gcc48: to_string not a member of std

[Thomas Klausner <wiz%NetBSD.org@localhost>]

Hi!

I wanted to compile some software using to_string on NetBSD with gcc-4.8.
It failed: "error: 'to_string' is not a member of 'std'"

After some guessing I found that bits/basic_string.h has:

#if ((__cplusplus >= 201103L) && defined(_GLIBCXX_USE_C99) && 
!defined(_GLIBCXX_HAVE_BROKEN_VSWPRINTF))

But the installed /usr/include/g++/bits/x86_64/c++config.h has:
/* #undef _GLIBCXX_USE_C99 */

When I change that to
#define _GLIBCXX_USE_C99 1

I can compile software using to_string.

Running it is another matter:
terminate called after throwing an instance of 'std::runtime_error'
what():  locale::facet::_S_create_c_locale name not valid

but unsetting LC_* "fixes" that.

I think that's progress. Does anyone see a reason not to define
_GLIBCXX_USE_C99?
 Thomas