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dnl Autoconf extension macros for libIDL
AC_DEFUN([AC_CPP_ACCEPT_IDL],
[AC_CACHE_CHECK([if C preprocessor likes IDL],
ac_cv_cpp_accept_idl,
[AC_TRY_CPP([
#pragma prefix "foo.org"
module FOO {
typedef unsigned long long big;
interface BAR {
readonly attribute big number;
};
};
],
ac_cv_cpp_accept_idl=yes,
ac_cv_cpp_accept_idl=no)])])
AC_DEFUN([AC_CPP_PIPE_STDIN],
[AC_CACHE_CHECK([if C preprocessor can read from stdin],
ac_cv_cpp_pipe_stdin,
[AC_REQUIRE_CPP
if echo | $CPP - 2>/dev/null 1>&2 ; then
ac_cv_cpp_pipe_stdin=yes
else
ac_cv_cpp_pipe_stdin=no
fi])
if test $ac_cv_cpp_pipe_stdin = yes ; then
AC_DEFINE(HAVE_CPP_PIPE_STDIN)
fi])
AC_DEFUN([AC_UPDATE_IF_CHANGED],
[if test -f "$2"; then
if cmp -s "$1" "$2" 2>/dev/null; then
echo "$1 is unchanged"
else
echo "$1 has changed"
rm -f "$1"
cp "$2" "$1"
fi
fi])
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