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26 lines
752 B
26 lines
752 B
dnl @synopsis AC_CXX_HAVE_STD_NAMESPACE
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dnl
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dnl If the compiler supports the std namespace, define
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dnl HAVE_STD_NAMESPACE.
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dnl
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dnl @category Cxx
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dnl @author Todd Veldhuizen
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dnl @author Luc Maisonobe <luc@spaceroots.org>
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dnl @version 2004-02-04
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dnl @license AllPermissive
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AC_DEFUN([AC_CXX_HAVE_STD_NAMESPACE],
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[AC_CACHE_CHECK(whether the compiler supports the std namespace,
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ac_cv_cxx_have_std_namespace,
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[AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_COMPILE([#include <iostream>
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std::istream& is = std::cin;
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],[return 0;],
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ac_cv_cxx_have_std_namespace=yes, ac_cv_cxx_have_std_namespace=no)
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AC_LANG_RESTORE
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])
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if test "$ac_cv_cxx_have_std_namespace" = yes; then
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AC_DEFINE(HAVE_STD_NAMESPACE,,[define if the compiler supports the std namespace])
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fi
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])
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