================
@@ -0,0 +1,112 @@
+// RUN: %clang_cc1 -fsycl-is-device -std=c++17 -fsyntax-only -verify -DCPP17 %s
+// RUN: %clang_cc1 -fsycl-is-device -std=c++20 -fsyntax-only -verify -DCPP20 %s
+
+// Semantic tests for the sycl_external attribute.
+
+// expected-error@+1{{'sycl_external' can only be applied to functions with
external linkage}}
+[[clang::sycl_external]]
+static void func1() {}
+
+// expected-error@+2{{'sycl_external' can only be applied to functions with
external linkage}}
+namespace {
+ [[clang::sycl_external]]
+ void func2() {}
+
+ struct UnnX {};
+}
+
+// expected-error@+2{{'sycl_external' can only be applied to functions with
external linkage}}
+namespace { struct S4 {}; }
+[[clang::sycl_external]] void func4(S4) {}
+
+// FIXME: This case is currently being diagnosed as an error because clang
implements
+// default inheritance of attribute and explicit instantiation declaration
names the
+// symbol that causes the instantiated specialization to have internal linkage.
----------------
schittir wrote:
I see. Thank you for clarifying it with the text from spec for the other case.
https://github.com/llvm/llvm-project/pull/140282
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