[Bug libstdc++/64967] New: [5 Regression] Bootstrap fails due to errors in libstdc++ sources with `--enable-symvers=gnu-versioned-namespace'

[Bug libstdc++/64967] New: [5 Regression] Bootstrap fails due to errors in libstdc++ sources with `--enable-symvers=gnu-versioned-namespace'

[ai.azuma at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64967

            Bug ID: 64967
           Summary: [5 Regression] Bootstrap fails due to errors in
                    libstdc++ sources with
                    `--enable-symvers=gnu-versioned-namespace'
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ai.azuma at gmail dot com

Compile errors occur in stage 1 build of libstdc++ when trying to build GCC
5-20150201 with the following commands on an x86_64-unknown-linux-gnu machine
(Ubuntu 14.04 LTS):

  $ $SRCDIR/configure --enable-languages=c,c++
--enable-symvers=gnu-versioned-namespace
  $ make

The actual error messages are too long to paste here, but the very beginning of
them are:

/home/cryolite/work/gcc-bugs/20150207/objdir/./gcc/xgcc -shared-libgcc
-B/home/cryolite/work/gcc-bugs/20150207/objdir/./gcc -nostdinc++
-L/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/src
-L/home/cryolit
e/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs
-L/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/usr/local/x86
_64-unknown-linux-gnu/lib/ -isystem /usr/local/x86_64-unknown-linux-gnu/include
-isystem /usr/local/x86_64-unknown-linux-gnu/sys-include    -x c++-header
-nostdinc++ -g -O2 -D_GNU_SOURCE 
-I/home/cryolite/work/gcc-bugs/20150207/objdir/x86_6
4-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu
-I/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/include
-I/home/cryolite/work/gcc-bugs/20150207/gcc-5-20150201/libstdc++-v3/libsupc++
-O2
 -g -std=gnu++0x
/home/cryolite/work/gcc-bugs/20150207/gcc-5-20150201/libstdc++-v3/include/precompiled/stdc++.h
\
        -o x86_64-unknown-linux-gnu/bits/stdc++.h.gch/O2ggnu++0x.gch
In file included from
/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/include/ios:38:0,
                 from
/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/include/istream:38,
                 from
/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:38,
                 from
/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/include/complex:45,
                 from
/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/include/ccomplex:38,
                 from
/home/cryolite/work/gcc-bugs/20150207/gcc-5-20150201/libstdc++-v3/include/precompiled/stdc++.h:52:
/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/include/iosfwd:147:11:
error: ‘basic_stringbuf’ does not name a type
   typedef basic_stringbuf<char>  stringbuf;
           ^
/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/include/iosfwd:150:11:
error: ‘basic_istringstream’ does not name a type
   typedef basic_istringstream<char>  istringstream;
           ^
/home/cryolite/work/gcc-bugs/20150207/objdir/x86_64-unknown-linux-gnu/libstdc++-v3/include/iosfwd:153:11:
error: ‘basic_ostringstream’ does not name a type
   typedef basic_ostringstream<char>  ostringstream;
           ^
(snip)

Bootstrap succeeds when `--enable-symvers=gnu-versioned-namespace' is unset.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/63897] [5 Regression] gcc.dg/torture/vector-2.c fails at on x86_64-apple-darwin14
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc897

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Assuming this is fixed.  If not, please reopen.

[Bug libstdc++/64967] [5 Regression] Bootstrap fails due to errors in libstdc++ sources with `--enable-symvers=gnu-versioned-namespace'

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64967

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |5.0

[Bug libstdc++/64967] [5 Regression] Bootstrap fails due to errors in libstdc++ sources with `--enable-symvers=gnu-versioned-namespace'

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64967

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I was wondering if anyone even still uses
--enable-symvers=gnu-versioned-namespace

I don't think it is worthwhile to support the dual ABI with the versioned
namespace, since using the versioned namespace already means you don't care
about ABI compatibility.

One option would be to force --disable-libstdcxx-dual-abi when
gnu-versioned-namespace is used so that none of the new code and features are
available, another option would be to change the versioned namespace from __7
to __8 and unconditionally enable the new ABI so that all the features are
available but without any backward compatibility.

[Bug libstdc++/64967] [5 Regression] Bootstrap fails due to errors in libstdc++ sources with `--enable-symvers=gnu-versioned-namespace'

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64967

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Or drop the gnu-versioned-namespace support altogether.
Anyway, if you don't, bumping it to _8 and always using the new ABI sounds like
a good plan to me.

[Bug libstdc++/64967] [5 Regression] Bootstrap fails due to errors in libstdc++ sources with `--enable-symvers=gnu-versioned-namespace'

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64967

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2015-02-10
           Assignee|unassigned at gcc dot gnu.org      |redi at gcc dot gnu.org
     Ever confirmed|0                           |1

[Bug libstdc++/64967] [5 Regression] Bootstrap fails due to errors in libstdc++ sources with `--enable-symvers=gnu-versioned-namespace'

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64967

Jeffrey A. Law <law at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4
                 CC|                            |law at redhat dot com

--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
P4 seems more appropriate given how few people use gnu-versioned-namespace.

[Bug libstdc++/64967] [5 Regression] Bootstrap fails due to errors in libstdc++ sources with `--enable-symvers=gnu-versioned-namespace'

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64967

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Looks reasonable.

[Bug libstdc++/64967] [5 Regression] Bootstrap fails due to errors in libstdc++ sources with `--enable-symvers=gnu-versioned-namespace'

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64967

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon Mar 23 16:47:18 2015
New Revision: 221600

URL: https://gcc.gnu.org/viewcvs?rev=221600&root=gcc&view=rev
Log:
    PR libstdc++/64967
    * acinclude.m4: Disable dual ABI when gnu-versioned-namespace in use.
    * configure: Regenerate.
    * src/c++11/compatibility-c++0x.cc (error_category), generic_category,
    system_category): Use macros for versioned namespace.
    * src/c++11/futex.cc: Add missing end macro for versioned namespace.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/acinclude.m4
    trunk/libstdc++-v3/configure
    trunk/libstdc++-v3/src/c++11/compatibility-c++0x.cc
    trunk/libstdc++-v3/src/c++11/futex.cc

[Bug libstdc++/64967] [5 Regression] Bootstrap fails due to errors in libstdc++ sources with `--enable-symvers=gnu-versioned-namespace'

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64967

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed. Changing gnu-versioned-namespace to the new ABI can happen after GCC 5.