[patch] compile errors property_tree std::wstring

[Jan-Hein Bührman <buhrman@…>]

When compiling today's development trunk of boost, I see the following errors:

[snip]
gcc.compile.c++ bin.v2/libs/graph/build/gcc-3.4.4/release/threading-multi/graphml.o
In file included from ./boost/property_tree/ptree.hpp:15,
                 from ./boost/property_tree/detail/file_parser_error.hpp:13,
                 from ./boost/property_tree/detail/xml_parser_error.hpp:13,
                 from ./boost/property_tree/detail/xml_parser_utils.hpp:14,
                 from ./boost/graph/graphml.hpp:26,
                 from libs\graph\src\graphml.cpp:17:
./boost/property_tree/ptree_fwd.hpp:92: error: `wstring' is not a member of `std'
[snip]
In file included from ./boost/property_tree/ptree.hpp:16,
                 from ./boost/property_tree/detail/file_parser_error.hpp:13,
                 from ./boost/property_tree/detail/xml_parser_error.hpp:13,
                 from ./boost/property_tree/detail/xml_parser_utils.hpp:14,
                 from ./boost/graph/graphml.hpp:26,
                 from libs\graph\src\graphml.cpp:17:
./boost/property_tree/string_path.hpp:60: error: expected unqualified-id before '&' token
[snip]

It seems that a reference to std::wstring is not protected by the appropriate boost feature flag.

bjam was generated in the follwing way:

$ ./bootstrap.sh --prefix=$HOME/local --exec-prefix=$HOME/local/${MACHTYPE=i686-pc-cygwin}

It is compiled on Windows XP machine, under a recent update of Cygwin.

$ g++ --version
g++ (GCC) 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Attached svn diff seems to solve the compilation errors.

[Sebastian Redl]

(In [61604]) Fix property tree for systems without wstring. Fixes bug 4145