Prepare day01 2025

Change-Id: Id3c46f5f552db5a0ba200dedc1ea4e4434932982

cmake/Findutf8cpp.cmake

@@ -0,0 +1,70 @@
+if (DEFINED _FINDUTF8CPP_INCLUDED)
+    unset(utf8cpp_FOUND CACHE)
+    unset(utf8cpp_DIR CACHE)
+    unset(utf8cpp_INCLUDE_DIR CACHE)
+    unset(utf8cpp_LIBRARIES CACHE)
+    unset(utf8cpp_VERSION CACHE)
+    return()
+endif()
+set(_FINDUTF8CPP_INCLUDED TRUE)
+
+find_package(utf8cpp QUIET)
+
+if (NOT utf8cpp_FOUND)
+    message(STATUS "utf8cpp not found. Fetching via FetchContent...")
+
+    include(FetchContent)
+
+    find_program(GIT_EXECUTABLE git)
+    if (GIT_EXECUTABLE)
+        set(UTF8CPP_FETCH_METHOD "GIT")
+    else()
+        set(UTF8CPP_FETCH_METHOD "ZIP")
+    endif()
+
+    if (UTF8CPP_FETCH_METHOD STREQUAL "GIT")
+        FetchContent_Declare(
+            utf8cpp
+            GIT_REPOSITORY https://github.com/nemtrif/utfcpp.git
+            GIT_TAG        v4.0.6
+        )
+    else()
+        FetchContent_Declare(
+            utf8cpp
+            URL https://github.com/nemtrif/utfcpp/archive/refs/tags/v4.0.6.zip
+        )
+    endif()
+
+    FetchContent_MakeAvailable(utf8cpp)
+else()
+    message(STATUS "utf8cpp found.")
+
+    # Ensure we have a usable target
+    if (NOT TARGET utf8cpp::utf8cpp)
+        if (TARGET utf8cpp)
+            add_library(utf8cpp::utf8cpp ALIAS utf8cpp)
+        else()
+            message(FATAL_ERROR "utf8cpp was found, but no CMake target 'utf8cpp' or 'utf8cpp::utf8cpp' exists.")
+        endif()
+    endif()
+
+    # Populate the standard variables
+    set(utf8cpp_FOUND TRUE)
+    set(utf8cpp_LIBRARIES utf8cpp::utf8cpp)
+    get_target_property(_utf8cpp_inc utf8cpp::utf8cpp INTERFACE_INCLUDE_DIRECTORIES)
+    set(utf8cpp_INCLUDE_DIR "${_utf8cpp_inc}")
+endif()
+
+if (NOT TARGET utf8cpp::utf8cpp)
+    if (TARGET utf8cpp)
+        add_library(utf8cpp::utf8cpp ALIAS utf8cpp)
+    else()
+        message(FATAL_ERROR "Could not find or fetch utf8cpp; no target utf8cpp or utf8cpp::utf8cpp available")
+    endif()
+endif()
+
+set(utf8cpp_FOUND        TRUE)
+set(utf8cpp_LIBRARIES    utf8cpp::utf8cpp)
+set(utf8cpp_VERSION      "${utf8cpp_VERSION}")         # this comes from the utf8cpp project
+get_target_property(_utf8cpp_inc utf8cpp::utf8cpp INTERFACE_INCLUDE_DIRECTORIES)
+set(utf8cpp_INCLUDE_DIR  "${_utf8cpp_inc}")