vcpkg/ports/yaml-cpp/yaml-cpp-pr-1212.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46dc180..5055c24 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,6 +31,8 @@ cmake_dependent_option(YAML_CPP_BUILD_TESTS
 cmake_dependent_option(YAML_MSVC_SHARED_RT
   "MSVC: Build yaml-cpp with shared runtime libs (/MD)" ON
   "CMAKE_SYSTEM_NAME MATCHES Windows" OFF)
+set(YAML_CPP_INSTALL_CMAKEDIR "${CMAKE_INSTALL_LIBDIR}/cmake/yaml-cpp"
+  CACHE STRING "Path to install the CMake package to")
  
 if (YAML_CPP_FORMAT_SOURCE)
     find_program(YAML_CPP_CLANG_FORMAT_EXE NAMES clang-format)
@@ -143,13 +145,12 @@ set_target_properties(yaml-cpp PROPERTIES
   PROJECT_LABEL "yaml-cpp ${yaml-cpp-label-postfix}"
   DEBUG_POSTFIX "${CMAKE_DEBUG_POSTFIX}")
 
-set(CONFIG_EXPORT_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/yaml-cpp")
-set(EXPORT_TARGETS yaml-cpp)
+set(EXPORT_TARGETS yaml-cpp::yaml-cpp)
 configure_package_config_file(
   "${PROJECT_SOURCE_DIR}/yaml-cpp-config.cmake.in"
   "${PROJECT_BINARY_DIR}/yaml-cpp-config.cmake"
-  INSTALL_DESTINATION "${CONFIG_EXPORT_DIR}"
-  PATH_VARS CMAKE_INSTALL_INCLUDEDIR CMAKE_INSTALL_LIBDIR CONFIG_EXPORT_DIR YAML_BUILD_SHARED_LIBS)
+  INSTALL_DESTINATION "${YAML_CPP_INSTALL_CMAKEDIR}"
+  PATH_VARS CMAKE_INSTALL_INCLUDEDIR CMAKE_INSTALL_LIBDIR)
 unset(EXPORT_TARGETS)
 
 write_basic_package_version_file(
@@ -169,15 +170,14 @@ if (YAML_CPP_INSTALL)
                 FILES_MATCHING PATTERN "*.h")
   install(EXPORT yaml-cpp-targets
     NAMESPACE yaml-cpp::
-    DESTINATION "${CONFIG_EXPORT_DIR}")
+    DESTINATION "${YAML_CPP_INSTALL_CMAKEDIR}")
   install(FILES
       "${PROJECT_BINARY_DIR}/yaml-cpp-config.cmake"
       "${PROJECT_BINARY_DIR}/yaml-cpp-config-version.cmake"
-    DESTINATION "${CONFIG_EXPORT_DIR}")
+    DESTINATION "${YAML_CPP_INSTALL_CMAKEDIR}")
   install(FILES "${PROJECT_BINARY_DIR}/yaml-cpp.pc"
     DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 endif()
-unset(CONFIG_EXPORT_DIR)
 
 if(YAML_CPP_BUILD_TESTS)
   add_subdirectory(test)
diff --git a/yaml-cpp-config.cmake.in b/yaml-cpp-config.cmake.in
index 799b9b4..cbbc773 100644
--- a/yaml-cpp-config.cmake.in
+++ b/yaml-cpp-config.cmake.in
@@ -11,12 +11,23 @@ set_and_check(YAML_CPP_INCLUDE_DIR "@PACKAGE_CMAKE_INSTALL_INCLUDEDIR@")
 set_and_check(YAML_CPP_LIBRARY_DIR "@PACKAGE_CMAKE_INSTALL_LIBDIR@")
 
 # Are we building shared libraries?
-set(YAML_CPP_SHARED_LIBS_BUILT "@PACKAGE_YAML_BUILD_SHARED_LIBS@")
+set(YAML_CPP_SHARED_LIBS_BUILT @YAML_BUILD_SHARED_LIBS@)
 
 # Our library dependencies (contains definitions for IMPORTED targets)
-include(@PACKAGE_CONFIG_EXPORT_DIR@/yaml-cpp-targets.cmake)
+include("${CMAKE_CURRENT_LIST_DIR}/yaml-cpp-targets.cmake")
 
 # These are IMPORTED targets created by yaml-cpp-targets.cmake
 set(YAML_CPP_LIBRARIES "@EXPORT_TARGETS@")
 
-check_required_components(@EXPORT_TARGETS@)
+# Protect against multiple inclusion, which would fail when already imported targets are added once more.
+if(NOT TARGET yaml-cpp)
+  add_library(yaml-cpp INTERFACE IMPORTED)
+  target_link_libraries(yaml-cpp INTERFACE yaml-cpp::yaml-cpp)
+  if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.17)
+    set_target_properties(yaml-cpp PROPERTIES
+      DEPRECATION "The target yaml-cpp is deprecated and will be removed in version 0.10.0. Use the yaml-cpp::yaml-cpp target instead."
+    )
+  endif()
+endif()
+
+check_required_components(yaml-cpp)