1999-10-31 Akim Demaille <akim@epita.fr>

1999-10-31  Akim Demaille  <akim@epita.fr>

	Rename the family AC_NEED_DECL as AC_CHECK: it is more uniform,
	but keep defining NEED_FOO_DECL when `foo' is not declared.  Files
	not using Autoconf behave better when declarations lacks than when
	they are wrong.  So the unset position should off, hence #if NEEDS
	instead of #if !HAVE (which is triggered when HAVE is not set).

	* acgeneral.m4 (AC_NEED_DECL): Renamed as...
	(AC_CHECK_DECL): This.  Make sure the arguments are the usual
	IF-FOUND, IF-NOT-FOUND.
	(AC_NEED_DECLS, AC_CHECK_DECLS): Likewise.
	* autoconf.texi (Generic Declarations): Document the changes
 	aforementioned.
	* autoheader.m4 (AH_NEED_DECLS): Renamed as
	(AH_CHECK_DECLS): This.
	(AH_HOOKS): Hook AH_CHECK_DECLS on AC_CHECK_DECLS instead of
	_NEED_.