investigate error in Ubuntu 20.04

gcontini

2020-10-13 b3e2d5007ab4d897c19fb8e039475d9f6c89b4a0

 src/library/base/CMakeLists.txt

@@ -1,7 +1,7 @@
ADD_LIBRARY(base OBJECT
    EventRegistry.cpp
    StringUtils.cpp
    file_utils.cpp
    string_utils.cpp
    base64.cpp
    logger.cpp
)