allow even more static linking

CMakeLists.txt

@@ -271,29 +271,33 @@ if (KAHYPAR_ENABLE_TESTING)
 endif()
 
 
-if(NOT BUILD_SHARED_LIBS AND KAHYPAR_STATIC_LINK_DEPENDENCIES)
-  set(Boost_USE_STATIC_LIBS ON)
-endif()
 if(NOT KAHYPAR_DISABLE_BOOST)
-  if(KAHYPAR_DOWNLOAD_BOOST)
-    # Download Boost program options
-    set(BOOST_INCLUDE_LIBRARIES program_options)
-    set(BOOST_ENABLE_CMAKE ON)
-    FetchContent_Declare(
-      Boost EXCLUDE_FROM_ALL SYSTEM
-      URL https://github.com/boostorg/boost/releases/download/boost-1.86.0/boost-1.86.0-cmake.tar.gz
-    )
-    FetchContent_MakeAvailable(Boost)
-  else()
-    # Find Boost program options system library
-    find_package(Boost 1.69 REQUIRED COMPONENTS program_options)
-    if(NOT Boost_FOUND)
-      message(FATAL_ERROR "
-        Boost not found. Install Boost on your system or
-        add -DKAHYPAR_DOWNLOAD_BOOST=On to the cmake build command.")
+  block()
+    if(KAHYPAR_STATIC_LINK_DEPENDENCIES AND (NOT BUILD_SHARED_LIBS OR KAHYPAR_DOWNLOAD_BOOST))
+      set(Boost_USE_STATIC_LIBS ON)
+      set(BUILD_SHARED_LIBS OFF)
+      set(CMAKE_POSITION_INDEPENDENT_CODE ON)
     endif()
-    message(STATUS "Boost Include: ${Boost_INCLUDE_DIRS}, Boost Library: ${Boost_LIBRARY_DIRS}")
-  endif()
+    if(KAHYPAR_DOWNLOAD_BOOST)
+      # Download Boost program options
+      set(BOOST_INCLUDE_LIBRARIES program_options)
+      set(BOOST_ENABLE_CMAKE ON)
+      FetchContent_Declare(
+        Boost EXCLUDE_FROM_ALL SYSTEM
+        URL https://github.com/boostorg/boost/releases/download/boost-1.86.0/boost-1.86.0-cmake.tar.gz
+      )
+      FetchContent_MakeAvailable(Boost)
+    else()
+      # Find Boost program options system library
+      find_package(Boost 1.69 REQUIRED COMPONENTS program_options)
+      if(NOT Boost_FOUND)
+        message(FATAL_ERROR "
+          Boost not found. Install Boost on your system or
+          add -DKAHYPAR_DOWNLOAD_BOOST=On to the cmake build command.")
+      endif()
+      message(STATUS "Boost Include: ${Boost_INCLUDE_DIRS}, Boost Library: ${Boost_LIBRARY_DIRS}")
+    endif()
+  endblock()
   target_link_libraries(MtKaHyPar-Include INTERFACE Boost::program_options)
 endif()
 
@@ -307,7 +311,10 @@ if(KAHYPAR_DOWNLOAD_TBB)
     GIT_SHALLOW    FALSE  # TBB seems to assume that a git repo is present
   )
   block()
-    if(NOT KAHYPAR_STATIC_LINK_TBB)
+    if(KAHYPAR_STATIC_LINK_TBB)
+      set(BUILD_SHARED_LIBS OFF)
+      set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+    else()
       set(BUILD_SHARED_LIBS ON)
     endif()
     FetchContent_MakeAvailable(TBB)