1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/format/ext-4.c b/gcc/testsuite/gcc.dg/format/ext-4.c
new file mode 100644
index 0000000..c0cf740
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/format/ext-4.c
@@ -0,0 +1,20 @@
+/* Test for scanf formats.  %a extensions.  */
+/* Origin: Joseph Myers <jsm28@cam.ac.uk> */
+/* { dg-do compile } */
+/* { dg-options "-std=gnu89 -Wformat" } */
+
+typedef __WCHAR_TYPE__ wchar_t;
+
+extern int scanf (const char *, ...);
+
+void
+foo (char **sp, wchar_t **lsp)
+{
+  /* %a formats for allocation, only recognised in C90 mode, are a
+     GNU extension.  Followed by other characters, %a is not treated
+     specially.
+  */
+  scanf ("%as", sp);
+  scanf ("%aS", lsp);
+  scanf ("%a[bcd]", sp);
+}