On Mon, Oct 19, 2020 at 4:34 PM Bruce Richardson <bruce.richard...@intel.com> wrote:
> On Mon, Oct 19, 2020 at 04:17:36PM +0300, Ivan Serdyuk wrote: > Hi Ivan > Hello, Bruce. > Why are you exporting these CPP and CXX flags? The CXX flags will have no > effect on the DPDK build as it does not use c++ code. > Probably my mistake. > > > and got such issues: > > > > > > > [213/2379] Compiling C object 'lib/76b5a35@@rte_bitratestats@sta > > > /librte_bitratestats_rte_bitrate.c.o'. > > > clang-11: warning: argument unused during compilation: '-stdlib=libc++' > > > [-Wunused-command-line-argument] > > > [219/2379] Compiling C object 'lib/76b5a35@@rte_cfgfile@sta > > > /librte_cfgfile_rte_cfgfile.c.o'. > > > clang-11: warning: argument unused during compilation: '-stdlib=libc++' > > > [-Wunused-command-line-argument] > > > [222/2379] Linking target lib/librte_acl.so.20.0.3. > > > FAILED: lib/librte_acl.so.20.0.3 > > > clang -o lib/librte_acl.so.20.0.3 'lib/76b5a35@@rte_acl@sta > /librte_acl_acl_bld.c.o' > > > 'lib/76b5a35@@rte_acl@sta/librte_acl_acl_gen.c.o' 'lib/76b5a35@ > > > @rte_acl@sta/librte_acl_acl_run_scalar.c.o' 'lib/76b5a35@@rte_acl@sta > /librte_acl_rte_acl.c.o' > > > 'lib/76b5a35@@rte_acl@sta/librte_acl_tb_mem.c.o' 'lib/76b5a35@ > @rte_acl@sta/librte_acl_acl_run_sse.c.o' > > > -Wl,--as-needed -Wl,--no-undefined -Wl,-O1 -shared -fPIC > -Wl,--start-group > > > -Wl,-soname,librte_acl.so.20.0 -Wl,--no-as-needed -pthread -lm -ldl > > > lib/librte_eal.so.20.0.3 lib/librte_kvargs.so.20.0.3 > > > lib/librte_telemetry.so.20.0.3 -Wl,--end-group > > > > -Wl,--version-script=/home/oceanfish81/dpdk-20.08/lib/librte_acl/rte_acl_version.map > > > '-Wl,-rpath,$ORIGIN/' > > > -Wl,-rpath-link,/home/oceanfish81/dpdk-20.08/build-clang/lib > > > /usr/bin/ld: lib/76b5a35@@rte_acl@sta/librte_acl_rte_acl.c.o:(. > data.rel.ro+0x18): > > > undefined reference to `rte_acl_classify_avx2' > > > clang-11: error: linker command failed with exit code 1 (use -v to see > > > invocation) > > > [225/2379] Generating bbdev.sym_chk with a meson_exe.py custom command. > > > ninja: build stopped: subcommand failed. > > > > > > I am using > > > > > $ clang --version > > > clang version 11.0.0 (https://github.com/llvm/llvm-project.git > > > 0160ad802e899c2922bc9b29564080c22eb0908c) > > > Target: x86_64-unknown-linux-gnu > > > > > > I am working under Virtualbox, currently. My host CPU doesn't have any > AVX > > support - and there is no guest emulation support for them. Could I > bypass > > this somehow, while building librte, as a dependency? > > > > I'm not sure exactly what the problem is here, because DPDK should build > fine on any system that has SSE4.2 support - no AVX2 support is required. > To test, I've done a build of DPDK on an old Core i7 machine with AVX, but > not AVX2, and it built fine with clang 8 (this was using FreeBSD 12), > including the ACL library. > Here is what I have here: $ cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 23 > model name : Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz > stepping : 10 > microcode : 0x60b > cpu MHz : 2666.620 > cache size : 3072 KB > physical id : 0 > siblings : 2 > core id : 0 > cpu cores : 2 > apicid : 0 > initial apicid : 0 > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat > pse36 clflush mmx fxsr sse sse2 ht syscall nx lm constant_tsc rep_good nopl > cpuid tsc_known_freq pni ssse3 sse4_1 x2apic hypervisor lahf_lm pti > bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds > swapgs itlb_multihit > bogomips : 5333.24 > clflush size : 64 > cache_alignment : 64 > address sizes : 36 bits physical, 48 bits virtual > power management: > processor : 1 > vendor_id : GenuineIntel > cpu family : 6 > model : 23 > model name : Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz > stepping : 10 > microcode : 0x60b > cpu MHz : 2666.620 > cache size : 3072 KB > physical id : 0 > siblings : 2 > core id : 1 > cpu cores : 2 > apicid : 1 > initial apicid : 1 > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat > pse36 clflush mmx fxsr sse sse2 ht syscall nx lm constant_tsc rep_good nopl > cpuid tsc_known_freq pni ssse3 sse4_1 x2apic hypervisor lahf_lm pti > bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds > swapgs itlb_multihit > bogomips : 5333.24 > clflush size : 64 > cache_alignment : 64 > address sizes : 36 bits physical, 48 bits virtual > power management: > > Can you try deleting your build folder and configure it again without > overriding the environmental vars? If it still fails, please paste the > errors here, and also try configuring the build with "-Dmachine=default" to > turn off detecting the present instruction sets and assume an SSE4 > baseline. > I just did as you prosed. Here is <https://gist.github.com/advancedwebdeveloper/437c2d81316f830f37e3381933f95ab6> my output. Something is missing, btw. I am curious why you haven't tried to use http://compiler-rt.llvm.org/, if there is a reason, instead of GCC's libraries. I would ask the similar question against https://llvm.org/docs/Proposals/LLVMLibC.html Hence https://llvm.org/docs/Proposals/LLVMLibC.html . I am compiling with Ninja, currently - so I shall report whether everything was compiled. Ivan
