On Thu, 2003-11-27 at 23:01, RamÃn Casero CaÃas wrote: > Hi all. I'm starting to use autoconf version 2.13 (Debian testing > package), and would like that it tells me whether the iostream headers > are installed or not. My configure.in is: You probably want to read about AC_LANG_PUSH and AC_LANG_POP in autoconf.info. Ralf