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dnl @synopsis AC_CXX_HAVE_NAMESPACESdnldnl If the compiler can prevent names clashes using namespaces, definednl HAVE_NAMESPACES.dnldnl @category Cxxdnl @author Todd Veldhuizendnl @author Luc Maisonobe <luc@spaceroots.org>dnl @version 2004-02-04dnl @license AllPermissive
AC_DEFUN([AC_CXX_HAVE_NAMESPACES],[AC_CACHE_CHECK(whether the compiler implements namespaces,ac_cv_cxx_have_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_have_namespaces=yes, ac_cv_cxx_have_namespaces=no) AC_LANG_RESTORE])if test "$ac_cv_cxx_have_namespaces" = yes; then AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces])fi])
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