[boost] missing stdio.h include in thread lib

From: François Dumont (francois.cppdevs_at_[hidden])
Date: 2005-08-23 14:19:48

Hello

    I am submitting once again this patch for the thread library as the 
issue still exist with 1.33.0. When building boost with msvc-stlport 
toolset the _snprintf function used at read_write_mutex.cpp:151 is 
undefined as stdio.h has not been included next to tchar.h include at 
line 38.

    In order to have this patch apply this time I have study why 
_snprintf _is_ defined when using msvc toolset. The conclusion is that 
the definition comes from the <utility> include in 
boost/config/select_stdlib_config.hpp which is used to guess what is the 
std lib. In VC6 utility header include a lot of headers indirectly like 
cstring, cwchar, xstddef and cstdio which give _snprintf. The STLport 
utility try to limit the includes, maybe it shouldn't ;-)

    For your info I discovered an other issue, some guy from boost will 
have perhaps to work on it. I have only check it with VC6, don't know if 
it is reproductible with .NET 2002 or 2003. Even if you set your INCLUDE 
env variable to use the latest PSDK rather than the one integrated in 
VC6 you are still include of windows.h from boost during build process 
are still referencing the VC6 windows.h rather than the one of the 
latest SDK. I thought it was coming from the #include "windows.h" that 
exists in many VC6 headers but it is not the case.

    Bests


*** read_write_mutex.cpp.orig	Tue Aug 23 07:46:00 2005
--- read_write_mutex.cpp	Tue Aug 23 19:02:08 2005
***************
*** 36,41 ****
--- 36,42 ----
  #ifdef BOOST_HAS_WINTHREADS
  #   include <windows.h>
  #   include <tchar.h>
+ #   include <stdio.h>
  
  #   if !((_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400))
          inline bool IsDebuggerPresent(void)