[llvm-dev] Regd LLvm bolt with clang

[Bose, Priyanka via llvm-dev]

Hi,

We wanted to experiment as to how we can use the BOLT optimization from LLVM on our Android Platforms.
We referred to the wiki from Facebook that speaks of Bolt
https://github.com/facebookincubator/BOLT

So I was using now the linker flag : "Wl,--emit-relocs"  in the instrumented mode to compile android module , for instance here "libc".
But the build fails with the llvm clang toolchain on android :
============================
FAILED: out/soong/.intermediates/bionic/libc/libc/android_x86_core_shared/libc.so prebuilts/clang/host/linux-x86/clang-4691093/bin/clang++
.....
.....
-Wl,--no-undefined -Wl,--hash-style=gnu -Wl,--emit-relocs -Wl,--hash-style=both -m32 -Wl,--version-script,bionic/libc/libc.x86.map
prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/x86_64-linux-android/bin/ld: internal error in do_layout, at /buildbot/src/android/gcc/toolchain/build/../binutils/binutils-2.27/gold/object.cc:1821
clang-6.0: error: linker command failed with exit code 1 (use -v to see invocation)
==============================

I am using android clang prebuilts : "clang-4691093". Does the clang based llvm compiler need any special changes to use this compiler relocation compiler flag?

Best Regards
Priyanka


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20190820/69174b7a/attachment-0001.html>