Hi Michael,
> You could try passing '-no-pie' when linking the xspress3App executable.
That worked, I can now build and run the IOC on Ubuntu 18.
> Having libimg_mod.a recompiled with -fPIC would probably be the desirable long term solution.
I will ask the vendor (Quantum Detectors) about that.
> Running
>> readelf -r libimg_mod.a |grep R_X86_64_32
> might show something interesting, like whether the relocation
> is referring to an internal name, or eg. something from libc
I have appended that output. I am not sure how to interpret it.
Thanks very much for the quick reply.
Mark
TahoeU18:/corvette/home/epics/devel/xspress3/lib/linux-x86_64-ub18> readelf -r libimg_mod.a |grep R_X86_64_32
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________________________________
From: Michael Davidsaver <[email protected]>
Sent: Saturday, December 7, 2019 1:47 AM
To: Mark Rivers
Cc: tech-talk
Subject: Re: Linker error with vendor library
On 12/6/19 7:24 PM, Mark Rivers via Tech-talk wrote:
> Folks,
>
>
> I am trying to build the EPICS Xspress3 driver. It builds fine on Centos 7 with gcc 4.5
>
>
> On Ubuntu 18 with gcc 7.4 I get this error:
>
>
> *************
>
> /usr/bin/ld: /corvette/home/epics/devel/areaDetector-3-8/xspress3-2-2/lib/linux-x86_64-ub18/libimg_mod.a(img_mod_linux.o): relocation R_X86_64_32 against `.rodata' can not be used when making a PIE object; recompile with -fPIC
> /usr/bin/ld: final link failed: Nonrepresentable section on output
> collect2: error: ld returned 1 exit status
> /corvette/usr/local/epics-devel/base-7.0.3.1/configure/RULES_BUILD:212: recipe for target 'xspress3App' failed
> make[1]: *** [xspress3App] Error 1
>
> *************
>
> libimg_mod.a is a pre-built library provided by the vendor. Is there something I can change in the link options to avoid this error, or do we need to get a new library from the vendor?
You could try passing '-no-pie' when linking the xspress3App executable.
Having libimg_mod.a recompiled with -fPIC would probably be the desirable long term solution.
Running
> readelf -r libimg_mod.a |grep R_X86_64_32
might show something interesting, like whether the relocation
is referring to an internal name, or eg. something from libc
- References:
- Linker error with vendor library Mark Rivers via Tech-talk
- Re: Linker error with vendor library Michael Davidsaver via Tech-talk
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