Gentoo uses "msgpack-cxx" as library name and adds important
MSGPACK_NO_BOOST compile definition when msgpack-cxx us installed with USE=-boost
--- a/Tensile/Source/lib/CMakeLists.txt
+++ b/Tensile/Source/lib/CMakeLists.txt
@@ -98,22 +98,9 @@ if(TENSILE_USE_LLVM OR TENSILE_USE_MSGPACK)
 endif()
 
 if(TENSILE_USE_MSGPACK)
-    find_package(msgpack REQUIRED)
+    find_package(msgpack-cxx REQUIRED)
     target_compile_definitions(TensileHost PUBLIC -DTENSILE_MSGPACK=1)
-
-    if(TARGET msgpackc-cxx)
-        get_target_property(msgpack_inc msgpackc-cxx INTERFACE_INCLUDE_DIRECTORIES)
-    elseif(TARGET msgpackc)
-        get_target_property(msgpack_inc msgpackc INTERFACE_INCLUDE_DIRECTORIES)
-    endif()
-
-    if(DEFINED msgpack_inc)
-        # include C++ headers manually
-        # External header includes included as system files
-        target_include_directories(TensileHost 
-            SYSTEM PRIVATE $<BUILD_INTERFACE:${msgpack_inc}>
-        )
-    endif()
+    target_link_libraries(TensileHost PRIVATE msgpack-cxx)
 endif()
 
 if(TENSILE_USE_LLVM)
