Experimental Physics and
Industrial Control System

Michael Davidsaver <[email protected]> · Mon, 6 Nov 2017 21:43:20 -0600

During the build process certain directory paths are built into the
libraries and executables.  As you are cross-comiling, these are paths
on the build computer.  Your target computer has different paths.

On the target, try setting the following in your shell

> export PATH=$PATH:$HOME/base/bin/linux-arm
> export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$HOME/base/lib/linux-arm

If you're curious, you can use the 'readelf' or 'ldd' utilities to see
which library names and paths are built into an executable or library.

> $ x86_64-linux-gnu-readelf -d bin/linux-x86_64/caget
> 
> Dynamic section at offset 0x6d90 contains 32 entries:
>   Tag        Type                         Name/Value
>  0x0000000000000001 (NEEDED)             Shared library: [libca.so.3.16.1]
>  0x0000000000000001 (NEEDED)             Shared library: [libCom.so.3.16.1]
>  0x0000000000000001 (NEEDED)             Shared library: [libstdc++.so.6]
>  0x0000000000000001 (NEEDED)             Shared library: [libm.so.6]
>  0x0000000000000001 (NEEDED)             Shared library: [libgcc_s.so.1]
>  0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
>  0x000000000000001d (RUNPATH)            Library runpath: [/home/mdavidsaver/work/epics/base-git/lib/linux-x86_64]
>  0x000000000000000c (INIT)               0x1718

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System