[Bug bootstrap/53675] New: [4.8 Regression] bootstrap fails on netbsd5.1 due to unsupported dwarf4 info

[Bug bootstrap/53675] New: [4.8 Regression] bootstrap fails on netbsd5.1 due to unsupported dwarf4 info

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53675

             Bug #: 53675
           Summary: [4.8 Regression] bootstrap fails on netbsd5.1 due to
                    unsupported dwarf4 info
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: redi@gcc.gnu.org
              Host: x86_64-unknown-netbsd5.1
            Target: x86_64-unknown-netbsd5.1
             Build: x86_64-unknown-netbsd5.1


Created attachment 27621
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27621
build log

Bootstrap fails on gcc70 in the compile farm with linker errors like this:

/usr/bin/ld: Dwarf Error: found dwarf version '4', this reader only handles
version 2 information.
../src/c++11/.libs/libc++11convenience.a(functexcept.o): In function
`_ZZSt9call_onceIMNSt13__future_base11_State_baseEFvRSt8functionIFSt10unique_ptrINS0_12_Result_baseENS4_8_DeleterEEvEERbEJKPS1_St17reference_wrapperIS8_ESF_IbEEEvRSt9once_flagOT_DpOT0_ENUlvE_4_FUNEv':
functexcept.cc:(.text._ZZSt9call_onceIMNSt13__future_base11_State_baseEFvRSt8functionIFSt10unique_ptrINS0_12_Result_baseENS4_8_DeleterEEvEERbEIKPS1_St17reference_wrapperIS8_ESF_IbEEEvRSt9once_flagOT_DpOT0_ENUlvE_4_FUNEv+0x0):
multiple definition of
`_ZZSt9call_onceIMNSt13__future_base11_State_baseEFvRSt8functionIFSt10unique_ptrINS0_12_Result_baseENS4_8_DeleterEEvEERbEIKPS1_St17reference_wrapperIS8_ESF_IbEEEvRSt9once_flagOT_DpOT0_ENUlvE_4_FUNEv'
/usr/bin/ld: Dwarf Error: found dwarf version '4', this reader only handles
version 2 information.
.libs/compatibility-thread-c++0x.o:compatibility-thread-c++0x.cc:(.text._ZZSt9call_onceIMNSt13__future_base11_State_baseEFvRSt8functionIFSt10unique_ptrINS0_12_Result_baseENS4_8_DeleterEEvEERbEIKPS1_St17reference_wrapperIS8_ESF_IbEEEvRSt9once_flagOT_DpOT0_ENUlvE_4_FUNEv+0x0):
first defined here
../src/c++11/.libs/libc++11convenience.a(functexcept.o): In function
`_ZZSt9call_onceIMSt6threadFvvEJSt17reference_wrapperIS0_EEEvRSt9once_flagOT_DpOT0_ENUlvE_4_FUNEv':
functexcept.cc:(.text._ZZSt9call_onceIMSt6threadFvvEISt17reference_wrapperIS0_EEEvRSt9once_flagOT_DpOT0_ENUlvE_4_FUNEv+0x0):
multiple definition of
`_ZZSt9call_onceIMSt6threadFvvEISt17reference_wrapperIS0_EEEvRSt9once_flagOT_DpOT0_ENUlvE_4_FUNEv'
.libs/compatibility-thread-c++0x.o:compatibility-thread-c++0x.cc:(.text._ZZSt9call_onceIMSt6threadFvvEISt17reference_wrapperIS0_EEEvRSt9once_flagOT_DpOT0_ENUlvE_4_FUNEv+0x0):
first defined here

Binutils is pretty old:

ld -V
GNU ld version 2.16.1
  Supported emulations:
   elf_x86_64
   elf_i386
   i386nbsd

Configure command is:

/home/jwakely/src/gcc/configure --prefix=/home/jwakely/gcc/4.x
--with-system-zlib --with-gnu-ld --with-gnu-as --with-dwarf2
--enable-languages=c,c++ --disable-libquadmath --disable-libmudflap
--disable-libitm --disable-decimal-float --disable-nls

Note that I specifically requested --with-dwarf2, which makes no difference.

[Bug bootstrap/53675] [4.8 Regression] bootstrap fails on netbsd5.1 due to unsupported dwarf4 info

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53675

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.8.0

[Bug bootstrap/53675] [4.8 Regression] bootstrap fails on netbsd5.1 due to unsupported dwarf4 info

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53675

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-06-15 19:43:30 UTC ---
Created attachment 27627
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27627
Build log with new binutils

Using a newer binutils (2.22) the errors about dwarf4 are gone, but the
multiple definition errors remain.

GCC still shouldn't be issuing DWARF4 info when the linker doesn't support it
and --with-dwarf2 is used, but that's not the problem.

Every file that includes <mutex> and uses std::call_once gets a multiple
definition error for the lambda expression on line 815

../src/c++11/.libs/libc++11convenience.a(future.o): In function `operator()':
/home/jwakely/build/x86_64-unknown-netbsd5.1/libstdc++-v3/include/mutex:815:
multiple definition of `void std::call_once<void (std::thread::*)(),
std::reference_wrapper<std::thread> >(std::once_flag&, void
(std::thread::*&&)(),
std::reference_wrapper<std::thread>&&)::{lambda()#1}::_FUN()'
.libs/compatibility-thread-c++0x.o:/home/jwakely/build/x86_64-unknown-netbsd5.1/libstdc++-v3/include/mutex:815:
first defined here

I'll try to reproduce this on other platforms by using --disable-tls, so that
code path is taken.

