AC_ARG_WITH(oss, [AS_HELP_STRING([--with-oss], [choose OSS API support (unixes)])])
AC_ARG_WITH(core, [AS_HELP_STRING([--with-core], [choose CoreAudio API support (mac only)])])
AC_ARG_WITH(asio, [AS_HELP_STRING([--with-asio], [choose ASIO API support (win32 only)])])
AC_ARG_WITH(oss, [AS_HELP_STRING([--with-oss], [choose OSS API support (unixes)])])
AC_ARG_WITH(core, [AS_HELP_STRING([--with-core], [choose CoreAudio API support (mac only)])])
AC_ARG_WITH(asio, [AS_HELP_STRING([--with-asio], [choose ASIO API support (win32 only)])])