("gh:TheLartians/Format.cmake@1.7.3")
+CPMAddPackage("gh:TheLartians/Format.cmake@1.8.3")
 
 if(TEST_INSTALLED_VERSION)
   find_package(Greeter REQUIRED)
 else()
-  CPMAddPackage(NAME Greeter SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/..)
+  CPMAddPackage(
+    NAME Greeter
+    SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/..
+    FORCE ON
+  )
 endif()
 
 # ---- Create binary ----
@@ -49,8 +53,13 @@ enable_testing()
 # testing frameworks add the tests target instead: add_test(NAME ${PROJECT_NAME} COMMAND
 # ${PROJECT_NAME})
 
-include(${doctest_SOURCE_DIR}/scripts/cmake/doctest.cmake)
+# prevent problems if CPM_USE_LOCAL_PACKAGES is set:
-doctest_discover_tests(${PROJECT_NAME})
+if(EXISTS ${doctest_SOURCE_DIR}/scripts/cmake/doctest.cmake)
+  include(${doctest_SOURCE_DIR}/scripts/cmake/doctest.cmake)
+  doctest_discover_tests(${PROJECT_NAME})
+else()
+  add_test(NAME ${PROJECT_NAME} COMMAND ${PROJECT_NAME})
+endif
 
 # ---- code coverage ----