Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <[email protected]> · Fri, 6 Dec 2019 23:47:38 -0800

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

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System