1dnl @synopsis AC_CXX_CPPFLAGS_STD_LANG(CPP-FLAGS)
2dnl
3dnl Append to CPP-FLAGS the set of flags that should be passed to the
4dnl C++ preprocessor in order to enable use of C++ features as defined
5dnl in the ANSI C++ standard (eg. use of standard iostream classes in
6dnl the `std' namespace, etc.).
7dnl
8dnl @category Cxx
9dnl @author Ludovic Court�s <ludo@chbouib.org>
10dnl @version 2004-09-07
11dnl @license AllPermissive
12
13AC_DEFUN([AC_CXX_CPPFLAGS_STD_LANG],
14  [AC_REQUIRE([AC_CXX_COMPILER_VENDOR])
15   case "$ac_cv_cxx_compiler_vendor" in
16     compaq)
17      # By default, Compaq CXX has an iostream classes implementation
18      # that is _not_ in the `std' namespace.
19      $1="$$1 -D__USE_STD_IOSTREAM=1";;
20     hp)
21      # When `configure' looks for a C++ header (eg. <iostream>) it invokes
22      # `aCC -E $CPPFLAGS'.  However, including standard C++ headers like
23      # <iostream> fails if `-AA' is not supplied.
24      $1="$$1 -AA";;
25   esac])
26