2006-02-13  Vincent Celier  <celier@adacore.com>

	* make.adb (Collect_Arguments_And_Compile): For VMS, when compiling the
	main source, add switch -mdebug-main=_ada_ so that the executable can
	be debugged by the standard VMS debugger.
	(Gnatmake): Set No_Main_Subprogram to True when there is no main
	subprogram, to avoid issuing -mdebug-main=_ada_ for VMS uselessly.
	Exit the Multi_Main_Loop when Unique_Compile is True after compilation
	of the last source, as the binding and linking phases are never
	performed.
	Set all executable obsolete when rebuilding a library.

	* makeutl.adb (Linker_Options_Switches): Do not process empty linker
	options.

From-SVN: r111078