1 /* Test "ignore redundant include" facility.
2 
3    We must test with C and C++ comments, and null directives, outside
4    the guard conditional; also, we test guarding with #ifndef and #if
5    !defined.  -H is used because cpp might confuse the issue by
6    optimizing out #line markers.  This test only passes if each of the
7    headers is read exactly once.
8 
9    The disgusting regexp in the dg-error line, when stuck into
10    dg.exp's compiler-output regexp, matches the correct -H output and
11    only the correct -H output.  It has to be all on one line because
12    otherwise it will not be interpreted all in one unit.  */
13 
14 /* { dg-do compile }
15    { dg-options "-H" }
16    { dg-error "mi1c\.h\n\[^\n\]*mi1cc\.h\n\[^\n\]*mi1nd\.h\n\[^\n\]*mi1ndp\.h\n\[^\n\]*mi1x\.h" "redundant include check" { target *-*-* } 0 } */
17 
18 #include "mi1c.h"
19 #include "mi1c.h"
20 #include "mi1c.h"
21 
22 #include "mi1cc.h"
23 #include "mi1cc.h"
24 
25 #include "mi1nd.h"
26 #include "mi1nd.h"
27 
28 #include "mi1ndp.h"
29 #include "mi1ndp.h"
30 
31 #define MIX_H
32 #include "mi1x.h"
33 #include "mi1x.h"
34 
35 int
36 main (void)
37 {
38   return a + b + c + d;
39 }
40