gcc/ChangeLog:
PR driver/67613
* Makefile.in (GCC_OBJS): Add spellcheck.o.
(OBJS): Add spellcheck-tree.o.
* gcc.c: Include "spellcheck.h".
(suggest_option): New function.
(driver::handle_unrecognized_options): Call suggest_option to
provide a hint about misspelled options.
* spellcheck.c: Update file comment.
(levenshtein_distance): Convert 4-param implementation from static
to extern scope. Remove note about unit tests from leading
comment for const char * implementation. Move tree
implementation to...
* spellcheck-tree.c: New file.
* spellcheck.h (levenshtein_distance): Add 4-param decl.
gcc/testsuite/ChangeLog:
PR driver/67613
* gcc/testsuite/gcc.dg/spellcheck-options-1.c: New file.
* gcc/testsuite/gcc.dg/spellcheck-options-2.c: New file.
From-SVN: r230285
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