Re: [Xen-devel] xen 4.4.0 dependency lzo fails to build from source due to fPIC

[Don Slutz <dslutz@xxxxxxxxxxx>]

On 07/30/14 03:01, Jan Beulich wrote:
> > > > On 29.07.14 at 22:21, <dslutz@xxxxxxxxxxx> wrote:
> > On 07/29/14 02:46, Jan Beulich wrote:
> > > > > > On 28.07.14 at 23:02, <anthony@xxxxxxxxxxxxxxx> wrote:
> > > > If xen detects lzo, it tries to build tools/xclib/libxenguest.so.4.4.0
> > > > with lzo support but fails with the error:
> > > >
> > > > /usr/bin/ld:
> > > > /usr/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../../lib64/liblzo2.a(lzo_ini
> > > > t.o):
> > > > relocation R_X86_64_PC32 against symbol '_lzo_config_check' can not be
> > > > used when making a shared object; recompile with -fPIC
> > > >
> > > > reading around the subject it would seem to be a problem with the lzo
> > > > library (2.08) which has been built without using the -fPIC option.
> > > > However, when I look at the lzo package there is no standard way to
> > > > build it with -fPIC. My workaround has been simply to remove the lzo
> > > > package, but I'm not sure this is a good solution, and I don't
> > > > understand why this problem doesn't seem to have been encountered before.
> > > >
> > > > Should I be building Xen with LZO support? (does everybody else build
> > > > without LZO support?)
> > > >
> > > > Should I be adding fPIC to the LZO options and rebuilding LZO?
> > > >
> > > > Is there something else I'm doing wrong that is causing the problem?
> > This could also be "broken toolchain" as:
> >
> >
> >    Subject: Re: [Xen-devel] [Qemu-devel] [Bug 1257099] [NEW]
> >    QEMU fails to build on CentOS 5.10 with relocation
> >    R_X86_64_PC32 error - msg#00032
> >
> >
> > On 12/14/13 15:21, Don Slutz wrote:
> > On 12/09/13 08:22, Paolo Bonzini wrote:
> >
> > Il 09/12/2013 13:47, Don Slutz ha scritto:
> >
> > On 12/05/13 22:20, Don Slutz wrote:
> >
> > On 12/05/13 16:24, Richard Henderson wrote:
> >
> > On 12/06/2013 04:18 AM, Paolo Bonzini wrote:
> >
> > $ gcc -shared -o f.so f.c -fPIE -fPIC
> > /usr/bin/ld: /tmp/ccQc9els.o: relocation R_X86_64_PC32 against `f'
> > can not be used when making a shared object; recompile with -fPIC
> > /usr/bin/ld: final link failed: Bad value
> > collect2: ld returned 1 exit status
> >
> >
> > The bug is simply that "-fPIE -fPIC" counts as -fPIE rather than -fPIC:
> >
> > $ gcc -S -o - f.c -fPIE |grep call
> >       call    f                      # PC32 relocation
> > $ gcc -S -o - f.c -fPIC |grep call
> >       call    f@PLT                  # PLT32 relocation
> >
> > The easy workaround is to drop -fPIE when we're adding -fPIC.
> Question is - where did you spot us using -fPIE outside any of the
> external trees? I didn't find any instance.
I did not find any.  I also have no issues build with lzo.  So I took a 
guess that
this info might help Anthony Wright track down what is wrong.

   -Don Slutz


> Jan



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