strncpy triggers a build failure in Ubuntu Focal release builds

[astrogeco]

Describe the issue

make install fails on Focal RELEASE builds

https://travis-ci.com/github/astrogeco/cFS/builds/201379042

In file included from /usr/include/string.h:495,

                 from /home/travis/build/astrogeco/cFS/cfe/fsw/cfe-core/src/es/cfe_es_apps.c:49:

In function ‘strncpy’,

    inlined from ‘CFE_ES_StartAppTask’ at /home/travis/build/astrogeco/cFS/cfe/fsw/cfe-core/src/es/cfe_es_apps.c:554:9:

/usr/include/x86_64-linux-gnu/bits/string_fortified.h:106:10: error: ‘__builtin_strncpy’ output may be truncated copying 19 bytes from a string of length 19 [-Werror=stringop-truncation]

  106 |   return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));

      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

cc1: all warnings being treated as errors

Originally posted by @astrogeco in nasa/cFS#156 (comment)

Alternative Solution

Use Ubuntu Bionic for builds instead