[PATCH resend 2/2] PR c/65403 - Add tests for -Wno-error=<some-future-option>

[Alex Henrie <alexhenrie24 at gmail dot com>]

	* c-c++-common/pr65403-1.c: New test.
	* c-c++-common/pr65403-2.c: New test.
---
 gcc/testsuite/c-c++-common/pr65403-1.c | 10 ++++++++++
 gcc/testsuite/c-c++-common/pr65403-2.c | 15 +++++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 gcc/testsuite/c-c++-common/pr65403-1.c
 create mode 100644 gcc/testsuite/c-c++-common/pr65403-2.c

diff --git a/gcc/testsuite/c-c++-common/pr65403-1.c b/gcc/testsuite/c-c++-common/pr65403-1.c
new file mode 100644
index 00000000000..fbe004a1f78
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/pr65403-1.c
@@ -0,0 +1,10 @@
+/* PR c/65403 */
+/* Test an unrecognized -Wno-error option in the absence of any other
+   diagnostics. The -Wno-error option should be ignored. */
+
+/* { dg-options "-Werror -Wno-error=some-future-warning" } */
+
+int main(int argc, char **argv)
+{
+  return 0;
+}
diff --git a/gcc/testsuite/c-c++-common/pr65403-2.c b/gcc/testsuite/c-c++-common/pr65403-2.c
new file mode 100644
index 00000000000..8b5faa7270e
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/pr65403-2.c
@@ -0,0 +1,15 @@
+/* PR c/65403 */
+/* Test a warning, treated as an error, that some future -Wno-error option
+   might downgrade back to a warning. The -Wno-error option should produce a
+   warning in this case. */
+
+/* { dg-options "-Wunused-variable -Werror -Wno-error=some-future-warning" } */
+
+int main(int argc, char **argv)
+{
+  int foo; /* { dg-error "unused variable 'foo'" } */
+  return 0;
+}
+
+/* { dg-error "no option '-Wsome-future-warning'" "" { target *-*-* } 0 } */
+/* { dg-message "all warnings being treated as errors" "" { target *-*-* } 0 } */
-- 
2.23.0