On 02/16/2015 05:10 PM, Martyn Foster wrote:
On 16 February 2015 at 15:12, Kevin Kofler <kevin.kofler@xxxxxxxxx
<mailto:kevin.kofler@xxxxxxxxx>> wrote:
Christopher Meng wrote:
> Maintaining several version of the same library is not easy as you think,
> basically once a developer wants to install version X while then another
> people want to deploy things based on version Y, how to crack this nut?
> You can't just care about runtime.
Then you need to patch one or the other package to work with the same
version. Only if that is not possible, a compatibility library can be
considered. But we should always first try to make everything work
with the
same version (if possible, the newer one).
The requirement to work with multiple versions of a package come up in
the scientific/HPC community very frequently. Its not always about API
compatibility, sometimes exact numerical reproduction is required which
isn't preserved even between minor versions (i.e. an OS update).
I don't buy this argument wrt. Fedora.
Fedora is a rapid moving, forward looking distro, in which such
regressions should be fixed and not be worked around by compat-libs.
Ralf
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