2010-10-04  Vincent Celier  <celier@adacore.com>

	* a-direct.adb (Copy_File): Interpret the Form parameter and call
	System.OS_Lib.Copy_File to do the work accordingly. Raise Use_Error if
	the Form parameter contains an incorrect value for field preserve= or
	mode=.
	* a-direct.ads (Create_Directory, Create_Path): Indicate that the Form
	parameter is ignored.
	(Copy_File): Indicate the interpretation of the Form parameter.

2010-10-04  Vincent Celier  <celier@adacore.com>

	* make.adb (Gnatmake): When there are no foreign languages declared and
	a main in attribute Main of the main project does not exist or is a
	source of another project, fail immediately before attempting
	compilation.

2010-10-04  Javier Miranda  <miranda@adacore.com>

	* exp_disp.ads (Convert_Tag_To_Interface): New function which must be
	used to convert a node referencing a tag to a class-wide interface type.
	* exp_disp.adb (Convert_Tag_To_Interface): New function.
	(Expand_Interface_Conversion): Replace invocation of
	Unchecked_Conversion by new function Convert_Tag_To_Interface.
	(Write_DT): Add support for null primitives.
	* exp_ch3.adb (Expand_N_Object_Declaration): For tagged type objects,
	cleanup code that handles interface conversions and avoid unchecked
	conversion of referenced tag components.
	* exp_ch5.adb (Expand_N_Assignment_Statement): Code cleanup. Avoid
	unrequired conversions when generating a dispatching call to _assign.
	* sprint.adb (Write_Itype): Fix wrong output of not null access itypes.

2010-10-04  Ed Schonberg  <schonberg@adacore.com>

	* exp_ch4.adb (Expand_N_Op_Not): Handle properly both operands when the
	parent is a binary boolean operation and the operand is an unpacked
	array.
	(Build_Boolean_Array_Proc_Call): If the operands are both negations, the
	operands of the rewritten node are the operands of the negations, not
	the negations themselves.

From-SVN: r164942