[Bug libstdc++/40465] New: [4.4 Regression] stdio.h related errors including *stream without cstdio at -O

[Bug libstdc++/40465] New: [4.4 Regression] stdio.h related errors including *stream without cstdio at -O

[tbm at cyrius dot com]

When I compile the following code with gcc 4.4 and -O I get a lot of header
related errors.  This doesn't happen without -O or with gcc 4.3.

Is this error expected, and if so, is there any way to improve the output from
gcc to make it clearer what's going on?


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           Summary: [4.4 Regression] stdio.h related errors including
                    *stream without cstdio at -O
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40465

[Bug libstdc++/40465] [4.4 Regression] stdio.h related errors including *stream without cstdio at -O

[tbm at cyrius dot com]

------- Comment #1 from tbm at cyrius dot com  2009-06-16 19:39 -------
#include <iostream>

namespace zlib_stream {
#include <stdio.h>
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40465

[Bug libstdc++/40465] [4.4 Regression] stdio.h related errors including *stream without cstdio at -O

[tbm at cyrius dot com]

------- Comment #2 from tbm at cyrius dot com  2009-06-16 19:40 -------
In file included from /usr/include/stdio.h:903,
                 from t.cc:4:
/usr/include/bits/stdio.h: In function 'int zlib_stream::vprintf(const char*,
__va_list_tag*)':
/usr/include/bits/stdio.h:39: error: cannot convert 'zlib_stream::_IO_FILE*' to
'FILE*' for argument '1' to 'int zlib_stream::vfprintf(FILE*, const char*,
__va_list_tag*)'
/usr/include/bits/stdio.h: In function 'int
zlib_stream::fgetc_unlocked(FILE*)':
/usr/include/bits/stdio.h:56: error: invalid use of incomplete type 'struct
_IO_FILE'
/usr/include/stdio.h:45: error: forward declaration of 'struct _IO_FILE'
/usr/include/bits/stdio.h:56: error: invalid use of incomplete type 'struct
_IO_FILE'
/usr/include/stdio.h:45: error: forward declaration of 'struct _IO_FILE'
/usr/include/bits/stdio.h:56: error: cannot convert 'FILE*' to
'zlib_stream::_IO_FILE*' for argument '1' to 'int
zlib_stream::__uflow(zlib_stream::_IO_FILE*)'
/usr/include/bits/stdio.h:56: error: invalid use of incomplete type 'struct
_IO_FILE'
/usr/include/stdio.h:45: error: forward declaration of 'struct _IO_FILE'
...


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40465

[Bug libstdc++/40465] [4.4 Regression] stdio.h related errors including *stream without cstdio at -O

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2009-06-16 19:41 -------
Putting a standard header inside a namespace is undefined.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40465

[Bug libstdc++/40465] [4.4 Regression] stdio.h related errors including *stream without cstdio at -O

[tbm at cyrius dot com]

------- Comment #3 from tbm at cyrius dot com  2009-06-16 19:41 -------
Forgot to say that adding a
#include <cstdio>
at the beginning helps.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40465