[dpdk-dev] RFC enabling dll/dso for dpdk on windows

[Tyler Retzlaff]

On Mon, Jul 19, 2021 at 12:12:12PM +0300, Dmitry Kozlyuk wrote:
> > 
> > mingw emutls just makes it compile allowing the variables to be exported,
> > the binaries still won't work without loader support. or are you saying
> > they do?
> > 
> > > 
> > > No, it is not acceptable to add a generic feature supported by only one
> > > compiler. (FWIW, I'm displeased even by mlx5 being tied to clang.)
> > > Particularly, I don't understand how could MinGW and clang coexist
> > > if they export different sets of symbols. Apps will need to know
> > > if it's MingW- or clang-compiled DPDK? Sounds messy.  
> > 
> > it doesn't seem reasonable to reject the feature because mingw may or
> > may not work.  mingw binaries are not worse off if the feature can be
> > enabled with clang. either way it is untested i am uncertain if it will
> > work with mingw and have no time budget to test it. if it made mingw
> > built binaries "worse" i would agree with you but the worst case
> > scenario is that it works exactly as well as it does now.
> 
> My mistake, I thought we exported __emutls.VARNAME symbols (in which case
> MinGW DLLs would work without loader change). Since we don't, then you're
> right, we have the same set of exported symbols and can enable this feature.
> I'm willing to share the effort and help with MinGW.

sounds good to me, i'll work on a draft patch with you and when we have
something acceptable we'll formally post it.

thanks for helping out.