You should remove -lvlib it is not needed here. If you really want to link with vlib, you must fix the link ordering: vlib depends upon vppinfra (where os_exit is defined) so you'd need link as -lvlib -lvppinfra instead of the opposite (the C linker scan libraries symbols in reverse order, so symbols declared in a library are available to libraries listed *before*).
Best ben > -----Original Message----- > From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Venumadhav > Josyula > Sent: jeudi 30 septembre 2021 16:09 > To: Akash S R <akashsr.akas...@gmail.com> > Cc: Benoit Ganne (bganne) <bga...@cisco.com>; Ole Troan > <otr...@employees.org>; RaviKiran Veldanda <ravi.jup...@gmail.com>; vpp- > dev <vpp-dev@lists.fd.io> > Subject: Re: [vpp-dev] VPP Socket API how to use from the application > #socket-api #vpp #sock-api > > Hi Akash, > > Thansks, now after devtoolset, > > > @Benoit Ganne (bganne) <mailto:bga...@cisco.com> , @Ole Troan > <mailto:otr...@employees.org> > > i am getting following error > > [root@8f57181df3a1 vpp_c_api_examples]# gcc vpp_api_client_test3.c -o > vpp_api_client_test3.o -lvlibmemoryclient -lsvm -lvppinfra -lvlib > /opt/rh/devtoolset-9/root/usr/libexec/gcc/x86_64-redhat-linux/9/ld: > /lib/../lib64/libvlib.so: undefined reference to > `classify_get_trace_chain' > /opt/rh/devtoolset-9/root/usr/libexec/gcc/x86_64-redhat-linux/9/ld: > /lib/../lib64/libvlib.so: undefined reference to > `stat_segment_register_gauge' > /opt/rh/devtoolset-9/root/usr/libexec/gcc/x86_64-redhat-linux/9/ld: > /lib/../lib64/libvlib.so: undefined reference to `os_exit' > collect2: error: ld returned 1 exit status > [root@8f57181df3a1 vpp_c_api_examples]# > > Let me paste the code again, > #include<stdio.h> > #include<stdlib.h> > #include <vlibapi/api.h> > #include <vlibmemory/api.h> > #include <vpp/api/vpe_msg_enum.h> > > #define vl_typedefs > #define vl_endianfun > #include <vpp/api/vpe_all_api_h.h> > #undef vl_typedefs > #undef vl_endianfun > > int main() > { > char *name = "vpp-test-app"; > > clib_mem_init_thread_safe (0, 64ULL << 20); > > if (vl_client_api_map("/vpe-api")) > { > printf("unable to map....\n"); > goto quit; > } > if (vl_client_connect("vpp-test-app", 0, 32) < 0) > { > printf("unable to connect \n"); > vl_client_api_unmap(); > goto quit; > } > printf("successfully connected... \n"); > quit: > return 0; > } > > Is this wrong way, i am trying to use APIs ? > > Thanks, > Regards > Venu > > > On Thu, 30 Sept 2021 at 19:00, Akash S R <akashsr.akas...@gmail.com > <mailto:akashsr.akas...@gmail.com> > wrote: > > > Hey Venu, > > Try "scl enable devtoolset-9 bash" inside your docker or update your > gcc version. > > > /Akash S R > > On Thu, Sep 30, 2021, 18:54 Venumadhav Josyula <vjosy...@gmail.com > <mailto:vjosy...@gmail.com> > wrote: > > > Hi Benoit, > > Thanks for quick reply. > > I have docker with following > [root@8f57181df3a1 vpp_c_api_examples]# rpm -qa | grep vpp > vpp-lib-21.06.0-4~g0d9d3a0.x86_64 > vpp-api-lua-21.06.0-4~g0d9d3a0.x86_64 > vpp-api-python3-21.06.0-4~g0d9d3a0.x86_64 > vpp-debuginfo-21.06.0-4~g0d9d3a0.x86_64 > vpp-selinux-policy-21.06.0-4~g0d9d3a0.x86_64 > vpp-21.06.0-4~g0d9d3a0.x86_64 > vpp-plugins-21.06.0-4~g0d9d3a0.x86_64 > vpp-devel-21.06.0-4~g0d9d3a0.x86_64 > > This will vpp running in it. > > [root@8f57181df3a1 /]# cat /etc/redhat-release > CentOS Linux release 7.3.1611 (Core) > [root@8f57181df3a1 /]# > > > Eg. use devtoolset-9 (gcc-9). > > > How do I use it ? > > Thanks, > Regards, > Venu > > > On Thu, 30 Sept 2021 at 18:47, Benoit Ganne (bganne) > <bga...