ceph/src/boost/libs/spirit/include/boost/spirit/home/classic/core/config.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2003 Joel de Guzman
   3     http://spirit.sourceforge.net/
   4
   5   Distributed under the Boost Software License, Version 1.0. (See accompanying
   6   file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 =============================================================================*/
   8 #if !defined(BOOST_SPIRIT_CONFIG_HPP)
   9 #define BOOST_SPIRIT_CONFIG_HPP
  10
  11 #include <boost/config.hpp>
  12
  13 ///////////////////////////////////////////////////////////////////////////////
  14 //
  15 //  Compiler check:
  16 //
  17 //  Historically, Spirit supported a lot of compilers, including (to some
  18 //  extent) poorly conforming compilers such as VC6. Spirit v1.6.x will be
  19 //  the last release that will support older poorly conforming compilers.
  20 //  Starting from Spirit v1.8.0, ill conforming compilers will not be
  21 //  supported. If you are still using one of these older compilers, you can
  22 //  still use Spirit v1.6.x.
  23 //
  24 //  The reason why Spirit v1.6.x worked on old non-conforming compilers is
  25 //  that the authors laboriously took the trouble of searching for
  26 //  workarounds to make these compilers happy. The process takes a lot of
  27 //  time and energy, especially when one encounters the dreaded ICE or
  28 //  "Internal Compiler Error". Sometimes searching for a single workaround
  29 //  takes days or even weeks. Sometimes, there are no known workarounds. This
  30 //  stifles progress a lot. And, as the library gets more progressive and
  31 //  takes on more advanced C++ techniques, the difficulty is escalated to
  32 //  even new heights.
  33 //
  34 //  Spirit v1.6.x will still be supported. Maintenance and bug fixes will
  35 //  still be applied. There will still be active development for the back-
  36 //  porting of new features introduced in Spirit v1.8.0 (and Spirit 1.9.0)
  37 //  to lesser able compilers; hopefully, fueled by contributions from the
  38 //  community. For instance, there is already a working AST tree back-port
  39 //  for VC6 and VC7 by Peder Holt.
  40 //
  41 //  If you got here somehow, your compiler is known to be poorly conforming
  42 //  WRT ANSI/ISO C++ standard. Library implementers get a bad reputation when
  43 //  someone attempts to compile the code on a non-conforming compiler. She'll
  44 //  be confronted with tons of compiler errors when she tries to compile the
  45 //  library. Such errors will somehow make less informed users conclude that
  46 //  the code is poorly written. It's better for the user to see a message
  47 //  "sorry, this code has not been ported to your compiler yet", than to see
  48 //  pages and pages of compiler error messages.
  49 //
  50 /////////////////////////////////////////////////////////////////////////////////
  51 #if     (defined(BOOST_MSVC) && (BOOST_MSVC < 1310))                            \
  52     ||  (defined(__BORLANDC__) && (__BORLANDC__ <= 0x570))                      \
  53     ||  (defined(__GNUC__) && (__GNUC__ < 3))                                   \
  54     ||  (defined(__GNUC__) && (__GNUC__ == 3) && (__GNUC_MINOR__ < 1))
  55 # error "Compiler not supported. See note in <boost/spirit/core/config.hpp>"
  56 #else
  57 // Pass... Compiler supported.
  58 #endif
  59
  60 #endif
  61
  62