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ac_cxx_namespace_std

Synopsis

AC_CXX_NAMESPACE_STD

Description

If the compiler supports namespace std, define HAVE_NAMESPACE_STD.

Authors

Todd Veldhuizen and Luc Maisonobe <luc@spaceroots.org>.

Last Modified

2008-04-12

M4 Source Code

AC_DEFUN([AC_CXX_NAMESPACE_STD], [
  AC_CACHE_CHECK(if g++ supports namespace std,
  ac_cv_cxx_have_std_namespace,
  [AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_COMPILE([#include <iostream>
                  std::istream& is = std::cin;],,
  ac_cv_cxx_have_std_namespace=yes, ac_cv_cxx_have_std_namespace=no)
  AC_LANG_RESTORE
  ])
  if test "$ac_cv_cxx_have_std_namespace" = yes; then
    AC_DEFINE(HAVE_NAMESPACE_STD,,[Define if g++ supports namespace std. ])
  fi
])

License

Copyright © 2008 Todd Veldhuizen
Copyright © 2008 Luc Maisonobe <luc@spaceroots.org>

Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.