[PATCH] PR driver/69265: add hint for options with misspelled arguments

[Jeff Law]

On 05/09/2016 06:14 PM, David Malcolm wrote:
> opts-common.c's cmdline_handle_error handles invalid arguments
> for options with CL_ERR_ENUM_ARG by building a strings listing the
> valid arguments.  By also building a vec of valid arguments, we
> can use find_closest_string and provide a hint if we see a close
> misspelling.
>
> Successfully bootstrapped&regrtested on x86_64-pc-linux-gnu.
>
> OK for trunk?
>
> gcc/ChangeLog:
> 	PR driver/69265
> 	* Makefile.in (GCC_OBJS): Move spellcheck.o to...
> 	(OBJS-libcommon-target): ...here.
> 	* opts-common.c: Include spellcheck.h.
> 	(cmdline_handle_error): Build a vec of valid options and use it
> 	to suggest provide hints for misspelled arguments.
>
> gcc/testsuite/ChangeLog:
> 	PR driver/69265
> 	* gcc.dg/spellcheck-options-11.c: New test case.
OK.
jeff