From 8854d5e66ef824edac1e6da24abcdbbc7ad129e4 Mon Sep 17 00:00:00 2001
From: David Deakins <DavidDeakins@gmail.com>
Date: Mon, 6 Apr 2009 21:25:18 +0000
Subject: [PATCH] Have config/select_stdlib_config.hpp and
 config/stdlib/stlport.hpp use <cstddef> instead of <utility> to determine
 which standard library is in use.  For std lib implementations that rely on
 Boost components like TypeTraits, Bind, Function, or SmartPtr, this helps to
 avoid circular header dependency issues, since <cstddef> is much less likely
 to pull in Boost libraries than <utility>.

In get_pointer.hpp, switched to using <boost/config/no_tr1/memory.hpp> instead of using <memory> directly.  As above, this helps avoid circular header dependency issues in Boost-supplemented std libs (specifically it avoids issues when <memory> pulls in pieces of Boost.SmartPtr).

These two changes were made in response to testing done with STLport 5.2.1 using the _STLP_USE_BOOST_SUPPORT option.

[SVN r52221]
---
 include/boost/config/select_stdlib_config.hpp | 6 +++---
 include/boost/config/stdlib/stlport.hpp       | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/boost/config/select_stdlib_config.hpp b/include/boost/config/select_stdlib_config.hpp
index 13e5e4ce..40a58fc2 100644
--- a/include/boost/config/select_stdlib_config.hpp
+++ b/include/boost/config/select_stdlib_config.hpp
@@ -12,12 +12,12 @@
 // locate which std lib we are using and define BOOST_STDLIB_CONFIG as needed:
 
 // we need to include a std lib header here in order to detect which
-// library is in use, use <utility> as it's about the smallest
-// of the std lib headers - do not rely on this header being included -
+// library is in use, use <cstddef> as it's one of the smaller std lib headers 
+// - do not rely on this header being included -
 // users can short-circuit this header if they know whose std lib
 // they are using.
 
-#include <boost/config/no_tr1/utility.hpp>
+#include <cstddef>
 
 #if defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)
 // STLPort library; this _must_ come first, otherwise since
diff --git a/include/boost/config/stdlib/stlport.hpp b/include/boost/config/stdlib/stlport.hpp
index 8d0677ea..82e4cff5 100644
--- a/include/boost/config/stdlib/stlport.hpp
+++ b/include/boost/config/stdlib/stlport.hpp
@@ -10,7 +10,7 @@
 //  STLPort standard library config:
 
 #if !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
-#  include <boost/config/no_tr1/utility.hpp>
+#  include <cstddef>
 #  if !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
 #      error "This is not STLPort!"
 #  endif