PR ada/34289
	* lib.ads: (Enable_Switch_Storing): Declare.
	* lib.adb: (Enable_Switch_Storing): New procedure.
	* switch-c.adb (Scan_Front_End_Switches): Add support for -gnatea.
	* make.adb: (Compile_Sources.Compile): Add -gnatea as first option.
	(Display): Never display -gnatea
	* gcc-interface/lang-specs.h: If -gnatea is present, pass -gnatez.

Co-Authored-By: Eric Botcazou <ebotcazou@adacore.com>

From-SVN: r141673