ac_cxx_cxxflags_std_lang

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').

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])

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