There should be no need to change anything except what your plugin links against.
As Damjan wrote: unless you’re more specific – name the symbols involved, where they’re defined, etc. - we can’t help you. Dave From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of siddarth rai Sent: Friday, January 3, 2020 2:14 AM To: Damjan Marion <dmar...@me.com> Cc: vpp-dev <vpp-dev@lists.fd.io> Subject: Re: [vpp-dev] Linking external libraries to VPP executable Hi, My plugin is linked to an external lib. When my plugin calls the init function of that external lib, it runs into some problems with symbols (presumably the external lib init function calls a dlopen to load some other files) It seems the problem comes from the fact that VPP calls a dlopen of plugins. A simple executable linking directly to the external library and calling the init function of the external lib does not give the same problem. I prototyped the whole scenario by making a stub executable (acting like VPP executable). Also made a stub shared object (like the plugin) which links to the external lib. Then I did a dlopen of this shared object from my stub executable (just like VPP) where the shared object code calls the init function of external lib. This reproduces the same problem as seen with VPP. I then linked my stub executable with the external library in addition and then everything worked fine. In fact, I went ahead and changed the src/vlib/CMakeLists.txt so that external lib links with vlib. This works fine for me. I just wanted to find out, if there is any generic infra available to link additional external libraries to say, vlib, without fiddling around with the build system of VPP. Regards, Siddarth On Thu, Jan 2, 2020 at 7:38 PM Damjan Marion <dmar...@me.com<mailto:dmar...@me.com>> wrote: 99% of vpp code is not in vpp executable so i wander why do you want to do that? both some of vpp standard libraries (vnet, vlib, ..) and some of vpp plugins are linked against libs, so to be able to help you i need more details... -- Damjan On 2 Jan 2020, at 14:20, siddarth rai <sid...@gmail.com<mailto:sid...@gmail.com>> wrote: Hi, I mean only 'vpp executable' Regards, Siddarth On Thu, Jan 2, 2020 at 5:10 PM Damjan Marion <dmar...@me.com<mailto:dmar...@me.com>> wrote: what do you mean by “vpp executable lib”? can you provide more details what exactly do you want to do? -- Damjan > On 2 Jan 2020, at 12:27, siddarth rai > <sid...@gmail.com<mailto:sid...@gmail.com>> wrote: > > > Hello, > > I am working on VPP 1908. > I want to link some external non-vpp libraries to my vpp executable lib. > > Would it work if I add the path of external lib to vlib/CMakeLists.txt file > using 'LINK_LIBRARIES' ? > > Can anyone tell if this is the right way or if there is any other way ? > > Any help will be appreciated. > > Thank you, > Siddarth > -=-=-=-=-=-=-=-=-=-=-=- > Links: You receive all messages sent to this group. > > View/Reply Online (#15013): https://lists.fd.io/g/vpp-dev/message/15013 > Mute This Topic: https://lists.fd.io/mt/69378301/675642 > Group Owner: vpp-dev+ow...@lists.fd.io<mailto:vpp-dev%2bow...@lists.fd.io> > Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub > [dmar...@me.com<mailto:dmar...@me.com>] > -=-=-=-=-=-=-=-=-=-=-=- -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#15020): https://lists.fd.io/g/vpp-dev/message/15020 Mute This Topic: https://lists.fd.io/mt/69378301/675642 Group Owner: vpp-dev+ow...@lists.fd.io<mailto:vpp-dev%2bow...@lists.fd.io> Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub [dmar...@me.com<mailto:dmar...@me.com>] -=-=-=-=-=-=-=-=-=-=-=-
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