[irc/UndernetIRC/gnuworld.git] / ac_cxx_namespaces.m4

dnl @synopsis AC_CXX_NAMESPACES
dnl
dnl If the compiler can prevent names clashes using namespaces, define
dnl HAVE_NAMESPACES.
dnl
dnl @category Cxx
dnl @author Todd Veldhuizen
dnl @author Luc Maisonobe <luc@spaceroots.org>
dnl @version 2004-02-04
dnl @license AllPermissive

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 "$ac_cv_cxx_namespaces" = yes; then
  AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces])
fi
])
Commit	Line	Data
1fed6a87	1	dnl @synopsis AC_CXX_NAMESPACES
	2	dnl
	3	dnl If the compiler can prevent names clashes using namespaces, define
	4	dnl HAVE_NAMESPACES.
	5	dnl
	6	dnl @category Cxx
	7	dnl @author Todd Veldhuizen
	8	dnl @author Luc Maisonobe <luc@spaceroots.org>
	9	dnl @version 2004-02-04
	10	dnl @license AllPermissive
	11
	12	AC_DEFUN([AC_CXX_NAMESPACES],
	13	[AC_CACHE_CHECK(whether the compiler implements namespaces,
	14	ac_cv_cxx_namespaces,
	15	[AC_LANG_SAVE
	16	AC_LANG_CPLUSPLUS
	17	AC_TRY_COMPILE([namespace Outer { namespace Inner { int i = 0; }}],
	18	[using namespace Outer::Inner; return i;],
	19	ac_cv_cxx_namespaces=yes, ac_cv_cxx_namespaces=no)
	20	AC_LANG_RESTORE
	21	])
	22	if test "$ac_cv_cxx_namespaces" = yes; then
	23	AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces])
	24	fi
	25	])