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

   1 # We check two things: where the include file is for unordered_map, and
   2 # what namespace unordered_map lives in within that include file.  We
   3 # include AC_COMPILE_IFELSE for all the combinations we've seen in the
   4 # wild.  We define HAVE_UNORDERED_MAP and HAVE_UNORDERED_SET if we have
   5 # them, UNORDERED_MAP_H and UNORDERED_SET_H to their location and
   6 # UNORDERED_NAMESPACE to be the namespace unordered_map is defined in.
   7
   8 AC_DEFUN([PANDORA_CXX_STL_UNORDERED],[
   9   save_CXXFLAGS="${CXXFLAGS}"
  10   CXXFLAGS="${AM_CXXFLAGS} ${CXXFLAGS}"
  11   AC_LANG_PUSH(C++)
  12   AC_CACHE_CHECK([for STL unordered_map],
  13     [pandora_cv_stl_unordered],[
  14       AC_COMPILE_IFELSE(
  15         [AC_LANG_PROGRAM([[#include <unordered_map>]],
  16                          [[std::unordered_map<int, int> t]])],
  17         [pandora_cv_stl_unordered="yes"],
  18         [pandora_cv_stl_unordered="no"])])
  19
  20   AS_IF([test "x${pandora_cv_stl_unordered}" != "xyes"],[
  21     AC_CACHE_CHECK([for tr1 unordered_map],
  22       [pandora_cv_tr1_unordered],[
  23         AC_COMPILE_IFELSE(
  24           [AC_LANG_PROGRAM([[
  25 /* We put in this define because of a YACC symbol clash in Drizzle.
  26    Seriously... I cannot believe the GCC guys defined a piece of the internals
  27    of this named IF - and I can't believe that YACC generates a token define
  28    called IF. Really?
  29 */
  30 #define IF 21;
  31 #include <tr1/unordered_map>
  32             ]],[[
  33 std::tr1::unordered_map<int, int> t
  34           ]])],
  35           [pandora_cv_tr1_unordered="yes"],
  36           [pandora_cv_tr1_unordered="no"])])
  37   ])
  38
  39   AS_IF([test "x${pandora_cv_stl_unordered}" != "xyes" -a "x${pandora_cv_tr1_unordered}" != "xyes"],[
  40     AC_CACHE_CHECK([for boost unordered_map],
  41       [pandora_cv_boost_unordered],[
  42         AC_COMPILE_IFELSE(
  43           [AC_LANG_PROGRAM([[#include <boost/unordered_map.hpp>]],
  44                            [[boost::unordered_map<int, int> t]])],
  45           [pandora_cv_boost_unordered="yes"],
  46           [pandora_cv_boost_unordered="no"])])
  47   ])
  48
  49   CXXFLAGS="${save_CXXFLAGS}"
  50   AC_LANG_POP()
  51
  52   AS_IF([test "x${pandora_cv_stl_unordered}" = "xyes"],[
  53     AC_DEFINE(HAVE_STD_UNORDERED_MAP, 1,
  54               [if the compiler has std::unordered_map])
  55     AC_DEFINE(HAVE_STD_UNORDERED_SET, 1,
  56               [if the compiler has std::unordered_set])
  57     pandora_has_unordered=yes
  58   ])
  59   AS_IF([test "x${pandora_cv_tr1_unordered}" = "xyes"],[
  60     AC_DEFINE(HAVE_TR1_UNORDERED_MAP, 1,
  61               [if the compiler has std::tr1::unordered_map])
  62     AC_DEFINE(HAVE_TR1_UNORDERED_SET, 1,
  63               [if the compiler has std::tr1::unordered_set])
  64     pandora_has_unordered=yes
  65   ])
  66   AS_IF([test "x${pandora_cv_boost_unordered}" = "xyes"],[
  67     AC_DEFINE(HAVE_BOOST_UNORDERED_MAP, 1,
  68               [if the compiler has boost::unordered_map])
  69     AC_DEFINE(HAVE_BOOST_UNORDERED_SET, 1,
  70               [if the compiler has boost::unordered_set])
  71     pandora_has_unordered=yes
  72   ])
  73
  74   AS_IF([test "x${pandora_has_unordered}" != "xyes"],[
  75     AC_MSG_WARN([could not find an STL unordered_map])
  76   ])
  77 ])
  78
  79 AC_DEFUN([PANDORA_HAVE_CXX_UNORDERED],[
  80   AC_REQUIRE([PANDORA_CXX_STL_UNORDERED])
  81 ])
  82
  83 AC_DEFUN([PANDORA_REQUIRE_CXX_UNORDERED],[
  84   AC_REQUIRE([PANDORA_HAVE_CXX_UNORDERED])
  85   AS_IF([test "x${pandora_has_unordered}" != "xyes"],[
  86     AC_MSG_ERROR([An STL compliant unordered_map is required for ${PACKAGE}.
  87     Implementations can be found in Recent versions of gcc and in boost])
  88   ])
  89 ])