[boost] [iostreams] patch for wide_streams.hpp for HP-UX

From: Boris Gubenko (Boris.Gubenko_at_[hidden])
Date: 2007-02-24 22:51:14

On HP-UX/aCC6, iostreams library test code_converter_test fails to link.

This is caused by a (home-added) feature of Rogue Wave library on this
platform which is that for codecvt to be instantiated on anything but
types listed in Table 51 -- Locale Category Facets in 22.1.1.1.1 - Type
locale::category, the program must be compiled with _HP_INSTANTIATE_STD2_VL
macro defined.

Here is small reproducer:

x.cpp
-----
#include <locale>

struct S {};

int main()
{
  std::codecvt_byname<wchar_t,char,S>* x =
    new std::codecvt_byname<wchar_t,char,S>("");
}

bash-3.00$ aCC x.cpp
ld: Unsatisfied symbol "virtual table of std::codecvt<wchar_t,char,S>" in
file x.o
ld: Unsatisfied symbol "type info of std::codecvt<wchar_t,char,S>" in file
x.o
2 errors.
bash-3.00$ aCC x.cpp -D_HP_INSTANTIATE_STD2_VL
bash-3.00$

Attached patch modifies boost/iostreams/detail/config/wide_streams.hpp
to define _HP_INSTANTIATE_STD2_VL macro for HP-UX/aCC.

I verified, that with this fix, iostreams library test code_converter_test
pass. I also verified, that the fix does not cause any regressions.

Please, apply this patch. If the patch is applied only to HEAD, please,
mark iostreams library test code_converter_test expected failure for
toolset "acc".

Thanks,
  Boris

Index: wide_streams.hpp
===================================================================
RCS file: /cvsroot/boost/boost/boost/iostreams/detail/config/wide_streams.hpp,v
retrieving revision 1.7
diff -r1.7 wide_streams.hpp
20a21,24
> #if defined(__HP_aCC) && !defined(_HP_INSTANTIATE_STD2_VL)
> # define _HP_INSTANTIATE_STD2_VL
> #endif
>