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-rw-r--r--gcc/testsuite/gcc.dg/countof-compat.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/countof-compat.c b/gcc/testsuite/gcc.dg/countof-compat.c
new file mode 100644
index 0000000..ab5b4ae
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/countof-compat.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-std=c2y -pedantic-errors -Wc23-c2y-compat" } */
+
+#include <stdcountof.h>
+
+int a[1];
+int b[countof(a)];
+int c[_Countof(a)]; /* { dg-warning "ISO C does not support" } */