test

# CMake strategy to find the C library libyaml using multiple approaches:

# 1. Config/Package Manager (Modern)

# 2. pkg-config (System Tooling)

# 3. Classic CMake Search (Manual)

# The goal is to set the final target to 'yaml::yaml' in all successful cases.

# The goal is to set the final target to 'YAML::YAML' in all successful cases.

# 1. CONFIG Package Search (e.g., vcpkg, Conan)

# This is the most robust method if a config file is available.

find_package(yaml CONFIG QUIET)

# Achtung: Wenn CONFIG gefunden wird, existiert das Target eventuell als 'yaml::yaml' (Kleinbuchstaben)

# oder 'YAML::YAML' (Großbuchstaben), je nach Konfigurationsdatei.

# Wir gehen hier davon aus, dass wir den Namen 'YAML::YAML' bevorzugen.

if(yaml_FOUND)

    message(STATUS "Found libyaml via CONFIG: yaml::yaml")

    # If found via CONFIG, the target yaml::yaml already exists and is configured.

    message(STATUS "Found libyaml via CONFIG: YAML::YAML (Assuming alias or correct naming)")

    # Wenn find_package(yaml) ein Target 'yaml::yaml' liefert,

    # kann hier ein ALIAS erstellt werden, um 'YAML::YAML' zu gewährleisten:

    # add_library(YAML::YAML ALIAS yaml::yaml)

    # Für diesen Fall lassen wir es, da oft das CONFIG-Script bereits den korrekten Namen liefert.

else()

    # 2. pkg-config Search (Common on Linux/MSYS)

    find_package(PkgConfig QUIET)

    if(PkgConfig_FOUND)

        # Check for the common pkg-config name 'yaml-0.1'

        pkg_check_modules(LIBYAML QUIET yaml-0.1)

    endif()

        find_path(LIBYAML_INCLUDE_DIR yaml.h

                     HINTS $ENV{LIBYAML_ROOT} ${CMAKE_PREFIX_PATH})

        # Search for library files (e.g., yaml.lib, libyaml.a, libyaml.so)

        find_library(LIBYAML_LIBRARY NAMES yaml libyaml

                     HINTS $ENV{LIBYAML_ROOT} ${CMAKE_PREFIX_PATH})

            message(STATUS "Found libyaml via classic search: ${LIBYAML_LIBRARY}")

        else()

            # If all methods fail, stop the configuration process.

            message(FATAL_ERROR "libyaml (C) not found. Please set LIBYAML_ROOT or install it.")

        endif()

    endif()

    # --- UNIFIED TARGET CREATION ---

    # 5. Create the final modern target 'yaml::yaml' 

    #    This block executes only if either pkg-config or the manual search succeeded.

    # 5. Create the final modern target 'YAML::YAML'

    if(LIBYAML_FOUND OR (LIBYAML_INCLUDE_DIR AND LIBYAML_LIBRARY))

        # Define the target as INTERFACE IMPORTED, as it only transfers link/include information.

        add_library(yaml::yaml INTERFACE IMPORTED) 

        # *** HIER IST DIE KORREKTUR: Verwende YAML::YAML (Großbuchstaben) ***

        add_library(YAML::YAML INTERFACE IMPORTED) 

        if(LIBYAML_FOUND)

            # Apply configuration from pkg-config variables (LIBYAML_INCLUDE_DIRS, etc.)

            target_include_directories(yaml::yaml INTERFACE ${LIBYAML_INCLUDE_DIRS})

            target_link_libraries(yaml::yaml INTERFACE ${LIBYAML_LIBRARIES})

            # Konfiguration aus pkg-config

            target_include_directories(YAML::YAML INTERFACE ${LIBYAML_INCLUDE_DIRS})

            target_link_libraries(YAML::YAML INTERFACE ${LIBYAML_LIBRARIES})

        elseif(LIBYAML_INCLUDE_DIR AND LIBYAML_LIBRARY)

            # Apply configuration from classic search variables

            target_include_directories(yaml::yaml INTERFACE ${LIBYAML_INCLUDE_DIR})

            target_link_libraries(yaml::yaml INTERFACE ${LIBYAML_LIBRARY})

            # Konfiguration aus klassischer Suche

            target_include_directories(YAML::YAML INTERFACE ${LIBYAML_INCLUDE_DIR})

            target_link_libraries(YAML::YAML INTERFACE ${LIBYAML_LIBRARY})

        endif()

    endif()

endif()

# 6. Finaler Status und Ziel-Überprüfung

if(TARGET YAML::YAML)

    message(STATUS "libyaml is available via target YAML::YAML.")

else()

    # Wenn CONFIG gefunden wurde, aber kein Alias auf YAML::YAML existiert, könnte dies fehlschlagen.

    # Wenn CONFIG nicht gefunden wurde, sollte der FATAL_ERROR im Code oben gegriffen haben.

    if(yaml_FOUND)

        message(FATAL_ERROR "libyaml found via CONFIG, but target YAML::YAML is not defined. Check the CONFIG script's target name.")

    else()

        message(FATAL_ERROR "Failed to configure final target YAML::YAML.") 

    endif()

endif()

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