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// RUN: rm -rf %t
// RUN: mkdir -p %t
// RUN: split-file %s %t
//
// RUN: %clang_cc1 -std=c++20 %t/A.cppm -emit-module-interface -o %t/A.pcm
// RUN: %clang_cc1 -std=c++20 %t/B.cppm -fprebuilt-module-path=%t -emit-module-interface -o %t/B.pcm
// RUN: %clang_cc1 -fsyntax-only -std=c++20 -fprebuilt-module-path=%t -verify %t/C.cpp
//--- A.cppm
export module A;
export extern "C" void foo(struct Bar);
//--- B.cppm
module;
import A;
export module B;
//--- C.cpp
import B;
struct Bar {};
void test() {
foo(Bar());
// expected-error@-1 {{declaration of 'foo' must be imported}}
// expected-note@A.cppm:2 {{declaration here is not visible}}
}
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