2001-08-02 Richard Boulton <richard@tartarus.org>

2001-08-02  Richard Boulton <richard@tartarus.org>

	* automake.in (variable_conditions_sub): Handle variable
	substitution refs when computing conditions based on subvariable
	conditions.  Fixes substitution refs of system variables when sub
	variable is conditional.
	(SUBST_REF_PATTERN): New global.
	* tests/cond16.test: New file: regression test for variable
	substitution refs.
	* test/Makefile.am (TESTS): Added cond16.test.