gcc.c: Organize search path variables into $prefix relative, and well-known native.

gcc.c: Organize search path variables into $prefix relative, and well-known native.

gcc/

2006-11-13  Carlos O'Donell  <carlos@codesourcery.com>
	    Mark Mitchell  <mark@codesourcery.com>

	* gcc.c: Organize search path variables into $prefix relative,
	and well-known native. Add comments.
	(add_sysrooted_prefix): Add comment.
	(process_command): If !gcc_exec_prefix add $prefix based paths.
	If *cross_compile == '0', add native well-known paths.
	Assert tooldir_base_prefix is always relative.
	(main): If print_search_dirs, and if gcc_exec_prefix is set,
	use this value for 'install:' path.
	* Makefile.in: Add GCC_EXEC_PREFIX to generated site.exp.

gcc/testsuite/

2006-11-13  Carlos O'Donell  <carlos@codesourcery.com>

	* lib/c-torture.exp: Use target-libpath.exp.
	* lib/target-libpath.exp (set_ld_library_path_env_vars): If present,
	set GCC_EXEC_PREFIX env var from global variable of same name.

Co-Authored-By: Mark Mitchell <mark@codesourcery.com>
From-SVN: r118765