[Ovmsdev] yacc/lex on component/dbc

[Michael Balzer]

Builds fine on Linux with flex & bison, which I think come with those wrappers on most distributions.

Regards,
Michael


Am 23.11.18 um 05:38 schrieb Mark Webb-Johnson:
>
> I am trying to move the hand-crafted dbc parser (which is pretty crappy) to a full featured parser based on yacc/lex. But I’m concerned this will be complex
> to build (requiring yacc and lex on the build systems). Given that esp idf already uses this (for Kconfig), it should be ok.
>
> I have committed a stub for this (into components/dbc). It compiles for me with two warnings:
>
>     /components/dbc/yacclex/dbc_tokeniser.c:1630:17: warning: 'yyunput' defined but not used [-Wunused-function]
>          static void yyunput (int c, register char * yy_bp )
>                      ^
>     components/dbc/yacclex/dbc_tokeniser.c:1675:16: warning: 'input' defined but not used [-Wunused-function]
>          static int input  (void)
>                     ^
>
>
> Those warnings are acceptable, and will be resolved when the full implementation comes.
>
>   * On my mac it worked fine
>   * On Linux, I had to install bison and setup a /usr/bin/yacc wrapper
>   * I haven’t tried at all on windows
>
>
> Could you guys check, and let me know if you see any issues? In particular, on windows. If no issues, I’ll proceed and finish up the grammar and implementation.
>
> Regards, Mark.
>
>
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