Using bisect.pl for a thread error

MCMic has asked for the wisdom of the Perl Monks concerning the following question:

Hello,
I'm trying to figure out when a bug was fixed in perl using bisect.pl.
The bug is a glibc crash occurring when I do the following:
perl -e 'use threads;use POE::Kernel; threads->create(sub{})->join;'
It works with 5.16, crash with 5.14

I tried the following:
../perl/Porting/bisect.pl -Accflags=-Duseithreads --start v5.14.0 --end v5.16.0 --expect-fail -- ./perl -Ilib -e "use threads;use POE::Kernel; threads->create(sub{})->join; exit;"
But I get "This Perl not built to support threads", despite my use of "-Duseithreads"

What am I missing?

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Re: Using bisect.pl for a thread error by Corion (Patriarch) on May 07, 2013 at 16:16 UTC
Have you tried `-Dusethreads` (no "i" there)?	[reply] [d/l]
Re: Using bisect.pl for a thread error by dave_the_m (Monsignor) on May 07, 2013 at 19:40 UTC
You're setting -Duseithreads in the wrong place. This is Configure's -D, not the C compiler's -D. Just drop the 'Accflags': `../perl/Porting/bisect.pl -Duseithreads --start v5.14.0 --end v5.16.0 +--expect-fail -- ./perl -Ilib -e "use threads;use POE::Kernel; thread +s->create(sub{})->join; exit;"` [download] Dave.	[reply] [d/l]
Re^2: Using bisect.pl for a thread error by MCMic (Initiate) on May 08, 2013 at 07:14 UTC
Thank you, that was indeed the problem! http://search.cpan.org/dist/perl-5.17.10/Porting/bisect-runner.pl#OPTIONS is not very clear about that, I read "-Accflags=-DNO_MATHOMS Arguments to pass to Configure." While it meant -A, -D and -U arguments were passed to configure.	[reply]