Hi, AC_CHECK_HEADERS wants a whitespace separated list. AC_CHECK_FUNCS wants a whitespace separated list. AC_CHECK_DECLS wants a comma separated list. AC_LIBSOURCES wants a comma separated list.
Why?! In m4 commas are used delimit things with different semantics, for example the first and the second argument of a macro invocation, or the name and the body of a macro. Whereas in m4 traditionally when things are separated only by spaces you know that they will be treated the same way. Such gratuitous syntactic unconsistencies make it harder to write autoconf macros. So I would suggest that you get back to the usual m4 syntax and change AC_CHECK_DECLS and AC_LIBSOURCES to allow a whitespace separated list, and no longer document that it also accepts a comma separated list. Bruno
