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Only include <utility> when we absolutely have to as it's not so lightweight in C++11. See https://github.com/boostorg/config/pull/40

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jzmaddock
2014-10-02 18:52:03 +01:00
parent d3c1db5436
commit d978d31117
1 changed files with 13 additions and 7 deletions
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20
include/boost/config/select_stdlib_config.hpp
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@ -28,13 +28,19 @@
#else
// If our std lib was not some version of STLport, then include <utility> as it is about
// the smallest of the std lib headers that includes real C++ stuff. (Some std libs do not
// include their C++-related macros in <cstddef> so this additional include makes sure
// we get those definitions)
// (again do not rely on this header being included since users can short-circuit this
// header if they know whose std lib they are using.)
#include <boost/config/no_tr1/utility.hpp>
// If our std lib was not some version of STLport, and has not otherwise
// been detected, then include <utility> as it is about
// the smallest of the std lib headers that includes real C++ stuff.
// Some std libs do not include their C++-related macros in <cstddef>
// so this additional include makes sure we get those definitions.
// Note: do not rely on this header being included since users can short-circuit this
// #include if they know whose std lib they are using.
#if !defined(__LIBCOMO__) && !defined(__STD_RWCOMPILER_H__) && !defined(_RWSTD_VER)\
&& !defined(_LIBCPP_VERSION) && !defined(__GLIBCPP__) && !defined(__GLIBCXX__)\
&& !defined(__STL_CONFIG_H) && !defined(__MSL_CPP__) && !defined(__IBMCPP__)\
&& !defined(MSIPL_COMPILE_H) && !defined(_YVALS) && !defined(_CPPLIB_VER)
#include <utility>
#endif
#if defined(__LIBCOMO__)
// Comeau STL: