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graph: prefer *.gv to *.dot

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Reported by Hans Åberg.
https://lists.gnu.org/archive/html/help-bison/2019-02/msg00064.html

* src/files.c (spec_graph_file): Use `*.gv` when 3.4 or better,
otherwise `*.dot`.
* src/parse-gram.y (handle_require): Pretend we are already 3.4.
* doc/bison.texi: Adjust.
* tests/local.at, tests/output.at: Exercise this.
This commit is contained in:
Akim Demaille
2019-02-19 18:16:02 +01:00
parent 98020cedf7
commit bd55d43333
8 changed files with 42 additions and 28 deletions
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9
NEWS
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@@ -2,6 +2,12 @@ GNU Bison NEWS
* Noteworthy changes in release ?.? (????-??-??) [?]
** Changes
In conformance with the recommendations of the GraphViz team, if %require
"3.4" (or better) is specified, the option --graph generates a *.gv file
by default, instead of *.dot.
** New features
*** Disabling output
@@ -14,6 +20,9 @@ GNU Bison NEWS
A new example in C shows an simple infix calculator with a hand-written
scanner (examples/c/calc).
A new example in C shows a reentrant parser (capable of recursive calls)
built with Flex and Bison (examples/c/reccalc).
* Noteworthy changes in release 3.3.2 (2019-02-03) [stable]
** Bug fixes