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[Bug build/20658] New: enable -Wimplicit-fallthrough


https://sourceware.org/bugzilla/show_bug.cgi?id=20658

            Bug ID: 20658
           Summary: enable -Wimplicit-fallthrough
           Product: gdb
           Version: unknown
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: tromey at sourceware dot org
  Target Milestone: ---

It would be worthwhile to enable the new gcc option -Wimplicit-fallthrough.
This can detect real bugs (I found a few small ones when trying this out).
See also bug 20613 and http://www.viva64.com/en/b/0430/

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