# Make sure Automake simplify conditions in diagnostics.
-. ./defs || Exit 1
+. ./defs || exit 1
cat >>configure.ac <<EOF
AC_PROG_CC
AUTOMAKE_fails
grep '^Makefile.am:.*: !A and !C and !D$' stderr
# Is there only one missing condition?
-test `grep ': !' stderr | wc -l` = 1 || Exit 1
+test $(grep -c ': !' stderr) -eq 1
+
+: