dnl @synopsis AC_CXX_HAVE_STRSTREAM

dnl

dnl If the C++ library has a working strstream, define HAVE_CLASS_STRSTREAM.

dnl

dnl Adapted from ac_cxx_have_sstream.m4 by Steve Robbins

dnl

AC_DEFUN([AC_CXX_HAVE_STRSTREAM],

[AC_CACHE_CHECK(whether the library defines class strstream,

ac_cv_cxx_have_class_strstream,

[AC_REQUIRE([AC_CXX_NAMESPACES])

 AC_LANG_SAVE

 AC_LANG_CPLUSPLUS

 AC_CHECK_HEADERS(strstream)

 AC_TRY_COMPILE([

#if HAVE_STRSTREAM

#  include <strstream>

#else

#  include <strstream.h>

#endif

#ifdef HAVE_NAMESPACES

using namespace std;

#endif],[ostrstream message; message << "Hello"; return 0;],

 ac_cv_cxx_have_class_strstream=yes, ac_cv_cxx_have_class_strstream=no)

 AC_LANG_RESTORE

])

if test "$ac_cv_cxx_have_class_strstream" = yes; then

  AC_DEFINE(HAVE_CLASS_STRSTREAM,1,[define if the library defines strstream])

fi

])