Hello Caolan, Tor, I've done some research and I've more or less understood how it works now.
Now, with Avahi, I am supposed to use dlsym to import several functions from libavahi-client.so.3 and libavahi-common.so.3 during the runtime. However, the dlsym should return a pointer to the function which, in order to be used, need to be casted with correct return type/argument types. The problem is, these types are declared in the shared object and I still don't have access to them. For example, I can dlsym this function and get the void * to it, but how can I use it if I don't have access to the struct AvahiClient (declaired in the shared object)? AvahiClient<http://avahi.org/download/doxygen/client_8h.html#a3d65e9ea7182c44fa8df04a72f1a56bb> * avahi_client_new<http://avahi.org/download/doxygen/client_8h.html#a07b2a33a3e7cbb18a0eb9d00eade6ae6> (const AvahiPoll <http://avahi.org/download/doxygen/struct_avahi_poll.html> * poll_api, AvahiClientFlags<http://avahi.org/download/doxygen/client_8h.html#a46a797e5d352f6f98261834ae3b1a3ed> flags,AvahiClientCallback<http://avahi.org/download/doxygen/client_8h.html#a24ece0cd8c27c269a1ddd3cf3acf6444> callback,void * userdata, int * error ) Am I on the right track ? Any help or link to some tutorials would be appreciated! Thanks! Siqi On Thu, Jan 9, 2014 at 4:57 PM, Caolán McNamara <caol...@redhat.com> wrote: > On Tue, 2014-01-07 at 15:31 +0100, Siqi Liu wrote: > > Tor pushed a quick fix for that and disabled avahi temporarily so that > > it doesn't get compiled unless specified. I'm thinking of fixing that > > but not sure how to load Avahi dynamically depending on the presence > > of Avahi library on the distribution. > > > > Any pointers on how to achieve that? > > We've done stuff like this plenty of times in the past. One current one > is sc/source/core/opencl/clcc.cxx see the dlopen, dlsym hackery. > > C. > > -- -------- Cordialement, Siqi LIU Étudiant Ingénieur, 1ère année École Supérieur d'Électricité (Supélec)
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