[instructions] Add instructions to compile in Ubuntu-20.04.

6 jobs for devel in 3 minutes and 33 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #111001
allowed to fail
devel-16.04-build

00:03:33

failed #111000
devel-18.04-build

00:00:46

 
  Test
skipped #111003
allowed to fail
devel-16.04-test
skipped #111002
allowed to fail
devel-18.04-test
 
  Deploy
skipped #111005
allowed to fail
devel-16.04-doc
skipped #111004
allowed to fail
devel-18.04-doc
 
Name Stage Failure
failed
devel-16.04-build Build
Running after_script
Running after script...
$ mv $DEVEL_HPP_DIR $CI_PROJECT_DIR
Uploading artifacts for failed job
Uploading artifacts...
workspace: found 5 matching files and directories

Uploading artifacts as "archive" to coordinator... ok
id=111001 responseStatus=201 Created token=MEyiWwBF
Cleaning up file based variables
ERROR: Job failed: exit code 1
failed
devel-18.04-build Build
Running after_script
Running after script...
$ mv $DEVEL_HPP_DIR $CI_PROJECT_DIR
Uploading artifacts for failed job
Uploading artifacts...
workspace: found 5 matching files and directories

Uploading artifacts as "archive" to coordinator... ok
id=111000 responseStatus=201 Created token=zecdCvps
Cleaning up file based variables
ERROR: Job failed: exit code 1