gcc/testsuite/gcc.dg/cpp/mi1.c

   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 }