1 files changed, 46 insertions, 0 deletions
diff --git a/tests/misc/seq-long-double.sh b/tests/misc/seq-long-double.sh
new file mode 100755
index 0000000..6dbb3af
--- /dev/null
+++ b/tests/misc/seq-long-double.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+# Test for this fix: 461231f022bdb3ee392622d31dc475034adceeb2.
+# Ensure that seq prints exactly two numbers for a 2-number integral
+# range at the limit of floating point precision.
+
+# Copyright (C) 2008-2020 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ seq
+getlimits_
+
+# Run this test only with glibc and sizeof (long double) > sizeof (double).
+# Otherwise, there are known failures.
+cat <<\EOF > long.c
+#include <features.h>
+#if defined __GNU_LIBRARY__ && __GLIBC__ >= 2
+int foo[sizeof (long double) - sizeof (double) - 1];
+#else
+"run this test only with glibc"
+#endif
+EOF
+$CC -c long.c \
+  || skip_ \
+     'this test runs only on systems with glibc and long double != double'
+
+a=$INTMAX_MAX
+b=$INTMAX_OFLOW
+
+seq $a $b > out || fail=1
+printf "$a\n$b\n" > exp || fail=1
+compare exp out || fail=1
+
+Exit $fail