Re: Problem with LIBS generated by a macro

[Sergio Belkin]

2010/10/31 Ralf Wildenhues <address@hidden>:
> Hello Sergio,
>
> * Sergio Belkin wrote on Sat, Oct 30, 2010 at 11:55:17PM CEST:
>> I've autoconfiscated a project that link against libresolv and
>> libtpthread, and optionally against ssl, mysqlclient and pq. I am
>> working on Fedora 13 (i686).
>>
>> I've found a macro AX_EXT_HAVE_LIB
>> (http://www.gnu.org/software/autoconf-archive/ax_ext_have_lib.html)
>> that "is identical to AC_SEARCH_LIBS with the exception that will add
>> -L<directory> when looking, and use a different variable for each
>> directory. " It seems great for me!
>>
>> The problem is that at the end only take the last library found, in my
>> case "pq".
>>
>> It seems that macro override the earlier value of "LIBS" variable.
>
> This looks like a bug in the AX_EXT_HAVE_LIB macro to me, as it is
> documented to only add to LIBS but not remove existing entries.

Indeed.

>
>>  I've examined the configure script but it's a bit tricky, you may
>> read a snippet about the macro on http://pastebin.com/vHKYp0UR
>>
>> I've tried modifying macro, replacing the final LIBS="$new_libs" por
>> LIBS="$new_libs $LIBS" which you may read  on
>> http://pastebin.com/DNCCfgnU
>>
>> But now LIBS ends as: '-lpq -lmysqlclient -lssl -lpthread -lresolv
>> -lssl -lpthread -lresolv '
>>
>> It seems harmless but it's too ugly, isn't it?
>
> Not necessarily.

Not necessarily what? :)  (sorry english is not my native language) Do
you say that that cane be harmful or that is not ugly? :)

>
> I suggest you report this to the autoconf-archive-maintainers list,
> or their bug tracker, so that the macro can be fixed.

Good point I've done it.

>
> Cheers,
> Ralf
>



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