Prepare day01 2025

Change-Id: Id3c46f5f552db5a0ba200dedc1ea4e4434932982

cmake/Findfmt.cmake

@@ -0,0 +1,70 @@
+if (DEFINED _FINDFMT_INCLUDED)
+    unset(fmt_FOUND CACHE)
+    unset(fmt_DIR CACHE)
+    unset(fmt_INCLUDE_DIR CACHE)
+    unset(fmt_LIBRARIES CACHE)
+    unset(fmt_VERSION CACHE)
+    return()
+endif()
+set(_FINDFMT_INCLUDED TRUE)
+
+find_package(fmt QUIET)
+
+if (NOT fmt_FOUND)
+    message(STATUS "fmt not found. Fetching via FetchContent...")
+
+    include(FetchContent)
+
+    find_program(GIT_EXECUTABLE git)
+    if (GIT_EXECUTABLE)
+        set(FMT_FETCH_METHOD "GIT")
+    else()
+        set(FMT_FETCH_METHOD "ZIP")
+    endif()
+
+    if (FMT_FETCH_METHOD STREQUAL "GIT")
+        FetchContent_Declare(
+            fmt
+            GIT_REPOSITORY https://github.com/fmtlib/fmt.git
+            GIT_TAG        12.0.0
+        )
+    else()
+        FetchContent_Declare(
+            fmt
+            URL https://github.com/fmtlib/fmt/releases/download/12.0.0/fmt-12.0.0.zip
+        )
+    endif()
+
+    FetchContent_MakeAvailable(fmt)
+else()
+    message(STATUS "fmt found.")
+
+    # Ensure we have a usable target
+    if (NOT TARGET fmt::fmt)
+        if (TARGET fmt)
+            add_library(fmt::fmt ALIAS fmt)
+        else()
+            message(FATAL_ERROR "fmt was found, but no CMake target 'fmt' or 'fmt::fmt' exists.")
+        endif()
+    endif()
+
+    # Populate the standard variables
+    set(fmt_FOUND TRUE)
+    set(fmt_LIBRARIES fmt::fmt)
+    get_target_property(_fmt_inc fmt::fmt INTERFACE_INCLUDE_DIRECTORIES)
+    set(fmt_INCLUDE_DIR "${_fmt_inc}")
+endif()
+
+if (NOT TARGET fmt::fmt)
+    if (TARGET fmt)
+        add_library(fmt::fmt ALIAS fmt)
+    else()
+        message(FATAL_ERROR "Could not find or fetch fmt; no target fmt or fmt::fmt available")
+    endif()
+endif()
+
+set(fmt_FOUND        TRUE)
+set(fmt_LIBRARIES    fmt::fmt)
+set(fmt_VERSION      "${fmt_VERSION}")         # this comes from the fmt project
+get_target_property(_fmt_inc fmt::fmt INTERFACE_INCLUDE_DIRECTORIES)
+set(fmt_INCLUDE_DIR  "${_fmt_inc}")