[Bug bootstrap/53675] [4.8 Regression] bootstrap fails on netbsd5.1 with multiple definitions of libstdc++ symbols

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53675

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-06-16
            Summary|[4.8 Regression] bootstrap  |[4.8 Regression] bootstrap
                   |fails on netbsd5.1 due to   |fails on netbsd5.1 with
                   |unsupported dwarf4 info     |multiple definitions of
                   |                            |libstdc++ symbols
     Ever Confirmed|0                           |1

[Bug bootstrap/53675] [4.8 Regression] bootstrap fails on non-TLS targets with multiple definitions of libstdc++ symbols

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53675

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|x86_64-unknown-netbsd5.1    |
               Host|x86_64-unknown-netbsd5.1    |
            Summary|[4.8 Regression] bootstrap  |[4.8 Regression] bootstrap
                   |fails on netbsd5.1 with     |fails on non-TLS targets
                   |multiple definitions of     |with multiple definitions
                   |libstdc++ symbols           |of libstdc++ symbols
              Build|x86_64-unknown-netbsd5.1    |

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-06-18 17:36:41 UTC ---
Reproduced on x86_64-unknown-linux-gnu (using gcc20 in the compile farm)
configured with --disable-tls, with binutils version:
GNU ld (GNU Binutils for Debian) 2.20.1-system.20100303


/usr/bin/ld: Dwarf Error: found dwarf version '49668', this reader only handles
version 2 and 3 information.
../../src/debug/c++11/.libs/libc++11convenience.a(future.o): In function
`_ZZSt9call_onceIMSt6threadFvvEJSt17reference_wrapperIS0_EEEvRSt9once_flagOT_DpOT0_ENKUlvE_cvPFvvEEv':
future.cc:(.text._ZZSt9call_onceIMSt6threadFvvEISt17reference_wrapperIS0_EEEvRSt9once_flagOT_DpOT0_ENKUlvE_cvPFvvEEv+0x0):
multiple definition of
`_ZZSt9call_onceIMSt6threadFvvEISt17reference_wrapperIS0_EEEvRSt9once_flagOT_DpOT0_ENKUlvE_cvPFvvEEv'
/usr/bin/ld: Dwarf Error: found dwarf version '17193', this reader only handles
version 2 and 3 information.
.libs/compatibility-thread-c++0x.o:compatibility-thread-c++0x.cc:(.text._ZZSt9call_onceIMSt6threadFvvEISt17reference_wrapperIS0_EEEvRSt9once_flagOT_DpOT0_ENKUlvE_cvPFvvEEv+0x0):
first defined here

Full configure command:

/home/jwakely/src/gcc/configure --prefix=/home/jwakely/gcc/4.x
--with-system-zlib --with-gnu-ld --with-gnu-as --disable-libitm
--disable-libquadmath --disable-libmudflap --enable-libstdcxx-debug
--enable-languages=c,c++ --disable-bootstrap --disable-tls

[Bug bootstrap/53675] [4.8 Regression] bootstrap fails on non-TLS targets with multiple definitions of libstdc++ symbols

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53675

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at gcc dot gnu.org

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-06-18 20:17:10 UTC ---
git bisect shows it was caused by the patch for PR 53137

f899a730d4f41b6a20b5508059a450f3a9347316 is the first bad commit
commit f899a730d4f41b6a20b5508059a450f3a9347316
Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Fri Jun 1 16:55:17 2012 +0000

        PR c++/53137
        * pt.c (instantiate_class_template_1): Set LAMBDA_EXPR_THIS_CAPTURE.
        (instantiate_decl): Don't push_to_top_level for local class methods.
        (instantiate_class_template_1): Or for local classes.

    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@188117
138bc75d-0d04-0410-961f-82ee72b054a4

[Bug bootstrap/53675] [4.8 Regression] bootstrap fails on non-TLS targets with multiple definitions of libstdc++ symbols

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53675

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

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

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-07-03 20:55:25 UTC ---
fixed, probably by Jason's patch for PR 53821

*** This bug has been marked as a duplicate of bug 53821 ***

[Bug bootstrap/53675] [4.8 Regression] bootstrap fails on non-TLS targets with multiple definitions of libstdc++ symbols

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53675

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-07-04 09:22:58 UTC ---
I'm still seeing junk dwarf info:

/usr/bin/ld: Dwarf Error: found dwarf version '0', this reader only handles
version 2 and 3 information.
2.cc:(.text._Z6test01v+0x73): undefined reference to
`std::chrono::steady_clock::now()'
/usr/bin/ld: Dwarf Error: found dwarf version '12425', this reader only handles
version 2 and 3 information.
2.cc:(.text._Z6test01v+0xe1): undefined reference to
`std::chrono::steady_clock::now()'
collect2: error: ld returned 1 exit status

Will investigate ...