Now mingw-w64 C++ compiler defines __USE_MINGW_ANSI_STDIO to 1, we
have to follow it as well. We hope that mingw version of stdio
function behaves like Linux ones. We have not tested them thoroughly
yet. pthread for windows defines its own HAVE_STRUCT_TIMESPEC macro.
To avoid warning, we rename our version of it as
HAVE_A2_STRUCT_TIMESPEC.
We replaced most of std::cerr with global::cerr. windows.h is now
included from common.h. Before including it, we define WINVER. We
renamed some variable name because some macros in windows.h collide
with them.
In MinGW32 build, global::cout is WinConsoleFile. When outputing to
console, it uses WriteConsoleW, so Unicode characters are written.
Fixed memory leak in WChar<->MultiByte conversion functions. The
portion of code which uses std::cout is rewritten to use global::cout.
Tatsuhiro Tsujikawa