diff -Nrup a/build_files/cmake/macros.cmake b/build_files/cmake/macros.cmake
--- a/build_files/cmake/macros.cmake	2020-02-13 10:42:10.000000000 +0100
+++ b/build_files/cmake/macros.cmake	2020-02-17 11:40:58.027385047 +0100
@@ -249,7 +249,7 @@ function(blender_add_lib__impl
   blender_include_dirs("${includes}")
   blender_include_dirs_sys("${includes_sys}")
 
-  add_library(${name} ${sources})
+  add_library(${name} STATIC ${sources})
 
   # On Windows certain libraries have two sets of binaries: one for debug builds and one for
   # release builds. The root of this requirement goes into ABI, I believe, but that's outside