[CMake] Forcing linking compatability to old libc / libstdc++ (Linux)

[Alexander Neundorf]

On 2017 M01 26, Thu 18:23:05 CET Gonzalo Garramuño wrote:
> I currently own an Ubuntu Xenial 14.04.1 LTS box in which I do all my
> work.    I distribute a binary image viewer.   However, recently one of
> my users tried to run the viewer on a CentOS 7 distro and found out that
> that distro libc and libstdc++ are older and incompatible.
> 
> I would like to compile my program targeting the older libc and
> libstdc++.  Those files come with symbol version and visibility. Is
> there an easy way to do that other than copying the old libraries?

you may consider using docker to provide a build environment for an "old" 
distribution (CentOS 7 is actually quite bleeding edge... ;-) )
There are some CentOS5 images on dockerhub.

Alex