Macro: ac_cxx_have_ext_hash_map

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Synopsis

  `AC_CXX_HAVE_EXT_HASH_MAP`

Version

  1.1 (2002/12/12) C++_Support @ ac-archive-0.5.39

Author

  Perceval ANICHINI <perceval.anichini@epita.fr>

Description

  Check if the compiler has ext/hash_map Eg:

  `#if defined(HAVE_EXT_HASH_MAP)`
  `#include <ext/hash_map>`
  `#else`
  `#if defined(HAVE_STL)`
  `#include <hash_map>`
  `#else`
  `# Can't find hash_map header !`
  `#endif`
  `#endif`

  This file is Alain BARBET's AC_CXX_HAVE_EXT_HASH_SET 1.1 with s/set/map/g :)

M4 Source Code

      AC_DEFUN([AC_CXX_HAVE_EXT_HASH_MAP],
      [AC_CACHE_CHECK(whether the compiler has ext/hash_map,
      ac_cv_cxx_have_ext_hash_map,
      [AC_REQUIRE([AC_CXX_NAMESPACES])
        AC_LANG_SAVE
        AC_LANG_CPLUSPLUS
        AC_TRY_COMPILE([#include <ext/hash_map>
      #ifdef HAVE_NAMESPACES
      using namespace std;
      #endif],[hash_map<int, int> t; return 0;],
        ac_cv_cxx_have_ext_hash_map=yes, ac_cv_cxx_have_ext_hash_map=no)
        AC_LANG_RESTORE
      ])
      if test "$ac_cv_cxx_have_ext_hash_map" = yes; then
         AC_DEFINE(HAVE_EXT_HASH_MAP,,[define if the compiler has ext/hash_map])
      fi
      ])