On Tue, Dec 18, 2018 at 1:50 AM Benedikt T <benj...@gmail.com> wrote: > > Ok, compilation went through after I ran the make command again. Seems like > this run the debug data is omitted. However, setting the compiler to GCC > yields the same error: > > ~/llvm-install/bin# > LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/root/llvm-install/lib:/root/llvm-install/lib64/ > ./go > ./go: symbol lookup error: /root/llvm-install/lib64/libgo.so.8svn: undefined > symbol: __get_cpuid_count > > The file itself is compiled with gcc as seen in the comment section of the > binary: > root@llvmbuilder1544639155868beforemake-s-1vcpu-2gb-fra1-01:~/llvm-install/bin# > objdump -s --section .comment go > > go: file format elf64-x86-64 > > Contents of section .comment: > 0000 00474343 3a202855 62756e74 7520352e .GCC: (Ubuntu 5. > 0010 342e302d 36756275 6e747531 7e31362e 4.0-6ubuntu1~16. > 0020 30342e31 30292035 2e342e30 20323031 04.10) 5.4.0 201 > 0030 36303630 3900 60609. > > Is this version still too low? What am I missing here?
You are using GCC 5.4. You need to use GCC 6 or later. Ian > On Tuesday, December 18, 2018 at 12:57:29 AM UTC+1, Benedikt T wrote: >> >> yeah, debug info is still in there... >> llvm-ar: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), >> dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux >> 3.2.0, BuildID[sha1]=c2ad3e2441ef2e4afd449627cc6a22d4b256f450, with >> debug_info, not stripped >> >> Is this supposed to happen? >> >> On Tuesday, December 18, 2018 at 12:55:13 AM UTC+1, Benedikt T wrote: >>> >>> Hi! >>> >>> it's kind of odd. Using gcc for compilation leads to this error during >>> compilation: >>> tools/lto/CMakeFiles/LTO.dir/build.make:278: recipe for target >>> 'lib/libLTO.so.8svn' failed >>> make[2]: *** [lib/libLTO.so.8svn] Error 1 >>> make[2]: *** Deleting file 'lib/libLTO.so.8svn' >>> CMakeFiles/Makefile2:20689: recipe for target >>> 'tools/lto/CMakeFiles/LTO.dir/all' failed >>> make[1]: *** [tools/lto/CMakeFiles/LTO.dir/all] Error 2 >>> Makefile:149: recipe for target 'all' failed >>> make: *** [all] Error 2 >>> >>> This seems to be related to this: >>> https://groups.google.com/forum/#!topic/llvm-dev/KH3DHQo0A38 >>> >>> Does setting those flags disable the -DCMAKE_BUILD_TYPE=Release >>> -DLLVM_USE_LINKER=gold flags? It seems the built files are quite large... >>> (hinting at additional debug info) >>> >>> On Monday, December 17, 2018 at 4:20:07 PM UTC+1, Than McIntosh wrote: >>>> >>>> >>>> Thanks for reporting this problem. >>>> >>>> As Ian said, one of the go library sources includes <cpuid.h>, and then >>>> expects to see an inline definition of that routine. >>>> >>>> I poked around a little and it looks as though versions of clang prior to >>>> 5.0 do provide a definition of <cpuid.h>, but they don't define >>>> __get_cpuid_count -- that seems to have been added later in this commit. >>>> >>>> Do you have a later version of clang that you could use as your build >>>> compiler (5.0 later)? Or could you use GCC instead? Either of these should >>>> take care of this problem. In you cmake invocation you'll want to use >>>> >>>> cmake ... >>>> -DCMAKE_ASM_COMPILER=/usr/bin/gcc \ >>>> -DCMAKE_CXX_COMPILER=/usr/bin/g++ \ >>>> -DCMAKE_C_COMPILER=/usr/bin/gcc \ >>>> >>>> Or equivalent. >>>> >>>> I will add a note to the FAQ on this, since others may also run into it. >>>> >>>> Thanks, Than >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> On Sun, Dec 16, 2018 at 7:17 PM Ian Lance Taylor <ia...@golang.org> wrote: >>>>> >>>>> [ + thanm ] >>>>> >>>>> On Sat, Dec 15, 2018 at 6:56 AM <ben...@gmail.com> wrote: >>>>> > >>>>> > I'm trying to use the current gollvm build, but it seems there is a >>>>> > symbol error. Probably that symbol is absent in the libgo release? >>>>> > Anyone had a similar problem or an idea how I can fix that? >>>>> >>>>> The libgo sources expect __get_cpuid_count to be defined by the >>>>> compiler intrinsics header <cpuid.h>. This is true for GCC. The >>>>> reference to the symbol is in libgo/go/internal/cpu/cpu_gccgo.c. >>>>> >>>>> Than: does the LLVM version of <cpuid.h> define __get_cpuid_count? If >>>>> not, I guess we need to tweak cpu_gccgo.c. >>>>> >>>>> Ian > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
