Macro: ac_cxx_namespaces

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Synopsis

  `AC_CXX_NAMESPACES`

Version

  1.1.1.1 (2001/07/26) C++_Support @ ac-archive-0.5.39

Author

  Luc Maisonobe

Description

  If the compiler can prevent names clashes using namespaces, define HAVE_NAMESPACES.

M4 Source Code

      AC_DEFUN([AC_CXX_NAMESPACES],
      [AC_CACHE_CHECK(whether the compiler implements namespaces,
      ac_cv_cxx_namespaces,
      [AC_LANG_SAVE
       AC_LANG_CPLUSPLUS
       AC_TRY_COMPILE([namespace Outer { namespace Inner { int i = 0; }}],
                      [using namespace Outer::Inner; return i;],
       ac_cv_cxx_namespaces=yes, ac_cv_cxx_namespaces=no)
       AC_LANG_RESTORE
      ])
      if test "$ac_cv_cxx_namespaces" = yes; then
        AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces])
      fi
      ])