Another try.

Author: redboltz

CMakeLists.txt

@@ -67,7 +67,9 @@ ENDIF ()
 IF (MSGPACK_USE_BOOST)
     IF ((CMAKE_VERSION VERSION_GREATER 3.30) OR
         (CMAKE_VERSION VERSION_EQUAL 3.30))
-        CMAKE_POLICY(SET CMP0167 NEW)
+        IF (NOT MSGPACK_BOOST_USE_OLD_CMAKE)
+            CMAKE_POLICY(SET CMP0167 NEW)
+        ENDIF ()
     ENDIF ()
     SET (Boost_USE_MULTITHREADED ON)
 
@@ -79,7 +81,7 @@ IF (MSGPACK_USE_BOOST)
         SET (Boost_USE_STATIC_LIBS FALSE)
     ENDIF ()
 
-    FIND_PACKAGE (Boost REQUIRED CONFIG)
+    FIND_PACKAGE (Boost REQUIRED)
 ELSE ()
     TARGET_COMPILE_DEFINITIONS(msgpack-cxx INTERFACE MSGPACK_NO_BOOST)
 ENDIF ()

appveyor.yml

@@ -61,7 +61,7 @@ build_script:
           $env:cpp11 `
           -D MSGPACK_BUILD_EXAMPLES=ON `
           -D MSGPACK_BUILD_TESTS=ON `
-          -D Boost_NO_BOOST_CMAKE=ON `
+          -D MSGPACK_BOOST_USE_OLD_CMAKE=ON `
           -D CMAKE_EXE_LINKER_FLAGS=/LIBPATH:"$env:boost_prefix\$env:boost_subdir" `
           -D CMAKE_PREFIX_PATH="$env:boost_prefix;$env:APPVEYOR_BUILD_FOLDER\zlib-1.3.1\prefix" `
           -D CMAKE_INSTALL_PREFIX="$env:APPVEYOR_BUILD_FOLDER\prefix" `