2017-09-06  Bob Duff  <duff@adacore.com>

	* a-comlin.ads, a-comlin.adb (Argument): Move the constraint
	check back to the body, because SPARK is not yet ready for
	"or else raise Constraint_Error".

2017-09-06  Ed Schonberg  <schonberg@adacore.com>

	* exp_ch6.adb (Expand_Call_Helper): Replace call to null
	procedure by a single null statement, after evaluating the
	actuals that require it.

2017-09-06  Javier Miranda  <miranda@adacore.com>

	* exp_aggr.adb (Backend_Processing_Possible.Component_Check):
	Generating C code improve the code that checks the use of nested
	aggregates to initialize object declarations.

2017-09-06  Yannick Moy  <moy@adacore.com>

	* sem_ch3.adb (Derived_Type_Declaration): Detect
	violations of new rule SPARK RM 3.4(1).  Also refactor existing
	check to use the new function Find_Partial_View.

2017-09-06  Vincent Celier  <celier@adacore.com>

	* gnatcmd.adb: gnat ls -V -P... invokes gprls -V -P...	The code
	from the Prj hierarchy has been removed from the GNAT driver.

2017-09-06  Ed Schonberg  <schonberg@adacore.com>

	* sem_type.adb (Interface_Present_In_Ancestor): Within an
	expression function, or within a spec expression (default value,
	etc) a reference to an incomplete type is legal: legality of
	the operation will be checked when some related entity (type,
	object or subprogram) is frozen.

From-SVN: r251776