arm/154189: lang/perl5.12 doesn't build on arm

Fri Sep 23 05:10:05 UTC 2011

The following reply was made to PR arm/154189; it has been noted by GNATS.

From: Naoyuki Tai <ntai at smartfruit.com>
To: bug-followup at FreeBSD.org, kvedulv at kvedulv.de
Cc:  
Subject: Re: arm/154189: lang/perl5.12 doesn't build on arm
Date: Fri, 23 Sep 2011 00:42:41 -0400

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 I have built miniperl that runs by removing  "-DPIC -fPIC" from the c flags
 everywhere.
 After "make build" fails at miniperl core dump, I removed the *.o, and
 removed "-DPIC -fPIC" from make files, cflags, etc.
 Then, I restarted the build in the work/perl-5-12.4 directory with gmake.
 This builds miniperl that runs.

 miniperl crashes regardless of debug or optimized build.
 So, this is not a compiler optimization problem.

 From those two, the reason of miniperl core dump may be because the objects
 compiled with -fPIC is not compatible with static-linked miniperl, or
 miniperl thinking it's statically linked.
 I suspect that the register for PIC is not either properly set, or the it's
 using wrong register for PIC access.

 On Intel machine, the objects compiled with -fPIC links fine with miniperl.

 Someone with the knowledge of ARM linkage model should be able to at least
 diag the issue more precisely, or suggest appropriate compile/link options.

 Another possible work around is to build the perl as statically linked
 binary and not create libperl.so.

 -- Tai

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I have built miniperl that runs by removing=C2=A0 &quot;-DPIC -fPIC&quot; f=
 rom the c flags everywhere. After &quot;make build&quot; fails at minipe=
 rl core dump, I removed the *.o, and removed &quot;-DPIC -fPIC&quot; from m=
 ake files, cflags, etc. 
 Then, I restarted the build in the work/perl-5-12.4 directory with gmake.<b=
 r>This builds miniperl that runs. miniperl crashes regardless of deb=
 ug or optimized build. So, this is not a compiler optimization problem.=
 
 From those two, the reason of miniperl core dump may be because the obj=
 ects compiled with -fPIC is not compatible with static-linked miniperl, or =
 miniperl thinking it&#39;s statically linked. I suspect that the registe=
 r for PIC is not either properly set, or the it&#39;s using wrong register =
 for PIC access. 
 On Intel machine, the objects compiled with -fPIC links fine with minip=
 erl. Someone with the knowledge of ARM linkage model should be able =
 to at least diag the issue more precisely, or suggest appropriate compile/l=
 ink options. 
 Another possible work around is to build the perl as statically linked =
 binary and not create libperl.so. 
 -- Tai

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