26 lines
726 B
Plaintext
26 lines
726 B
Plaintext
dnl @synopsis AX_CXX_NAMESPACE_STD
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dnl
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dnl If the compiler supports namespace std, define
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dnl HAVE_CXX_NAMESPACE_STD.
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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([AX_CXX_NAMESPACE_STD], [
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AC_CACHE_CHECK(if c++ supports namespace std,
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ax_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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ax_cv_cxx_have_std_namespace=yes, ax_cv_cxx_have_std_namespace=no)
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AC_LANG_RESTORE
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])
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if test "$ax_cv_cxx_have_std_namespace" = yes; then
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AC_DEFINE(HAVE_CXX_NAMESPACE_STD,,[Define if c++ supports namespace std. ])
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fi
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])
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