Try to use UNITY_BUILD

With CMAKE_UNITY_BUILD there are build error with ftxui!

Quickfix: don't build ftxui_sample if CMAKE_UNITY_BUILD is set.

Author: ClausKlein

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.21)
+cmake_minimum_required(VERSION 3.21...3.27)
 
 # This template attempts to be "fetch_content"-able
 # so that it works well with tools like CPM or other

CMakePresets.json

@@ -50,6 +50,9 @@
                     "Darwin"
                 ]
             },
+            "cacheVariables": {
+                "CMAKE_UNITY_BUILD": true
+            },
             "vendor": {
                 "microsoft.com/VisualStudioRemoteSettings/CMake/1.0": {
                     "sourceDir": "$env{HOME}/.vs/$ms{projectDirName}"
@@ -142,6 +145,8 @@
             "description": "Target Unix-like OS with the gcc compiler, debug build type",
             "inherits": "conf-unixlike-common",
             "cacheVariables": {
+                "myproject_ENABLE_COVERAGE": false,
+                "CMAKE_SKIP_INSTALL_RULES": true,
                 "CMAKE_C_COMPILER": "gcc",
                 "CMAKE_CXX_COMPILER": "g++",
                 "CMAKE_BUILD_TYPE": "Debug"
@@ -164,6 +169,8 @@
             "description": "Target Unix-like OS with the clang compiler, debug build type",
             "inherits": "conf-unixlike-common",
             "cacheVariables": {
+                "myproject_ENABLE_COVERAGE": false,
+                "CMAKE_SKIP_INSTALL_RULES": true,
                 "CMAKE_C_COMPILER": "clang",
                 "CMAKE_CXX_COMPILER": "clang++",
                 "CMAKE_BUILD_TYPE": "Debug"
@@ -251,4 +258,4 @@
             "configurePreset": "unixlike-clang-release"
         }
     ]
-}
+}

ProjectOptions.cmake

@@ -53,9 +53,9 @@ macro(myproject_setup_options)
     option(myproject_ENABLE_SANITIZER_UNDEFINED "Enable undefined sanitizer" ${SUPPORTS_UBSAN})
     option(myproject_ENABLE_SANITIZER_THREAD "Enable thread sanitizer" OFF)
     option(myproject_ENABLE_SANITIZER_MEMORY "Enable memory sanitizer" OFF)
-    option(myproject_ENABLE_UNITY_BUILD "Enable unity builds" OFF)
-    option(myproject_ENABLE_CLANG_TIDY "Enable clang-tidy" ON)
-    option(myproject_ENABLE_CPPCHECK "Enable cpp-check analysis" ON)
+    option(myproject_ENABLE_UNITY_BUILD "Enable unity builds" ON)
+    option(myproject_ENABLE_CLANG_TIDY "Enable clang-tidy" OFF)
+    option(myproject_ENABLE_CPPCHECK "Enable cpp-check analysis" OFF)
     option(myproject_ENABLE_PCH "Enable precompiled headers" OFF)
     option(myproject_ENABLE_CACHE "Enable ccache" ON)
   endif()

src/CMakeLists.txt

@@ -1,2 +1,4 @@
 add_subdirectory(sample_library)
-add_subdirectory(ftxui_sample)
+if(NOT CMAKE_UNITY_BUILD)
+  add_subdirectory(ftxui_sample)
+endif()

test/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15...3.23)
+cmake_minimum_required(VERSION 3.21...3.27)
 
 project(CmakeConfigPackageTests LANGUAGES CXX)
 
@@ -19,15 +19,17 @@ endif()
 
 include(${Catch2_SOURCE_DIR}/extras/Catch.cmake)
 
-# Provide a simple smoke test to make sure that the CLI works and can display a --help message
-add_test(NAME cli.has_help COMMAND intro --help)
+if(TARGET intro)
+  # Provide a simple smoke test to make sure that the CLI works and can display a --help message
+  add_test(NAME cli.has_help COMMAND intro --help)
 
-# Provide a test to verify that the version being reported from the application
-# matches the version given to CMake. This will be important once you package
-# your program. Real world shows that this is the kind of simple mistake that is easy
-# to make, but also easy to test for.
-add_test(NAME cli.version_matches COMMAND intro --version)
-set_tests_properties(cli.version_matches PROPERTIES PASS_REGULAR_EXPRESSION "${PROJECT_VERSION}")
+  # Provide a test to verify that the version being reported from the application
+  # matches the version given to CMake. This will be important once you package
+  # your program. Real world shows that this is the kind of simple mistake that is easy
+  # to make, but also easy to test for.
+  add_test(NAME cli.version_matches COMMAND intro --version)
+  set_tests_properties(cli.version_matches PROPERTIES PASS_REGULAR_EXPRESSION "${PROJECT_VERSION}")
+endif()
 
 add_executable(tests tests.cpp)
 target_link_libraries(