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-rw-r--r--gcc/testsuite/gcc.dg/cpp/warn-trigraphs-3.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/cpp/warn-trigraphs-3.c b/gcc/testsuite/gcc.dg/cpp/warn-trigraphs-3.c
new file mode 100644
index 000000000..e7537c868
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/warn-trigraphs-3.c
@@ -0,0 +1,4 @@
+// { dg-do preprocess }
+// { dg-options "-std=gnu99 -fdiagnostics-show-option -trigraphs -Werror=trigraphs" }
+/* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
+??= // { dg-error "trigraph \\?\\?= converted to # .-Werror=trigraphs." }