Re: [boost] anonymous namespaces and Intel C++ 8

From: Matthias Troyer (troyer_at_[hidden])
Date: 2003-12-18 16:02:25

On Dec 16, 2003, at 3:30 PM, Peter Dimov wrote:

> Matthias Troyer wrote:
>> Dear Boosters,
>>
>> In trying to get our boost-based codes to compile with Intel C++
>> version 8 I realized one important restriction of that compiler with
>> anonymous namespaces (used in boost for the placeholder symbols _1,
>> _2,... ). With Intel C++ version 8 these anonymous namespace symbols
>> give multiple definition errors at link time if they occur in two
>> different object files with the same name (even if one of these object
>> files is part of a static library (.a file). The only solution I could
>> find is to rename all my source files that clashed with file names
>> inside libraries. Does anybody know a better workaround?
>
> Not for the general problem, but for bind, look at the two workaround 
> paths
> in boost/bind/placeholders.hpp, maybe one of them will work for you.

I realized that it has nothing to do with boost bind but is a deeper 
problem caused by using virtual functions, anonymous namespaces,  
including <iterator>  and having an object file with the same name as 
that in an archive. I have attached the simplest example I could find 
that shows the behavior:

make
/opt/intel/compiler80/bin/icc -c -o test.o test.C
/opt/intel/compiler80/bin/icc -c -o lib/test.o lib/test.C
ar ruc libtest.a lib/test.o
/opt/intel/compiler80/bin/icc -o test test.o -L. -ltest
./libtest.a(test.o)(.bss+0x0): multiple definition of `(anonymous 
namespace)::y'
test.o(.bss+0x0): first defined here
make: *** [test] Error 1

Does anybody know what the address at Intel is where I can report this 
bug?

Matthias