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-rw-r--r--gcc/testsuite/g++.dg/parse/linkage1.C11
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diff --git a/gcc/testsuite/g++.dg/parse/linkage1.C b/gcc/testsuite/g++.dg/parse/linkage1.C
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+// PR c++/26068
+
+extern "C" auto int a; // { dg-error "linkage" }
+extern "C" register int b; // { dg-error "linkage" }
+extern "C" static void c(); // { dg-error "linkage" }
+extern "C" extern void d(); // { dg-error "linkage" }
+extern "C" mutable int e; // { dg-error "linkage" }
+
+extern "C" {
+ static void f();
+}