[llvm-bugs] [Bug 33245] New: [ThinLTO] In LTO personality function missing.

via llvm-bugs llvm-bugs at lists.llvm.org
Wed May 31 05:46:09 PDT 2017


            Bug ID: 33245
           Summary: [ThinLTO] In LTO personality function missing.
           Product: lld
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: ELF
          Assignee: unassignedbugs at nondot.org
          Reporter: wallbraker at gmail.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 18550
  --> https://bugs.llvm.org/attachment.cgi?id=18550&action=edit
Test case, just run run.sh to demonstrate.

As it says in the subject, the linker is not able to find the personality
function when linking a program.

What I am doing here is running ThinLTO with the personality function inside of
the LTO bitcode files, not externally. If I move the personality function to a
o binary it fixes the problem. The same bug happens if you remove the

Running the attached testcase I get the error below. 

  $ ./run.sh
  /home/jakob/bin/ld.lld: error: undefined symbol: vrt_eh_personality_v0
  >>> referenced by main
  >>>               lto.tmp:(.eh_frame+0x13)
  clang: error: linker command failed with exit code 1 (use -v to see

Cheers, Jakob.

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