[ 0:00] + cat
[ 0:00] + not dioscc prog.c -lxxx
[ 0:00] + tee file.txt
[ 0:00] failed to link, ld exited with exitcode = 1, signal = 0
[ 0:00] stderr:
[ 0:00]     /usr/bin/ld: cannot find -lxxx
[ 0:00] 
[ 0:00] 
[ 0:00] + egrep 'unable to find library -lxxx|cannot find -lxxx' file.txt
[ 0:00]     /usr/bin/ld: cannot find -lxxx
[ 0:00] + egrep 'lld failed, not linked|failed to link, ld exited with exitcode' file.txt
[ 0:00] failed to link, ld exited with exitcode = 1, signal = 0
[ 0:00] + test '!' -s a.out
[ 0:00] + check debris
[ 0:00] + test -e warning