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Date: Tue, 03 Nov 2009 06:29:00 -0000
Subject: [Bug lto/41921]  New: Cross language don't work with unnamed structs
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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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With a C++ file as:
extern "C" {
  typedef struct {} CvImage;
     extern CvImage* Cv_ImageNew(void);
     }
 extern void _Raytrace(CvImage* LImage);
       int main(int LArgC, char** LArgV) 
{
  CvImage* LImage = Cv_ImageNew();
  _Raytrace(LImage);
 }
--- CUT --
And a C file as:

  typedef struct {} CvImage;
 CvImage* Cv_ImageNew(void) { }

--- CUT ---
We get an ICE when doing:
 gcc -O3 -flto -r -nostdlib t0.cc t1.c
In file included from :0:0:
t0.cc: In function ‘main’:
t0.cc:6:12: error: non-trivial conversion at assignment
struct CvImage *
struct 
{
} *
LImage_1 = D.1869_4(D);

t0.cc:6:12: internal compiler error: verify_stmts failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
lto-wrapper: /home/apinski/change-gcc/bin/gcc returned 1 exit status
collect2: lto-wrapper returned 1 exit status


-- 
           Summary: Cross language don't work with unnamed structs
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: lto
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41921