This library is not installed otherwise.
Make it shared has no interest.
diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index 1110890..081a245 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -13,7 +13,7 @@ add_custom_command(
 #    DEPENDS item-types
 #)
 
-add_library(cfclient
+add_library(cfclient STATIC
     client.c
     client.h
     commands.c