[Bug middle-end/36849] New: IMA rejects to merge (function)decls with va_args

["aldot at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

$ cat > m.h <<-EOF
typedef long unsigned int size_t;
#define __THROW

/* Remap pages mapped by the range [ADDR,ADDR+OLD_LEN) to new length
   NEW_LEN.  If MREMAP_MAYMOVE is set in FLAGS the returned address
   may differ from ADDR.  If MREMAP_FIXED is set in FLAGS the function
   takes another paramter which is a fixed address at which the block
   resides after a successful call.  */
extern void *mremap (void *__addr, size_t __old_len, size_t __new_len,
                     int __flags, ...) __THROW;
EOF

$ cat >m.c<<-EOF
#define mremap _hidemremap
#include "m.h"
#undef mremap
/* normally the syscall is here */
void *mremap(void *addr, size_t osz, size_t nsz, int fl, void *ptr){return
(void*)0;}
EOF

$ cat >m_user.c<<-EOF
#include "m.h"

void *user(void)
{
        return mremap((char*)0, 0, 0, 0);
}
EOF

$ gcc-4.4-HEAD -c -combine m.c m_user.c 
In file included from m_user.c:1:
m.h:9: error: conflicting types for ?mremap?
m.c:5: error: previous definition of ?mremap? was here


Ideally the __VA_ARGS__ would be dealt with as "any or none" param decl, so the
function(s) above would be considered equal.


-- 
           Summary: IMA rejects to merge (function)decls with va_args
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: aldot at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36849