-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Ralf Wildenhues on 11/29/2009 2:10 PM: > > BTW, and this is why I'm adding bug-autoconf here: Not changing the > AC_DEFUNs here to m4_define causes Autoconf 2.65 to barf with > configure.ac:7: error: m4_divert_push: cannot change diversion to `GROW' > inside m4_expand
This has been the case since 2.63b, when m4_expand was taught to handle more cases. And your workaround of using m4_define instead of m4_defun is correct. The NEWS sort of mentions that these interfaces were affected, but doesn't give many details about this particular type of failure, does it. > > which seems a bit surprising to me. What's the NEWS entry that > described this change in behavior? Or was that always problematic > and we only didn't notice earlier by chance? It's always been problematic to try to guess in advance what a macro will expand to, while diversions are in play. It's just that newer versions of autoconf use m4_expand more than previous versions. AC_DEFUN/m4_defun imply the use of diversions to get topological sorting correct, and AC_INIT pre-expands the version string, so the two don't really mix. But m4_define does nothing to diversions, so it is safe for AC_INIT. - -- Don't work too hard, make some time for fun as well! Eric Blake e...@byu.net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAksTxUgACgkQ84KuGfSFAYBUTwCfSFUX+NprQ7DwMrD0Rv9MYq8U F30An05IGCH9NdRRKxJkFzj9Z9YzMRwG =98BL -----END PGP SIGNATURE-----
