Re: How to link mod_perl with a debugging libperl?

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Dominique Quatravaux wrote:
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> 
> Hello mod_perl hackers,
> 
> Contrary to what I (mis?)understood from the documentation, MP_DEBUG
> does not allow one to link mod_perl against the debugging libperl.a:
> 
> ~  $   debugperl Makefile.PL MP_INST_APACHE2=1 MP_APXS=/usr/bin/apxs2    \
> ~      MP_APR_CONFIG=/usr/bin/apr-config MP_DEBUG=1
> ~  [...]
> ~  $   grep MODPERL_LDOPTS src/modules/perl/Makefile
> 
> MODPERL_LDOPTS = -rdynamic  -L/usr/local/lib
> /usr/lib/perl/5.6.1/auto/DynaLoader/DynaLoader.a
> - -L/usr/lib/perl/5.6.1/CORE -lperl -ldl -lm -lc -lcrypt
> 
> ...No -lperld there (not that it would help my case, I need a
> "-ldebugperl" for Debian's perl-debug packaging anyway). After reading
> the source, I thought I found a way to trick ExtUtils::Embed into
> doing what I want. I appended "-- -ldebugperl" onto the Makefile.PL
> command line, but the result was thus:
> 
> MODPERL_LDOPTS =  -rdynamic  -L/usr/local/lib
> - -L/usr/lib/perl/5.6.1/CORE -ldebugperl -ldebugperl
> 
> And so DynaLoader.a is gone, and of course the resulting mod_perl.so
> doesn't bootstrap.
> 
> How can I link with -ldebugperl without manually fiddling with the
> Makefile (which I did, and it works great)?

Dominique, I guess we (developers) all have perl built with debug enabled, 
so we never needed this feature. I suppose you could change the code to 
check whether libperld exists and link it instead of libperl under 
MP_DEBUG=1 (and send a patch here)? Please check how mp1 does it, if I 
remember correctly it did pick libperld under MP_DEBUG=1. If you need 
help, les us know. Thanks.

        -- 
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Stas Bekman            JAm_pH ------> Just Another mod_perl Hacker
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