2011-10-14 Jonathan Yong <jon_y@users.sourceforge.net>
* configure.host: Use config/os/mingw32-w64 instead of
config/os/mingw32 if vendor key is "w64".
* config/os/mingw32-w64: Duplicate from config/os/mingw32.
* config/os/mingw32-w64/os_defines.h: Enable
_GLIBCXX_FULLY_DYNAMIC_STRING if undefined.
* acinclude.m4: Set fully-dynamic-string to 1 when enabled,
0 when disabled or undefined if unset by user.
* include/bits/basic_string.h: Check if
_GLIBCXX_FULLY_DYNAMIC_STRING is set to 0 instead of undefined.
include/bits/basic_string.tcc: Likewise.
* configure: Regenerated.
* config.h.in: Likewise.
From-SVN: r179961
