diff --git a/CMakeLists.txt b/CMakeLists.txt
index 27b8e7f1..9e341f6f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -100,11 +100,17 @@ if(APPLE)
   set(TRY_RUN_INCLUDE_DIRECTORIES ${HOMEBREW_PREFIX_PATH}/include)
 endif()
 
-if(BUILD_SHARED_LIBS)
-  message(WARNING "Building shared libraries is unsupported. Setting BUILD_SHARED_LIBS to OFF.")
+if(BUILD_SHARED_LIBS AND STATIC_BUILD_DO_NOT_USE)
+  message(FATAL_ERROR "Seriously, don't try setting both BUILD_SHARED_LIBS and STATIC_BUILD_DO_NOT_USE")
+endif()
+
+if(WIN32 OR STATIC_BUILD_DO_NOT_USE)
+  set(BUILD_SHARED_LIBS OFF)
+  set(CMAKE_POSITION_INDEPENDENT_CODE OFF)
+else()
+  set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 endif()
 
-set(BUILD_SHARED_LIBS OFF)
 set(CMAKE_CXX_SCAN_FOR_MODULES OFF)
 
 if(NOT DISABLE_CCACHE)