Note on static linkage of RootMinimizer

ThirdParty/Fit/RootMinimizers/CMakeLists.txt

-############################################################################
-# CMakeLists.txt file for building libRootMinimizers package
-############################################################################
 set(library_name RootMinimizers)
 
-# --- source and include files ---------
 set(include_dirs
     ${CMAKE_CURRENT_SOURCE_DIR}
     ${CMAKE_CURRENT_SOURCE_DIR}/base
@@ -19,7 +15,6 @@ file(GLOB source_files
     "base/*.cxx"
 )
 
-# --- definitions ---------
 add_definitions(-DWARNINGMSG)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DMATH_NO_PLUGIN_MANAGER -DHAS_MINUIT2 -DR__HAS_MATHMORE")
 if(NOT WIN32)
@@ -28,12 +23,16 @@ else()
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4244 /wd4267")
 endif()
 
-# --- making library ------------
 add_library(${library_name} STATIC ${source_files})
+# For the time being, it has to be STATIC
+# because we don't have a DLL for the GSL library yet.
+#   (at least not up to date and from reliable source
+#    TODO: try https://www.nuget.org/packages/gsl-msvc14-x64)
+# The ROOT code in directory mathcore depends on GSL.
+
 set(${library_name}_INCLUDE_DIRS ${include_dirs} CACHE INTERNAL "")
 set(${library_name}_LIBRARY ${library_name} CACHE INTERNAL "")
 
-# --- external dependencies ---
 target_include_directories(${library_name} PUBLIC ${GSL_INCLUDE_DIR} ${Boost_INCLUDE_DIRS})
 target_link_libraries(${library_name} ${GSL_LIBRARIES} ${Boost_LIBRARIES})
 target_include_directories(${library_name} PUBLIC ${include_dirs})