1 // RUN: rm -rf %t
2 // RUN: mkdir %t
3 // RUN: echo 'struct a;' > %t/a.h
4 // RUN: echo 'struct b {}; void foo(struct b*);' > %t/b.h
5 // RUN: echo 'module X { module a { header "a.h" } module b { header "b.h" } }' > %t/x.modulemap
6 // RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t -fmodule-map-file=%t/x.modulemap %s -I%t -verify
7 
8 #include "a.h"
9 
10 void f(struct a *p);
11 
12 // FIXME: We should warn that 'b' will not be visible outside of this function,
13 // but we merge this 'b' with X.b's 'b' because we don't yet implement C's
14 // "compatible types" rule.
15 void g(struct b *p);
16 
17 struct b b; // expected-error {{'b' must be defined before it is used}}
18 // expected-note@b.h:1 {{here}}
19