make.adb (Check_Mains, [...]): Adapt to name changes in package Prj (Current_Spec_Suffix => Ada_Spec_Suffix...

	* make.adb (Check_Mains, Switches_Of): Adapt to name changes in
	package Prj (Current_Spec_Suffix => Ada_Spec_Suffix,
	Current_Body_Suffix => Ada_Body_Suffix).
	Take into account Externally_Built attribute.

	* clean.adb (In_Extension_Chain): Always return False when one of the
	parameter is No_Project.
	(Clean_Project): Adapt to changes in package Prj (Lang_Ada =>
	Ada_Language_Index).
	(Gnatclean): Adapt to change in package Prj.Pars (no parameter
	Process_Languages for procedure Parse).

	* gnatcmd.adb (Carg_Switches): New table.
	(GNATCmd): Put all switches following -cargs in the Carg_Switches table.
	Adapt to name changes in package Prj (Current_Spec_Suffix =>
	Ada_Spec_Suffix, Current_Body_Suffix => Ada_Body_Suffix).

	* mlib-prj.adb: Adapt to changes in packages Prj and Prj.Com: type
	Header_Num and function Hash are now declared in package Prj,
	not Prj.Com.

	* prj.adb (Suffix_Of): New function.
	(Set (Suffix)): New procedure.
	(Hash): One function moved from Prj.Com
	(Is_Present, Language_Processing_Data_Of): New functions
	(Set): Two new procedures
	(Add_Language_Name, Display_Language_Name): New procedures

	* prj.ads: (Suffix_Of): New function
	(Set (Suffix)): New procedure
	Add several types and tables for multi-language support.
	(Header_Num): Type moved from Prj.Com
	(Hash): Two functions moved from Prj.Com
	(Is_Present, Language_Processing_Data_Of): New functions
	(Set): Two new procedures
	(Add_Language_Name, Display_Language_Name): New procedures
	(Naming): Component name changes:
	Current_Spec_Suffix => Ada_Spec_Suffix,
	Current_Body_Suffix => Ada_Body_Suffix. Add new components:
	Impl_Suffixes, Supp_Suffixes.
	(Project_Data): New components: Externally_Built, Supp_Languages,
	First_Language_Processing, Supp_Language_Processing, Default_Linker,
	Default_Linker_Path.

	* prj-attr.adb: Add new attributes Ada_Roots and Externally_Built and
	new package Language_Processing with its attributes (Compiler_Driver,
	Compiler_Kind, Dependency_Option, Compute_Dependency, Include_Option,
	Binder_Driver, Default_Linker).

	* prj-com.ads, prj-com.adb (Hash): Function moved to package Prj.
	(Header_Num): Type moved to package Prj

	* prj-env.adb: Adapt to name changes in package Prj
	(Current_Spec_Suffix => Ada_Spec_Suffix,
	Current_Body_Suffix => Ada_Body_Suffix).

	* prj-ext.adb: Add the default project dir (<prefix>/log/gnat) by
	default to the project path, except the "-" is one of the directories
	in env var ADA_PROJECT_PATH.
	(Current_Project_Path): Global variable, replacing Project_Path
	that was in the body of Prj.Part.
	(Project_Path): New function
	(Set_Project_Path): New procedure
	Initialize Current_Project_Path during elaboration of the package
	Remove dependency on Prj.Com, no longer needed

	* prj-ext.ads (Project_Path): New function
	(Set_Project_Path): New procedure

	* prj-nmsc.adb (Body_Suffix_Of): New function. Returns .<lang> when no
	suffix is defined for language <lang>.
	(Find_Sources, Record_Other_Sources): Use Body_Suffix_Of, instead of
	accessing directly the components of Naming.
	(Look_For_Sources): Use Set (Suffix) to set the suffix of a language.
	Reorganise of this package.
	Break procedure Check in several procedures.

	* prj-nmsc.ads: Replace all procedures (Ada_Check,
	Other_Languages_Check and Language_Independent_Check) with a single
	procedure Check.

	* prj-pars.ads, prj-pars.adb (Parse): Remove parameter
	Process_Languages, no longer needed.

	* prj-part.adb (Project_Path): Move to the body of Prj.Ext as
	Current_Project_Path.
	Remove elaboration code, moved to the body of Prj.Ext
	Use new function Prj.Ext.Project_Path instead of old variable
	Project_Path.
	(Post_Parse_Context_Clause): Get Resolved_Path as a case-sensitive path.
	When comparing with project paths on the stack, first put the resolved
	path in canonical case.
	(Parse_Single_Project): Set the path name of the project file in the
	tree to the normalized path.

	* prj-proc.ads, prj-proc.adb (Check, Recursive_Check, Process): Remove
	parameter Process_Languages, no longer needed.
	(Recursive_Check): Call Prj.Nmsc.Check, instead of Ada_Check and
	Other_Languages_Check.

	* prj-tree.ads (Project_Name_And_Node): New component Canonical_Path
	to store the resolved canonical path of the project file.
	Remove dependency to Prj.Com, no longer needed

	* prj-util.adb: Adapt to name changes in package Prj
	(Current_Spec_Suffix => Ada_Spec_Suffix, Current_Body_Suffix =>
	Ada_Body_Suffix).

	* snames.ads, snames.adb: New standard names: Ada_Roots, Binder_Driver,
	Compiler_Driver, Compiler_Kind, Compute_Dependency, Default_Linker,
	Externally_Built, Include_Option, Language_Processing.

	* makegpr.adb: Numerous changes due to changes in packages
	Prj and Prj.Nmsc.

	* gnatls.adb: Add the default project dir (<prefix>/log/gnat) by
	default to the project path, except whe "-" is one of the directories
	in env var ADA_PROJECT_PATH.
	(Gnatls): In verbose mode, add the new section "Project Search Path:"

From-SVN: r91877