@cisco.com <mailto:bga...@cisco.com> > wrote: > > > You should upgrade your compiler... GCC-4 is way too > old. > Eg. use devtoolset-9 (gcc-9). > > Best > ben > > > -----Original Message----- > > From: vpp-dev@lists.fd.io <mailto:vpp-dev@lists.fd.io> > <vpp-dev@lists.fd.io <mailto:vpp-dev@lists.fd.io> > On Behalf Of > Venumadhav > > Josyula > > Sent: jeudi 30 septembre 2021 14:49 > > To: otr...@employees.org <mailto:otr...@employees.org> > > Cc: RaviKiran Veldanda <ravi.jup...@gmail.com > <mailto:ravi.jup...@gmail.com> >; vpp-dev <vpp- > > d...@lists.fd.io <mailto:d...@lists.fd.io> > > > Subject: Re: [vpp-dev] VPP Socket API how to use from > the application > > #socket-api #vpp #sock-api > > > > Hi Ole / Others, > > > > > > > > Thanks for your email, i getting following compilation > error > > [root@8f57181df3a1 vpp_c_api_examples]# gcc > vpp_api_client_test3.c -o > > vpp_api_client_test3.o -lvlibmemoryclient -lsvm - > lvppinfra -lvlib > > In file included from > /usr/include/vppinfra/error.h:41:0, > > from /usr/include/vlibapi/api.h:24, > > from vpp_api_client_test3.c:3: > > /usr/include/vppinfra/clib.h:43:18: error: missing > binary operator before > > token "(" > > #if __has_include(<vppinfra/config.h>) > > ^ > > In file included from > /usr/include/vppinfra/mem.h:49:0, > > from /usr/include/vppinfra/vec.h:42, > > from > /usr/include/vppinfra/error.h:53, > > from /usr/include/vlibapi/api.h:24, > > from vpp_api_client_test3.c:3: > > /usr/include/vppinfra/string.h:92:34: error: expected > ';', ',' or ')' > > before 'dst' > > clib_memcpy_fast (void *restrict dst, const void > *restrict src, size_t n) > > ^ > > [root@8f57181df3a1 vpp_c_api_examples]# vim > /usr/include/vppinfra/clib.h > > +43 > > [root@8f57181df3a1 vpp_c_api_examples]# vim > /usr/include/vppinfra/clib.h > > +43 > > [root@8f57181df3a1 vpp_c_api_examples]# gcc --version > > gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-44) > > Copyright (C) 2015 Free Software Foundation, Inc. > > This is free software; see the source for copying > conditions. There is NO > > warranty; not even for MERCHANTABILITY or FITNESS FOR > A PARTICULAR > > PURPOSE. > > > > [root@8f57181df3a1 vpp_c_api_examples]# > > > > > > ----------------- > > > > c -code > > ---------------- > > > > > > #include<stdio.h> > > #include<stdlib.h> > > #include <vlibapi/api.h> > > #include <vlibmemory/api.h> > > #include <vpp/api/vpe_msg_enum.h> > > > > #define vl_typedefs > > #define vl_endianfun > > #include <vpp/api/vpe_all_api_h.h> > > #undef vl_typedefs > > #undef vl_endianfun > > > > int main() > > { > > char *name = "vpp-test-app"; > > > > clib_mem_init_thread_safe (0, 64ULL << 20); > > > > if (vl_client_api_map("/vpe-api")) > > { > > printf("unable to map....\n"); > > goto quit; > > } > > if (vl_client_connect("vpp-test-app", 0, 32) < 0) > > { > > printf("unable to connect \n"); > > vl_client_api_unmap(); > > goto quit; > > } > > printf("successfully connected... \n"); > > quit: > > return 0; > > } > > > > > > ------------ > > > > > > Can you please suggest what can i be doing worng ? > > > > > > Thanks, > > Regards, > > Venu > > > > > > On Thu, 30 Sept 2021 at 13:21, <otr...@employees.org > <mailto:otr...@employees.org> > > <mailto:otr...@employees.org > <mailto:otr...@employees.org> > > wrote: > > > > > > Hi Venu, > > > > > Any examples for VAPI shared to use binary > APIs ? > > > > Try this for a start: > > https://git.fd.io/vpp/tree/src/vpp- > api/vapi/vapi_c_test.c > > > > Cheers, > > Ole > > > > > > > > >
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