--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/Wc90-c99-compat-8.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,56 @@
+/* { dg-do compile } */
+/* { dg-options "-std=gnu90 -pedantic-errors -Wc90-c99-compat" } */
+
+_Bool b; /* { dg-error "ISO C90 does not support boolean types" } */
+_Complex double c = __builtin_complex (0.0, 0.0); /* { dg-error "ISO C90 does not support complex types" } */
+long long l; /* { dg-error "ISO C90 does not support .long long." } */
+struct A { int i; char a[]; }; /* { dg-error "ISO C90 does not support flexible array members" } */
+struct { long int b: 2; } s; /* { dg-error "type of bit-field .b. is a GCC extension" } */
+const const int i; /* { dg-error "duplicate .const." } */
+volatile volatile v; /* { dg-error "duplicate .volatile." } */
+
+struct S { int a[2]; };
+extern struct S foo (void);
+
+#define V(v, ...) (v, __VA_ARGS) /* { dg-error "anonymous variadic macros were introduced in C99" } */
+
+enum { E, }; /* { dg-error "comma at end of enumerator list" } */
+
+void fn1 (char [*]); /* { dg-error "ISO C90 does not support .\\\[\\\*\\\]. array declarators" } */
+
+void
+fn2 (char x[static 4]) /* { dg-error "ISO C90 does not support .static. or type qualifiers" } */
+{
+  int i = (int) { 1 }; /* { dg-error "ISO C90 forbids compound literals" } */
+  struct A a = { .i = 3 }; /* { dg-error "ISO C90 forbids specifying subobject to initialize" } */
+}
+
+void
+fn3 (int n)
+{
+  n = 3;
+  int i; /* { dg-error "ISO C90 forbids mixed declarations and code" } */
+}
+
+void
+fn4 (int n)
+{
+  n = 3;
+  __extension__ int i; /* { dg-error "ISO C90 forbids mixed declarations and code" } */
+}
+
+void
+fn5 (void)
+{
+  (foo ()).a[0]; /* { dg-error "ISO C90 forbids subscripting non-lvalue array" } */
+}
+
+#define F(a) a
+
+void
+fn6 (void)
+{
+  F(); /* { dg-error "invoking macro F argument" } */
+}
+
+void fn7 (int n, int a[n]); /* { dg-error "ISO C90 forbids variable length array .a." } */