Source: mono Version: 4.6.2.7+dfsg-1 Severity: serious Tags: ftbfs https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/mono.html
...
processes.c: In function 'load_modules':
processes.c:1653:12: error: implicit declaration of function 'makedev'
[-Werror=implicit-function-declaration]
device = makedev ((int)maj_dev, (int)min_dev);
^~~~~~~
