On Wednesday, March 22, 2017 at 11:00:24 PM UTC+1, Ian Lance Taylor wrote: > > On Wed, Mar 22, 2017 at 3:06 AM, Basile Starynkevitch > <bas...@starynkevitch.net <javascript:>> wrote: > > > > First, is Svetlin's golang-sharing-libraries tutorial still exactly > correct > > for Go1.8 specifically? Its title Sharing Golang packages to C and Go > is a > > bit misleading. I just want all my non-main packages to be "shared > objects" > > in Linux parlance > > (because I really don't want them to be compiled twice, once for the > main > > program and once for the plugin). I don't care if each of my package has > its > > own *.so file, or if all of them are agglomerated in one single *.so > file. > > BTW, I would > > prefer to avoid having tons of *.so files (what I would probably prefer > is > > to have all the non-main code of my thing as a single *.so file shared > > between main program & plugins). > > As far as I know that is correct. > > > In particular, is issue 12236 still relevant for Go 1.8 ? > > It is fixed in 1.8. > > You may find it helpful to read https://golang.org/s/execmodes . > > > > I am not sure to understand well how -buildmode=shared & -linkshared > should > > be used. Is there an up to date tutorial in how to use them precisely? > > Not that I know of. > > > > So how to force Go to systematically use -buildmode=shared? Is there > some > > comment directive for that? Or should I provide my own shell script to > build > > (I do know that the current one build-monimelt.sh is very buggy). > > You would have to use a shell script or something. There is no way to > make it the default, and really that wouldn't even make sense: you > would not to use -buildmode=shared when building your main executable, > only when building the packages that it imports. > > > Is -buildmode=pie useful for me (I believe that not)? > > I doubt that it is useful. > > > The documentation of -linkshared is saying just: > > > >> -linkshared > >> link against shared libraries previously created with > >> -buildmode=shared. > > > > > > and I find that explanation too short (what happens if by mistake a > previous > > package was compiled twice, both with -buildmode=shared & > -buildmode=default > > and what happens if two weeks ago I have compiled my purple package -in > some > > older version- with -buildmode=default and today I am compiling it -an > > improved version- with -buildmode=shared) ? > > -linkshared is going to find the last package you built and installed > using `go install -buildmode=shared ...`. > >
Thanks for the help. Using plugins is really difficult in practice. https://blog.ksub.org/bytes/2017/02/12/exploring-shared-objects-in-go/ is very helpful. To Go implementors: the multiple roots error message is *really* cryptic. It should be a lot more explicit. Thanks for reading -- Basile Starynkevitch <http://starynkevitch.net/Basile/> (France) -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
