[Bug c++/58990] New: G++ generates duplicate labels for linux 32-bit when optimization+LFS is enabled

[Bug c++/58990] New: G++ generates duplicate labels for linux 32-bit when optimization+LFS is enabled

[novulae at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58990

            Bug ID: 58990
           Summary: G++ generates duplicate labels for linux 32-bit when
                    optimization+LFS is enabled
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: novulae at hotmail dot com

GCC 4.4.5 compiles this code without issue, GCC 4.6.0 produces the below error,
as does GCC 4.8.0. This happens on linux 32-bit, but not 64-bit. I haven't
tried to see if g++ -m32 has the same issue when on linux 64-bit.

$ cat test.cpp
#include <sys/stat.h>
#include <stdint.h>

void *foo(bool var) {
  if (var) return (void*)(intptr_t)&stat;
  return (void*)(intptr_t)&stat64;
}

$ g++ -O1 -D_FILE_OFFSET_BITS=64 -c test.cpp
/tmp/ccI8JqrP.s: Assembler messages:
/tmp/ccI8JqrP.s:22: Error: symbol `stat64' is already defined

$ uname -rvmop
2.6.32-131.0.15.el6.i686 #1 SMP Tue May 10 15:42:28 EDT 2011 i686 i686
GNU/Linux

[Bug c++/58990] G++ generates duplicate labels for linux 32-bit when optimization+LFS is enabled

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58990

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Works for me with gcc 4.8.2 from Fedora 19:

[hjl@gnu-29 tmp]$ cat x.cc
#include <sys/stat.h>
#include <stdint.h>

void *foo(bool var) {
  if (var) return (void*)(intptr_t)&stat;
  return (void*)(intptr_t)&stat64;
}
[hjl@gnu-29 tmp]$ g++ -O1 -D_FILE_OFFSET_BITS=64 -c x.cc
[hjl@gnu-29 tmp]$ uname -a
Linux gnu-29.sc.intel.com 3.11.6-201.0.fc19.i686.PAE #1 SMP Sun Nov 3 12:14:57
PST 2013 i686 i686 i386 GNU/Linux
[hjl@gnu-29 tmp]$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/i686-redhat-linux/4.8.2/lto-wrapper
Target: i686-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin
--enable-initfini-array --enable-java-awt=gtk --disable-dssi
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-isl=/builddir/build/BUILD/gcc-4.8.2-20131017/obj-i686-redhat-linux/isl-install
--with-cloog=/builddir/build/BUILD/gcc-4.8.2-20131017/obj-i686-redhat-linux/cloog-install
--with-tune=generic --with-arch=i686 --build=i686-redhat-linux
Thread model: posix
gcc version 4.8.2 20131017 (Red Hat 4.8.2-1) (GCC) 
[hjl@gnu-29 tmp]$

[Bug c++/58990] G++ generates duplicate labels for linux 32-bit when optimization+LFS is enabled

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58990

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2013-11-04
     Ever confirmed|0                           |1

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Can you attach the preprocessed source?  It might be a bug in the glibc
headers.http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58990#

[Bug c++/58990] G++ generates duplicate labels for linux 32-bit when optimization+LFS is enabled

[novulae at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58990

--- Comment #3 from Caleb Sunstrum <novulae at hotmail dot com> ---
Created attachment 31160
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31160&action=edit
Preprocessed source with -O1 -D_FILE_OFFSET_BITS=64

[Bug c++/58990] G++ generates duplicate labels for linux 32-bit when optimization+LFS is enabled

[novulae at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58990

--- Comment #4 from Caleb Sunstrum <novulae at hotmail dot com> ---
Created attachment 31161
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31161&action=edit
Preprocessed source with -D_FILE_OFFSET_BITS=64

[Bug c++/58990] G++ generates duplicate labels for linux 32-bit when optimization+LFS is enabled

[novulae at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58990

--- Comment #5 from Caleb Sunstrum <novulae at hotmail dot com> ---
I've attached preprocessed source with and without -O1 on the command line. The
latter compiles, the former does not.

[Bug c++/58990] G++ generates duplicate labels for linux 32-bit when optimization+LFS is enabled

[novulae at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58990

--- Comment #6 from Caleb Sunstrum <novulae at hotmail dot com> ---
glibc on the system looks to be 2.9.2

[Bug c++/58990] G++ generates duplicate labels for linux 32-bit when optimization+LFS is enabled

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58990

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The issue is simple, GCC is generating the correct assembly.  The problem is
C++ defines extern inline differently from GNU C90 and more like C99's extern
inline.  We had a way to fix up the header files for this specific issue but it
looks like it is not happening for your version of glibc or rather the fixed up
headers are not being used as the package installer did not do that which means
this is a bug in your distro's binary package and should be reported to them.