git.m6w6.name Git - awesomized/libmemcached/blob - m4/pandora_stl_hash.m4

   1 # Copyright (C) 2008 Sun Microsystems, Inc.
   2 # This file is free software; Sun Microsystems, Inc.
   3 # gives unlimited permission to copy and/or distribute it,
   4 # with or without modifications, as long as this notice is preserved.
   5
   6 # We check two things: where the include file is for unordered_map, and
   7 # what namespace unordered_map lives in within that include file.  We
   8 # include AC_COMPILE_IFELSE for all the combinations we've seen in the
   9 # wild.  We define HAVE_UNORDERED_MAP and HAVE_UNORDERED_SET if we have
  10 # them, UNORDERED_MAP_H and UNORDERED_SET_H to their location and
  11 # UNORDERED_NAMESPACE to be the namespace unordered_map is defined in.
  12
  13 AC_DEFUN([PANDORA_CXX_STL_UNORDERED],[
  14   save_CXXFLAGS="${CXXFLAGS}"
  15   CXXFLAGS="${AM_CXXFLAGS} ${CXXFLAGS}"
  16   AC_LANG_PUSH(C++)
  17   AC_CACHE_CHECK([for STL unordered_map],
  18     [pandora_cv_stl_unordered],[
  19       AC_COMPILE_IFELSE(
  20         [AC_LANG_PROGRAM([[#include <unordered_map>]],
  21                          [[std::unordered_map<int, int> t]])],
  22         [pandora_cv_stl_unordered="yes"],
  23         [pandora_cv_stl_unordered="no"])])
  24
  25   AS_IF([test "x${pandora_cv_stl_unordered}" != "xyes"],[
  26     AC_CACHE_CHECK([for tr1 unordered_map],
  27       [pandora_cv_tr1_unordered],[
  28         AC_COMPILE_IFELSE(
  29           [AC_LANG_PROGRAM([[
  30 /* We put in this define because of a YACC symbol clash in Drizzle.
  31    Seriously... I cannot believe the GCC guys defined a piece of the internals
  32    of this named IF - and I can't believe that YACC generates a token define
  33    called IF. Really?
  34 */
  35 #define IF 21;
  36 #include <tr1/unordered_map>
  37             ]],[[
  38 std::tr1::unordered_map<int, int> t
  39           ]])],
  40           [pandora_cv_tr1_unordered="yes"],
  41           [pandora_cv_tr1_unordered="no"])])
  42   ])
  43
  44   AS_IF([test "x${pandora_cv_stl_unordered}" != "xyes" -a "x${pandora_cv_tr1_unordered}" != "xyes"],[
  45     AC_CACHE_CHECK([for boost unordered_map],
  46       [pandora_cv_boost_unordered],[
  47         AC_COMPILE_IFELSE(
  48           [AC_LANG_PROGRAM([[#include <boost/unordered_map.hpp>]],
  49                            [[boost::unordered_map<int, int> t]])],
  50           [pandora_cv_boost_unordered="yes"],
  51           [pandora_cv_boost_unordered="no"])])
  52   ])
  53
  54   CXXFLAGS="${save_CXXFLAGS}"
  55   AC_LANG_POP()
  56
  57   AS_IF([test "x${pandora_cv_stl_unordered}" = "xyes"],[
  58     AC_DEFINE(HAVE_STD_UNORDERED_MAP, 1,
  59               [if the compiler has std::unordered_map])
  60     AC_DEFINE(HAVE_STD_UNORDERED_SET, 1,
  61               [if the compiler has std::unordered_set])
  62     pandora_has_unordered=yes
  63   ])
  64   AS_IF([test "x${pandora_cv_tr1_unordered}" = "xyes"],[
  65     AC_DEFINE(HAVE_TR1_UNORDERED_MAP, 1,
  66               [if the compiler has std::tr1::unordered_map])
  67     AC_DEFINE(HAVE_TR1_UNORDERED_SET, 1,
  68               [if the compiler has std::tr1::unordered_set])
  69     pandora_has_unordered=yes
  70   ])
  71   AS_IF([test "x${pandora_cv_boost_unordered}" = "xyes"],[
  72     AC_DEFINE(HAVE_BOOST_UNORDERED_MAP, 1,
  73               [if the compiler has boost::unordered_map])
  74     AC_DEFINE(HAVE_BOOST_UNORDERED_SET, 1,
  75               [if the compiler has boost::unordered_set])
  76     pandora_has_unordered=yes
  77   ])
  78
  79   AS_IF([test "x${pandora_has_unordered}" != "xyes"],[
  80     AC_MSG_WARN([could not find an STL unordered_map])
  81   ])
  82 ])
  83
  84 AC_DEFUN([PANDORA_HAVE_CXX_UNORDERED],[
  85   AC_REQUIRE([PANDORA_CXX_STL_UNORDERED])
  86 ])
  87
  88 AC_DEFUN([PANDORA_REQUIRE_CXX_UNORDERED],[
  89   AC_REQUIRE([PANDORA_HAVE_CXX_UNORDERED])
  90   AS_IF([test "x${pandora_has_unordered}" != "xyes"],[
  91     AC_MSG_ERROR([An STL compliant unordered_map is required for ${PACKAGE}.
  92     Implementations can be found in Recent versions of gcc and in boost])
  93   ])
  94 ])