Re: [Xenomai] Library cannot be dlopen()ed
Am Tue, 28 Nov 2017 23:24:40 + schrieb Giulio Moro : > Again, armv7 BeagleBone Black, Xenomai 3.0.5 > > My main executable uses the posix API, hence ldd tells me : > libcobalt.so.2 => /usr/xenomai/lib/libcobalt.so.2 (0xb6ed3000) > libmodechk.so.0 => /usr/xenomai/lib/libmodechk.so.0 > (0xb6f39000) > > I am trying to dlopen() a library which uses the native API > (alchemy+transition kit): libtrank.so.0 > => /usr/xenomai/lib/libtrank.so.0 (0xb6e71000) libalchemy.so.0 > => /usr/xenomai/lib/libalchemy.so.0 (0xb6e58000) libcopperplate.so.0 > => /usr/xenomai/lib/libcopperplate.so.0 (0xb6e3d000) libcobalt.so.2 > => /usr/xenomai/lib/libcobalt.so.2 (0xb6e18000) libmodechk.so.0 > => /usr/xenomai/lib/libmodechk.so.0 (0xb6e07000) > > the call to dlopen() fails with the following message: > libtrank.so.0: shared object cannot be dlopen()ed > > grepping the configured Xenomai source for "nodlopen" shows that all > (or most) of the libraries are compiled with -Wl,nodlopen, which is > what is preventing dlopen() from working. > > I have two questions: > - is it possible to dynamically load a library which uses the alchemy > API from a program that uses the cobalt API? > - is it at all possible to dynamically load a library that uses > xenomai in a program that was not linked against xenomai? Yes and yes. But i guess you have figured that out already. Henning > Thanks, > Giulio > > ___ > Xenomai mailing list > Xenomai@xenomai.org > https://xenomai.org/mailman/listinfo/xenomai ___ Xenomai mailing list Xenomai@xenomai.org https://xenomai.org/mailman/listinfo/xenomai
Re: [Xenomai] Library cannot be dlopen()ed
> From: Philippe Gerum > As mentioned in the documentation, --enable-dlopen-libs is needed when > configuring Brilliant, thanks. The docs mentions > Enabling dynamic loading introduces some overhead in TLS accesses when > enabled (see --enable-tls), which might be noticeable depending on the > architecture. Can you make an example of what operations incur overhead? Thanks, Giulio ___ Xenomai mailing list Xenomai@xenomai.org https://xenomai.org/mailman/listinfo/xenomai
Re: [Xenomai] Library cannot be dlopen()ed
On 11/29/2017 12:24 AM, Giulio Moro wrote: > Again, armv7 BeagleBone Black, Xenomai 3.0.5 > > My main executable uses the posix API, hence ldd tells me : > libcobalt.so.2 => /usr/xenomai/lib/libcobalt.so.2 (0xb6ed3000) > libmodechk.so.0 => /usr/xenomai/lib/libmodechk.so.0 (0xb6f39000) > > I am trying to dlopen() a library which uses the native API > (alchemy+transition kit): > libtrank.so.0 => /usr/xenomai/lib/libtrank.so.0 (0xb6e71000) > libalchemy.so.0 => /usr/xenomai/lib/libalchemy.so.0 (0xb6e58000) > libcopperplate.so.0 => /usr/xenomai/lib/libcopperplate.so.0 (0xb6e3d000) > libcobalt.so.2 => /usr/xenomai/lib/libcobalt.so.2 (0xb6e18000) > libmodechk.so.0 => /usr/xenomai/lib/libmodechk.so.0 (0xb6e07000) > > the call to dlopen() fails with the following message: > libtrank.so.0: shared object cannot be dlopen()ed > > grepping the configured Xenomai source for "nodlopen" shows that all (or > most) of the libraries are compiled with -Wl,nodlopen, which is what is > preventing dlopen() from working. > > I have two questions: > - is it possible to dynamically load a library which uses the alchemy API > from a program that uses the cobalt API? > - is it at all possible to dynamically load a library that uses xenomai in a > program that was not linked against xenomai? > > Thanks, > Giulio > > ___ > Xenomai mailing list > Xenomai@xenomai.org > https://xenomai.org/mailman/listinfo/xenomai > As mentioned in the documentation, --enable-dlopen-libs is needed when configuring: https://xenomai.org/installing-xenomai-3-x/#Generic_configuration_options_both_cores -- Philippe. ___ Xenomai mailing list Xenomai@xenomai.org https://xenomai.org/mailman/listinfo/xenomai
[Xenomai] Library cannot be dlopen()ed
Again, armv7 BeagleBone Black, Xenomai 3.0.5 My main executable uses the posix API, hence ldd tells me : libcobalt.so.2 => /usr/xenomai/lib/libcobalt.so.2 (0xb6ed3000) libmodechk.so.0 => /usr/xenomai/lib/libmodechk.so.0 (0xb6f39000) I am trying to dlopen() a library which uses the native API (alchemy+transition kit): libtrank.so.0 => /usr/xenomai/lib/libtrank.so.0 (0xb6e71000) libalchemy.so.0 => /usr/xenomai/lib/libalchemy.so.0 (0xb6e58000) libcopperplate.so.0 => /usr/xenomai/lib/libcopperplate.so.0 (0xb6e3d000) libcobalt.so.2 => /usr/xenomai/lib/libcobalt.so.2 (0xb6e18000) libmodechk.so.0 => /usr/xenomai/lib/libmodechk.so.0 (0xb6e07000) the call to dlopen() fails with the following message: libtrank.so.0: shared object cannot be dlopen()ed grepping the configured Xenomai source for "nodlopen" shows that all (or most) of the libraries are compiled with -Wl,nodlopen, which is what is preventing dlopen() from working. I have two questions: - is it possible to dynamically load a library which uses the alchemy API from a program that uses the cobalt API? - is it at all possible to dynamically load a library that uses xenomai in a program that was not linked against xenomai? Thanks, Giulio ___ Xenomai mailing list Xenomai@xenomai.org https://xenomai.org/mailman/listinfo/xenomai
