2009-07-13 Emmanuel Briot <briot@adacore.com>

2009-07-13  Emmanuel Briot  <briot@adacore.com>

	* gnatcmd.adb, prj-proc.adb, make.adb, mlib-prj.adb, prj-ext.adb,
	gnat_ugn.texi, prj.adb, prj.ads, clean.adb, prj-nmsc.adb, prj-util.adb,
	prj-conf.adb, gnatname.adb, prj-env.adb, prj-env.ads, prj-tree.adb,
	prj-tree.ads (Prj.Tree.Create*): New subprograms to create new packages
	and attributes in a project tree.
	(Add_Default_GNAT_Naming_Scheme): Provide real implementation.
	Remove last remaining mode-specific code (ada_only or
	multi_language). This was duplicating code
	(Get_Mode, Set_Mode): removed, no longer used.
	(Initialize_Project_Path): all tools will now take into account both
	GPR_PROJECT_PATH and ADA_PROJECT_PATH (in that order).
	Remove some global variables and subprograms no longer used
	Make temporary files tree-specific, to avoid interferences between
	trees loaded in memory at the same time.
	(Prj.Delete_Temporary_File): new subprogram
	(Object_Paths, Source_Paths): fields no longer stored in the project
	tree, since they are only needed locally in Set_Ada_Paths.
	(Set_Mapping_File_Initial_State_To_Empty): removed, since had no
	effect in practice.
	(Project_Tree_Data.Ada_Path_Buffer): removed, since it can be replaced
	by local variables in the appropriate subprograms
	(Has_Foreign_Sources): removed.

        * gcc-interface/Makefile.in: prj-pp.o is now needed to build gnatmake

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@149568 138bc75d-0d04-0410-961f-82ee72b054a4