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

	* back_end.adb (Scan_Compiler_Arguments): Check if
	Search_Directory_Present is True and, if it is, add the argument in
	the source search directory path.

	* switch-c.adb (Scan_Front_End_Switches): Accept switch "-I". Set
	Search_Directory_Present to True.

From-SVN: r111044