Bug#684290: libapache2-mod-perl2: SizeLimite requires Linux::Pid

[Damyan Ivanov]

-=| Dean Hamstead, 08.08.2012 13:34:33 +0000 |=-
> Package: libapache2-mod-perl2
> Version: 2.0.7-1
> Severity: normal
> 
> pretty straight forward, Linux::pid is needed but doesnt seem to 
> exist in debian.
> 
> root at webgui:~# perl -e 'use Apache2::SizeLimit'
> You must install Linux::Pid for Apache::SizeLimit to work on your platform. at /usr/lib/perl5/Apache/SizeLimit/Core.pm line 128.
> BEGIN failed--compilation aborted at /usr/lib/perl5/Apache/SizeLimit/Core.pm line 171.

I wonder if packaging Linux::Pid is the right way to go. Its tests 
say:
t/threaded.t .. 1..9
ok 1 - use Linux::Pid;
ok 2 - $pid defined
ok 3 - $ppid defined
ok 4 - $pid2 defined
ok 5 - $ppid2 defined
ok 6 - $pid non null
ok 7 - $pid2 non null
ok 8 # skip thread model is NPTL 2.13
# 
ok 9 # skip thread model is NPTL 2.13
# 
ok

So it seems that the reason for Linux::Pid's existence is not really 
useful.

Some (perhaps naive)  testing shows this:
 $ perl -Mthreads -MPOSIX=getppid,getpid -Mfeature=say -Mstrict -we  say "$$ ".POSIX::getppid()." ".POSIX::getpid(); threads->create(sub {say "T: $$ ".POSIX::getppid()." ".POSIX::getpid()})->join;'
 31523 4122 31523
 T: 31523 4122 31523
i.e. PID and PPID don't change in the thread. I guess this is why 
Apache2::SizeLimit wants Linux::Pid, but it seems that the tests 
suggest it won't be useful either. Indeed, commenting the conditional 
skip makes the tests fail.

Any suggestions?
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