[Bug c++/34309] New: template variable not getting marked as weak when defined in pch

[rbuergel at web dot de]

this is an "enhanced" version of bug 24389.

The bug is still present, if the template variable is defined in a precompiled
header.

Testcase:

== header.h ==

#include <tr1/unordered_map>


== 1.cpp ==

#include "header.h"


== 2.cpp ==

#include "header.h"
int main(){}



compiling them:
g++ -c header.h
g++ 1.cpp 2.cpp

...gives us the known error:
/tmp/ccLfG2oZ.o:(.bss+0x0): multiple definition of `std::tr1::(anonymous
namespace)::ignore'
/tmp/ccqbV1zU.o:(.bss+0x0): first defined here
/tmp/ccLfG2oZ.o:(.bss+0x1): multiple definition of
`std::tr1::placeholders::(anonymous namespace)::_1'
/tmp/ccqbV1zU.o:(.bss+0x1): first defined here
/tmp/ccLfG2oZ.o:(.bss+0x2): multiple definition of
`std::tr1::placeholders::(anonymous namespace)::_2'
/tmp/ccqbV1zU.o:(.bss+0x2): first defined here
/tmp/ccLfG2oZ.o:(.bss+0x3): multiple definition of
`std::tr1::placeholders::(anonymous namespace)::_3'
/tmp/ccqbV1zU.o:(.bss+0x3): first defined here
/tmp/ccLfG2oZ.o:(.bss+0x4): multiple definition of
`std::tr1::placeholders::(anonymous namespace)::_4'
/tmp/ccqbV1zU.o:(.bss+0x4): first defined here
/tmp/ccLfG2oZ.o:(.bss+0x5): multiple definition of
`std::tr1::placeholders::(anonymous namespace)::_5'
/tmp/ccqbV1zU.o:(.bss+0x5): first defined here
/tmp/ccLfG2oZ.o:(.bss+0x6): multiple definition of
`std::tr1::placeholders::(anonymous namespace)::_6'
/tmp/ccqbV1zU.o:(.bss+0x6): first defined here
/tmp/ccLfG2oZ.o:(.bss+0x7): multiple definition of
`std::tr1::placeholders::(anonymous namespace)::_7'
/tmp/ccqbV1zU.o:(.bss+0x7): first defined here
/tmp/ccLfG2oZ.o:(.bss+0x8): multiple definition of
`std::tr1::placeholders::(anonymous namespace)::_8'
/tmp/ccqbV1zU.o:(.bss+0x8): first defined here
/tmp/ccLfG2oZ.o:(.bss+0x9): multiple definition of
`std::tr1::placeholders::(anonymous namespace)::_9'
/tmp/ccqbV1zU.o:(.bss+0x9): first defined here
/tmp/ccLfG2oZ.o:(.bss+0xa): multiple definition of
`std::tr1::placeholders::(anonymous namespace)::_10'
/tmp/ccqbV1zU.o:(.bss+0xa): first defined here


It occurs with gcc-4.1 (gcc version 4.1.3 20071126 (prerelease)), but is fixed
at least in 4.2.1


-- 
           Summary: template variable not getting marked as weak when
                    defined in pch
           Product: gcc
           Version: 4.1.3
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rbuergel at web dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34309