Re: flex/bison rebuilding issue

[Reuben Hawkins]

On Thu, Sep 9, 2010 at 8:29 PM, Philip Herron <address@hidden> wrote:
> On 10 September 2010 03:46, Reuben Hawkins <address@hidden> wrote:
>> Attached is my Makefile.am.  My problem is editing scanner.l or
>> grammar.y doesn't trigger a rebuild of my whole project when *I think*
>> it should...  How do I set dependencies such that editing scanner.l or
>> grammar.y will rebuild my whole parser?
>>
>
> Hey there
>
> I use flex and bison alot with automake and yeah this isn't the right
> forum to be asking about this since Makefile.am's are handled by
> automake. But anyways if you edit your lexer, why do you need to
> rebuild your whole thing? Its just like editing any .c file within a
> project just rebuild it and then link it all together.
>
> Looking at your Makefile i don't understand why your doing alot of
> stuff there, for what your doing there all you need is:
>
> bin_PROGRAMS = fixc
> noinst_LTLIBRARIES = libparser.la
>
> AM_YFLAGS = -d --verbose
>
> fixc_SOURCES = \
>        inc_parser.h \
>        main.c
>
> fixc_LDADD = \
>        libparser.la
>
> libparser_la_SOURCES = \
>        grammar.y \
>        parser.h \
>        pure.h \
>        scanner.l
>
> Having those extra hooks should be un-nessecary since ylwrap should
> handle the outputs fine, and it should know if changed to re-generate
> fine. I don't think making your parser as a shared library like that
> is the right idea, for what your doing there what i would do is:
>
> bin_PROGRAMS = fixc
> noinst_LIBRARIES = libparser.a
>
> AM_YFLAGS = -d --verbose
>
> fixc_SOURCES = \
>        inc_parser.h \
>        main.c
>
> fixc_LDADD = libparser.a
>
> libparser_a_CFLAGS =  -DPARSER
> libparser_a_SOURCES = parser.y lexer.l
>
> I've found when dealing with lexer's and parsers in a large program
> making those components into a static library is useful.
>
> --Phil
>

Hi Phil,

Thanks for the reply.  I have some followup I'm going to post on
Automake's mailing list...

Thanks,
Reuben