--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/declspec-4.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,43 @@
+/* Test declaration specifiers.  Test empty declarations.  Test with
+   no special options.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+/* If a declaration does not declare a declarator, it must declare a
+   tag or the members of an enumeration, and must only contain one
+   type specifier.  */
+
+typedef int T;
+
+struct s0;
+union u0;
+enum e0; /* A GNU extension.  */
+enum { E0 };
+enum e1 { E1 };
+
+/* Not declaring anything (pedwarns).  */
+struct { int a; }; /* { dg-warning "unnamed struct/union that defines no instances" } */
+int; /* { dg-warning "useless type name in empty declaration" } */
+long; /* { dg-warning "useless type name in empty declaration" } */
+T; /* { dg-warning "useless type name in empty declaration" } */
+static const; /* { dg-warning "useless storage class specifier in empty declaration" } */
+/* { dg-warning "empty declaration" "static const" { target *-*-* } .-1 } */
+union { long b; }; /* { dg-warning "unnamed struct/union that defines no instances" } */
+
+/* Multiple type names (errors).  */
+struct s1 int; /* { dg-error "two or more data types in declaration specifiers" } */
+char union u1; /* { dg-error "two or more data types in declaration specifiers" } */
+/* { dg-warning "useless type name in empty declaration" "char union" { target *-*-* } .-1 } */
+double enum { E2 }; /* { dg-error "two or more data types in declaration specifiers" } */
+/* { dg-warning "useless type name in empty declaration" "double enum" { target *-*-* } .-1 } */
+T struct s2; /* { dg-error "two or more data types in declaration specifiers" } */
+/* { dg-warning "useless type name in empty declaration" "T struct" { target *-*-* } .-1 } */
+long union u2; /* { dg-error "two or more data types in declaration specifiers" } */
+/* { dg-warning "useless type name in empty declaration" "empty" { target *-*-* } .-1 } */
+struct s3 short; /* { dg-error "two or more data types in declaration specifiers" } */
+union u3 signed; /* { dg-error "two or more data types in declaration specifiers" } */
+unsigned struct s4; /* { dg-error "two or more data types in declaration specifiers" } */
+/* { dg-warning "useless type name in empty declaration" "empty" { target *-*-* } .-1 } */
+_Complex enum { E3 }; /* { dg-error "two or more data types in declaration specifiers" } */
+/* { dg-warning "useless type name in empty declaration" "empty" { target *-*-* } .-1 } */