* Paul Eggert wrote on Thu, Apr 20, 2006 at 01:50:48AM CEST: > Bruno Haible <[EMAIL PROTECTED]> writes: > > > + But about AC_CHECK_DECLS_ONCE: note that in > > + autoconf >= 2.60 the symbol separator is a comma, whereas here it is > > + whitespace. > > I hadn't noticed this incompatibility. It is a real hassle.
One solution is to forbid _any_ Gnulib (or other non-Autoconf-provided) macro to start with `AC_'. I thought this was a convention agreed upon long ago (much longer than, say, `build-aux' as a directory name). Then one could even write an autoupdate rule to transform gl_CHECK_DECLS_ONCE into AC_CHECK_DECLS_ONCE and change the white-space separated list into a M4 list at the same time (with reasonably safe heuristics).[1] We could scan the argument of Autoconf's AC_CHECK_DECLS_ONCE at M4 time and warn if we find white space but no comma. (Similarly Gnulib's version if we find comma.) Cheers, Ralf [1] You should note that, until recently, autoupdate was really almost unusable; but a couple of nasty bugs in it have been squatted, and maybe it's already good enough for many uses now. :-)
