[ 0:01] + cat
[ 0:01] + not divcc prog.c -lxxx
[ 0:01] + tee file.txt
[ 0:01] + divcc prog.c -lxxx
[ 0:01] divcc: error: unable to find library -lxxx
[ 0:01] lld failed, not linked
[ 0:01] + return 0
[ 0:01] + grep 'unable to find library -lxxx' file.txt
[ 0:01] divcc: error: unable to find library -lxxx
[ 0:01] + grep 'lld failed, not linked' file.txt
[ 0:01] lld failed, not linked
[ 0:01] + test '!' -s a.out
[ 0:01] + check debris
[ 0:01] + test -e warning