AC_CXX_HAVE_EMPTY_IOSTREAM
, 

2003-04-09

Alain BARBET <alian@cpan.org>

GPLWithACException
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation. As a special exception, the respective Autoconf Macro's copyright owner gives unlimited permission to copy, distribute and modify the configure scripts that are the output of Autoconf when processing the Macro. You need not follow the terms of the GNU General Public License when using or distributing such scripts

cryp.to ac-archive's C++ Support (released)

Check if the compiler allow the empty iostream constructor. Ok before gcc3, not after.

AC_DEFUN([AC_CXX_HAVE_EMPTY_IOSTREAM],
[AC_CACHE_CHECK(whether the compiler allow empty iostream,
ac_cv_cxx_have_empty_iostream,
[AC_REQUIRE([AC_CXX_NAMESPACES])
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_COMPILE([#include <iostream>
#ifdef HAVE_NAMESPACES
using namespace std;
#endif],[iostream iostr; return 0;],
  ac_cv_cxx_have_empty_iostream=yes, ac_cv_cxx_have_empty_iostream=no)
  AC_LANG_RESTORE
])
if test "$ac_cv_cxx_have_empty_iostream" = yes; then
   AC_DEFINE(HAVE_EMPTY_IOSTREAM,,[define if the compiler allow empty
iostream])
fi
])