- Allow shared libraries by removing CMAKE_CXX_VISIBILITY_PRESET=hidden.

--- CMakeLists.txt.orig	2021-07-31 19:54:04 UTC
+++ CMakeLists.txt
@@ -68,7 +68,7 @@ set(CMAKE_MACOSX_RPATH ON)
 set(CMAKE_CXX_STANDARD 11)
 
 # set function visibility default to hidden
-set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+#set(CMAKE_CXX_VISIBILITY_PRESET hidden)
 set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
 
 # create a target for updating the current git hash