##### http://autoconf-archive.cryp.to/ac_cxx_cxxflags_std_lang.html
#
# SYNOPSIS
#
#   AC_CXX_CXXFLAGS_STD_LANG(CXX-FLAGS)
#
# DESCRIPTION
#
#   Append to variable CXX-FLAGS the set of compile-time flags that
#   should be passed to the C++ compiler in order to enable use of C++
#   features as defined in the ANSI C++ standard (eg. use of standard
#   iostream classes in the `std' namespace, etc.). Note that if you
#   use GNU Libtool you may need to prefix each of those flags with
#   `-Xcompiler' so that Libtool doesn't discard them (see Libtool's
#   manual and `AC_LIBTOOLIZE_CFLAGS').
#
# LAST MODIFICATION
#
#   2004-09-07
#
# COPYLEFT
#
#   Copyright (c) 2004 Ludovic Courtès <ludo@chbouib.org>
#
#   Copying and distribution of this file, with or without
#   modification, are permitted in any medium without royalty provided
#   the copyright notice and this notice are preserved.

AC_DEFUN([AC_CXX_CXXFLAGS_STD_LANG],
  [AC_REQUIRE([AC_CXX_COMPILER_VENDOR])
   case "$ac_cv_cxx_compiler_vendor" in
     sgi)    $1="$$1 -LANG:std -exceptions";;
     hp)     $1="$$1 -AA";;
   esac])