Add the option for call linkBoost() without components. In that case cmake...

Add the option for call linkBoost() without components. In that case cmake will just add the boost header dependency.

CMake/3rd/boost.cmake

-function(linkBoost components)
+function(linkBoost)
+
+    set( options )
+    set( oneValueArgs )
+    set( multiValueArgs COMPONENTS)
+    cmake_parse_arguments( ARG "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN} )
+
   if(BUILD_SHARED_LIBS)
      if (WIN32)
          set(Boost_USE_STATIC_LIBS ON)
@@ -20,8 +26,16 @@ function(linkBoost components)
 #	add_definitions( -DBOOST_ALL_DYN_LINK )
   endif()
 
-  vf_get_library_name(library_name)
-  find_package( Boost REQUIRED COMPONENTS ${components})
+    vf_get_library_name(library_name)
+    if(DEFINED ARG_COMPONENTS)
+        find_package( Boost REQUIRED COMPONENTS ${ARG_COMPONENTS})
+        target_link_libraries(${library_name} PRIVATE ${Boost_LIBRARIES})
+        message("here")
+    else()
+        find_package( Boost REQUIRED)
+        message("or here")
+    endif()
+
+
   target_include_directories(${library_name} PRIVATE ${Boost_INCLUDE_DIR})
-  target_link_libraries(${library_name} PRIVATE ${Boost_LIBRARIES})
 endfunction()

src/gpu/VirtualFluids_GPU/CMakeLists.txt

@@ -11,7 +11,7 @@ vf_add_library(PRIVATE_LINK ${libsToLink})
 
 linkMPI()
 linkCUDA()
-linkBoost("serialization")
+linkBoost(COMPONENTS "serialization")
 
 #SET(TPN_WIN32 "/EHsc")
 #https://stackoverflow.com/questions/6832666/lnk2019-when-including-asio-headers-solution-generated-with-cmake