-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Paolo Bonzini on 12/14/2007 7:03 AM: >> What is the m4_provide_if? I didn't find it in the manual of autoconf >> and m4. > > It's in m4sugar. > >> Anyways, does this guarantee me that the user did INVOKE the give >> macros, not merely that they exist? Actually, m4_provide_if/AC_PROVIDE_IFELSE([macro]) guarantees that someone has previously called m4_provide/AC_PROVIDE([macro]), whether or not it has been invoked. There are situations where you can have an alternative macro that does the same or better than the original macro, in which case the alternative can call m4_provide([original]); this also guarantees that attempts to later call the less-powerful original will be diagnosed, since the interface was already provided by the alternative. - -- Don't work too hard, make some time for fun as well! Eric Blake ebb9@xxxxxxx -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHYpn084KuGfSFAYARAgzZAKCUQ5Lhxv1SYnIXum5ZyjY0sCXiJACg0cFP X1os53p5R2FbNYTN9QAxC3g= =kgep -----END PGP SIGNATURE----- _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf