canonicalize: Avoid a false-positive cycle failure.

[pspp] / ChangeLog

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 2007-09-27  Jim Meyering  <jim@meyering.net>
 
+       canonicalize: Avoid a false-positive cycle failure.
+       * modules/canonicalize (Depends-on): Add file-set and hash-triple.
+       Sort.  Remove cycle-check.
+       * lib/canonicalize.c: Include file-set.h and hash-triple.h,
+       not cycle-check.h.
+       (seen_triple): New function.
+       (canonicalize_filename_mode): Use it instead of cycle-check.
+       * tests/test-canonicalize.c: Add a test for this bug.
+       * tests/test-canonicalize.sh: Set up and run the test.
+
        New module, file-set.
        * modules/file-set: Define it.
        * lib/file-set.c, lib/file-set.h: Implement.