2010-06-23  Javier Miranda  <miranda@adacore.com>

	* sem_ch3.adb (Add_Internal_Interface_Entities): Generate internal
	entities for parent types that are interfaces. Needed in generics to
	handle formals that implement interfaces.
	(Derive_Subprograms): Add assertion for derivation of tagged types that
	do not cover interfaces. For generics, complete code that handles
	derivation of type that covers interfaces because the previous
	condition was weak (it required only name consistency; arguments were
	not checked). Add new code to locate primitives covering interfaces
	defined in generic units or instantiatons.
	* sem_util.adb (Has_Interfaces): Add missing support for derived types.
	* sem_ch6.adb (Check_Overriding_Indicator): Minor code cleanups.
	* exp_disp.adb (Make_Select_Specific_Data_Table): Skip primitives of
	interfaces that are parents of the type because they share the primary
	dispatch table.
	(Register_Primitive): Do not register primitives of interfaces that
	are parents of the type.
	* sem_ch13.adb (Analyze_Freeze_Entity): Add documentation.
	* exp_cg.adb (Write_Type_Info): When displaying overriding of interface
	primitives skip primitives of interfaces that are parents of the type.

2010-06-23  Ed Schonberg  <schonberg@adacore.com>

	* sem_attr.adb (Eval_Attribute): If the prefix is an array, the
	attribute cannot be constant-folded if an index type is a formal type,
	or is derived from one.
	* checks.adb (Determine_Range): ditto.

2010-06-23  Arnaud Charlet  <charlet@adacore.com>

	* gnat_ugn.texi, gnatxref.adb: Add support for --ext switch.

2010-06-23  Bob Duff  <duff@adacore.com>

	* g-pehage.ads, g-pehage.adb (Put): Fix off-by-one bug.
	(Insert): Disallow nul characters.
	(misc output routines): Assert no nul characters.

From-SVN: r161247