From: Michael R. Crusoe <michael.crusoe@gmail.com>
Subject: Make doxygen docs reproducible

--- libcereal.orig/doc/doxygen.in
+++ libcereal/doc/doxygen.in
@@ -130,7 +130,7 @@
 # relative paths, which will be relative from the directory where doxygen is
 # started.
 
-STRIP_FROM_PATH        =
+STRIP_FROM_PATH        = @CMAKE_CURRENT_SOURCE_DIR@
 
 # The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of
 # the path mentioned in the documentation of a class, which tells
