[dpdk-dev] [PATCH 0/4] Fix build issues with CONFIG_RTE_BUILD_COMBINE_LIBS=y
Sergio Gonzalez Monroy
sergio.gonzalez.monroy at intel.com
Fri Oct 3 12:31:10 CEST 2014
On Thu, Oct 02, 2014 at 04:24:51PM -0400, Neil Horman wrote:
> On Thu, Oct 02, 2014 at 01:04:20PM -0700, Matthew Hall wrote:
> > On Thu, Oct 02, 2014 at 01:26:34PM -0400, Neil Horman wrote:
> > > Just out of curiosity, whats the impetus behind a single shared library here?
> > > Is it just to ease application linking operations? If so, it almost seems to me
> > > that we should abandon the individual linking method and just use this as the
> > > default output (and do simmilarly for the static linking build)
> > >
> > > Neil
> >
> > Not clear if you wrote "single shared library" on purpose instead of "single
> > static library". But for me the objective of COMBINE_LIBS usage would be
> > getting a "single static library" for my app, which just works, and eliminates
> > need of start-group, end-group, weird library ordering issues, etc. I'm not
> > interested personally in a "shared library" because it'd run slower.
> >
> Actually I do need to revise my question, thank you. you're right, doing a
> single archive for static builds makes the most sense, because you wind up with
> a static binary anyway, and as such, theres really no need for multiple dpdk
> archives. We should just create a single dpdk.a file and be done with it.
>
> The shared libraries are a different story. While at first it made sense to me
> to merge them all, it actually doesn't because PMD's might be built
> independently and shipped separate from the core library.
Sorry Neil, could you elaborate a bit on why it would not make sense to have a
single/combined shared library?
Sergio
>
> > Personally my preference would be to do both the single libs and multiple libs
> > in static format by default. Disk space is cheap, let's maximize user freedom
> > and flexibility. But shared lib, since it performs less well, should be
> > discouraged by default, although allowed if needed... some people prefer it
> > because it's easier to patch security vulns if you can replace a buggy library
> > for all the code on a system.
> >
> This seems somewhat irrelevant to the patch. The default configuration is
> already the way you want it to be, shared library performance is actually very
> close to static performance, and yes, people can choose how they want to build.
> Not sure what point your trying to make here.
> Neil
>
> > Matthew.
> >
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