[Bug c++/42033] New: libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[Bug c++/42033] New: libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[hubicka at gcc dot gnu dot org]

Hi,
compiling tramp3d with -fwhole-program leads to:
/home/jh/gcc-install/lib/gcc/x86_64-unknown-linux-gnu/4.5.0/../../../../lib64/libstdc++.a(sstream-inst.o):
In function `std::basic_stringbuf<char, std::char_traits<char>,
std::allocator<char> >::str() const':
/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:129:
undefined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)'
/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:127:
undefined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)'
/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:129:
undefined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)'
/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:127:
undefined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)'
/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:129:
undefined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)'
/home/jh/gcc-install/lib/gcc/x86_64-unknown-linux-gnu/4.5.0/../../../../lib64/libstdc++.a(sstream-inst.o):/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:127:
more undefined references to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)' follow

I suppose this is because normally tramp3d exports the function as comdat and
as a result of -fwhole-program we bring it local (since we know address is not
taken and making it local enable more optimization) while libstdc++ reference
the function but does not provide COMDAT version of it.

I think this is not valid, or is this C++ ABI feature?


-- 
           Summary: libstdc++ seems to miss std::basic_string<char,
                    std::char_traits<char>, std::allocator<char>
                    >::basic_string<char*>(char*, char*,
                    std::allocator<char> const&)
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hubicka at gcc dot gnu dot org
  GCC host triplet: x86_64-linux
GCC target triplet: x86_64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42033

[Bug c++/42033] libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[jason at gcc dot gnu dot org]

------- Comment #1 from jason at gcc dot gnu dot org  2009-11-13 20:08 -------
libstdc++ does define that function, in string-inst.cc.  And it shouldn't be
defined anywhere else.  I don't know what would be causing that error.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42033

[Bug c++/42033] libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[paolo dot carlini at oracle dot com]

------- Comment #2 from paolo dot carlini at oracle dot com  2009-11-13 20:37 -------
It's normally exported from the *.so, just grep it:

00000000000a90d0 W std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42033

[Bug c++/42033] libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[hubicka at ucw dot cz]

------- Comment #3 from hubicka at ucw dot cz  2009-11-13 21:01 -------
Subject: Re:  libstdc++ seems to miss std::basic_string<char,
std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*,
char*, std::allocator<char> const&)

This fails with --static only:

jh@gcc17:~/gcc-install/lib64$ nm -C libstdc++.so | less
jh@gcc17:~/gcc-install/lib64$ fgrep 'std::basic_string<char,
std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*,
char*, std::allocator<char> const&)'
jh@gcc17:~/gcc-install/lib64$ nm -C libstdc++.so | fgrep
'std::basic_string<char, std::char_traits<char>, std::allocator<char>
>::basic_string<char*>(char*, char*, std::allocator<char> const&)'
00000000000a3bf0 W std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)
00000000000a3a50 W std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)
jh@gcc17:~/gcc-install/lib64$ nm -C libstdc++.a | fgrep
'std::basic_string<char, std::char_traits<char>, std::allocator<char>
>::basic_string<char*>(char*, char*, std::allocator<char> const&)'
                 U std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)
                 U std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)
0000000000000000 W std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)
0000000000000000 W std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)


jh@gcc17:~/trunk/build5$ ~/gcc-install/bin/g++ a.o --static
/home/jh/gcc-install/lib/gcc/x86_64-unknown-linux-gnu/4.5.0/../../../../lib64/libstdc++.a(sstream-inst.o):
In function `std::basic_stringbuf<char, std::char_traits<char>,
std::allocator<char> >::str() const':
/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:129:
undefined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)'
/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:127:
undefined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)'
/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:129:
undefined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)'
/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:127:
undefined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)'
/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:129:
undefined reference to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)'
/home/jh/gcc-install/lib/gcc/x86_64-unknown-linux-gnu/4.5.0/../../../../lib64/libstdc++.a(sstream-inst.o):/home/jh/trunk/build5/x86_64-unknown-linux-gnu/libstdc++-v3/include/sstream:127:
more undefined references to `std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)' follow
collect2: ld returned 1 exit status
jh@gcc17:~/trunk/build5$ ~/gcc-install/bin/g++ a.o
jh@gcc17:~/trunk/build5$
LD_LIBRARY_PATH=/home//jh/gcc-install/lib64/:$LD_LIBRARY_PATH ./a.out
Usage: tramp3d-v4
  --help|-h|-?        show this command line help
  --num-iter|-n       number of iterations to perform [Inf]
  --end-t|-t          time to stop simulation [Inf]
  --cfl               cfl number [0.6]
  --dt                constant timestep, used with cfl number [off]
  --min-dt            minimum timestep allowed
  --max-dt            maximum timestep allowed
  --blocks nx ny nz   processor setup [automatic]
  --cartvis nr av     artificial viscosity NR AV [off]
  --eos n             choose eos
  --rhomin rho        density floor [off]
  --blocking-expressions  set blocking expressions [off]
  --domain x y z      computational vertex domain [64x64x64]

A particularly benchmarky and checky command-line includes
both artificial viscosity and density minimum via f.i.
  ./tramp3d-v4 --cartvis 1.0 0.0 --rhomin 1e-8
(reverse-i-search)`fg': fg
jh@gcc17:~/trunk/build5$ nm -C a.o | fgrep 'std::basic_string<char,
std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*,
char*, std::allocator<char> const&)'
0000000000000000 t std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char>
const&)
jh@gcc17:~/trunk/build5$

Honza


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42033

[Bug c++/42033] libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[paolo dot carlini at oracle dot com]

------- Comment #4 from paolo dot carlini at oracle dot com  2009-11-13 21:10 -------
I see. Seems a compiler problem indeed, because, as Jason mentioned, the
template is explicitly instantiated in string-inst.cc and marked to be exported
in the linker script for the *.so. I have no idea what libstdc++ could do to
fix this...


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42033

[Bug c++/42033] libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[hubicka at ucw dot cz]

------- Comment #5 from hubicka at ucw dot cz  2009-11-13 21:16 -------
Subject: Re:  libstdc++ seems to miss std::basic_string<char,
std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*,
char*, std::allocator<char> const&)

> I see. Seems a compiler problem indeed, because, as Jason mentioned, the
> template is explicitly instantiated in string-inst.cc and marked to be exported
> in the linker script for the *.so. I have no idea what libstdc++ could do to
> fix this...
I am confused why I get link error given that even my *.a exports the
symbol...

Honza


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42033

[Bug c++/42033] libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[rguenth at gcc dot gnu dot org]

------- Comment #7 from rguenth at gcc dot gnu dot org  2009-11-13 21:59 -------
*** Bug 42036 has been marked as a duplicate of this bug. ***


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42033

[Bug c++/42033] libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2009-11-13 21:58 -------
*** Bug 42035 has been marked as a duplicate of this bug. ***


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42033

[Bug c++/42033] libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[jason at redhat dot com]

------- Comment #8 from jason at redhat dot com  2009-11-13 23:18 -------
Subject: Re:  libstdc++ seems to miss std::basic_string<char,
 std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*,
 char*, std::allocator<char> const&)

On 11/13/2009 04:16 PM, hubicka at ucw dot cz wrote:
> I am confused why I get link error given that even my *.a exports the
> symbol...

Yeah, sounds more like a linker issue.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42033

[Bug c++/42033] libstdc++ seems to miss std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*>(char*, char*, std::allocator<char> const&)

[paolo dot carlini at oracle dot com]

------- Comment #9 from paolo dot carlini at oracle dot com  2010-09-13 15:22 -------
What's going on with this? Is there something I can do to help resolving it for
good?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42033