similar to: LTO, llvm-(nm, ar, ranlib)

Hi all, I was trying to use LTO facility of LLVM to reduce the footprint of Clang itself. I build the ld-gold  and LLVMgold.so as described at [1] and then set the environment as described too. However, had to add the path for plugin manually as Clang was not able pass it to ld automatically. Following is the setting I used before starting to build (small foot Clang. CXX=clang++ -flto

I guess I miss-interpreted the text in [2]. It talks about the optimizations are hindered if the compiler driver invokes link time optimizer "separately". I found that all files compiled are in bc format. Also in library archives, the embedded files were in bitcode format. So the gold linker and LLVMgold plugin are indeed working fine. However, there is still question over only 6% gain

bfd linker 2.26 works fine with LLVMgold.so. As I mentioned in a previous email, 2.26 ar and ranlib also works fine as long as LLVMgold.so is put in a path binutils know about : $(bindir)/../lib/bfd-plugins/ David On Sun, Oct 2, 2016 at 3:59 AM, Carsten Mattner <carstenmattner at gmail.com> wrote: > On Sun, Oct 2, 2016 at 6:52 AM, Teresa Johnson <tejohnson at google.com> >

Dear all, I'm trying to use the gold plugin to make it easier to generate LLVM bitcode from complex applications. I did the steps mentioned on "http://llvm.org/docs/GoldPlugin.html". Both linking and LLVM generation seem to work properly, however when using the tool ar, the symbol table is lost. "no archive symbol table (run ranlib)". I'm using LLVM 2.9, Ubuntu 10.10,

On 11-06-15 09:03 AM, Istvan Haller wrote: > Dear all, > I'm trying to use the gold plugin to make it easier to generate LLVM bitcode > from complex applications. I did the steps mentioned on > "http://llvm.org/docs/GoldPlugin.html". Both linking and LLVM generation seem to > work properly, however when using the tool ar, the symbol table is lost. "no > archive

Hi, I fixed error by using different version of ld with LLVM 2.7. I used ld.gold that comes with Ubuntu 10.04. Here is the version info: sangmin at sangmin-desktop:/tmp$ ld -v GNU gold (GNU Binutils for Ubuntu 2.20.1-system.20100303) 1.9 My experience of gold plugin is as follows: LLVM 2.7 (with libLLVMgold.so) + ld 2.20.1 (from Ubuntu 10.04) : O LLVM 2.7 (with libLLVMgold.so) + ld 2.21.51

On Mon, Oct 3, 2016 at 10:54 PM, Teresa Johnson <tejohnson at google.com> wrote: > > Aha - finally reproduced! The difference is using ld.bfd not > ld.gold. With that I get the same failure (using 3.9 to build 3.9 > sources): Thanks a lot! [...] > I am not sure what the official support story is for LLVMgold.so and > ld.bfd. As mentioned earlier, the LLVM site indicates

The configuration we’re mentioning is a 2-stage bootstrap: You need first to build without LTO your own clang, and then use it for the LTO build. — Mehid > On Sep 20, 2016, at 10:17 AM, Michael Kruse <llvmdev at meinersbur.de> wrote: > > I am the author of Polly's/ISL's platform tests and could reproduce > the problem on my system with this error message: > >

Hi all, I got an error from the gold plugin example in the following link: http://llvm.org/docs/GoldPlugin.html#example1 Here is the error message: sangmin at sangmin-desktop:/tmp$ llvm-gcc -use-gold-plugin a.a b.o -o main /usr/bin/ld: error: a.a: no archive symbol table (run ranlib) /usr/bin/ld: /usr/lib/crt1.o:(.text+0x18): error: undefined reference to 'main' /usr/bin/ld: b.o: in

On 4/23/19 2:59 PM, Thomas K?nig wrote: > Hi, > > there can be an issue with recent gcc where the system-installed "ar" > and "ranlib" commands cannot handle LTO binaries.? On compilation, this > manifests itself with error messages claiming that they need extra > plugins. > > This can be fixed by using the command line > > $ AR=gcc-ar

Hi, there can be an issue with recent gcc where the system-installed "ar" and "ranlib" commands cannot handle LTO binaries. On compilation, this manifests itself with error messages claiming that they need extra plugins. This can be fixed by using the command line $ AR=gcc-ar RANLIB=gcc-ranlib ./configure --enable-lto so it is not a big issue, but it would still be nicer

I have gold from cvs, and llvm-gcc/llvm from svn. My platform is Ubuntu 9.04 x86_64. I've configured llvm-gcc with "--enable-multilib". When compiling the LTO example from http://llvm.org/docs/LinkTimeOptimization.html I have no problems with 64-bit compilation, but get the following with -m32. luked at node:~/tests/lto$ make USE32=1 llvm-gcc -m32 -c -o main.o main.c llvm-gcc

On Tue, Sep 27, 2016 at 11:17 PM, Teresa Johnson <tejohnson at google.com> wrote: > Sure, I will try this and let you know. Unfortunately, though, I > have another big work commitment that is going to eat up most of my > time through Thu, although I may be able to find some time to try > it. No worries, if I get around it before you do, I will :). > I think so - what is

On Tue, Mar 22, 2011 at 9:19 AM, Rafael Avila de Espindola < rafael.espindola at gmail.com> wrote: > On 11-03-21 10:35 PM, Sangmin Park wrote: > > Hi, > > > > I fixed error by using different version of ld with LLVM 2.7. > > I used ld.gold that comes with Ubuntu 10.04. > > Here is the version info: > > > > sangmin at sangmin-desktop:/tmp$ ld -v

Hi Tomas, > On 4/23/19 2:59 PM, Thomas K?nig wrote: >> Hi, >> >> there can be an issue with recent gcc where the system-installed "ar" >> and "ranlib" commands cannot handle LTO binaries.? On compilation, this >> manifests itself with error messages claiming that they need extra >> plugins. > Thanks for the report. What was the

On 1 August 2012 23:00, Sun, Rui <rui.sun at intel.com> wrote: > Hi, > > > > I am trying to use LLVM LTO. I read http://llvm.org/docs/GoldPlugin.html and > have some questions. Could anyone help? > > > > 1. Can LLVMgold.so work with BFD LD instead of gold? In the > description of changes in binutils 2.20, “* The plugin target has been added > to bfd.

Hi, I am trying to use LLVM LTO. I read http://llvm.org/docs/GoldPlugin.html and have some questions. Could anyone help? 1. Can LLVMgold.so work with BFD LD instead of gold? In the description of changes in binutils 2.20, "* The plugin target has been added to bfd. It can load the same shared objects used by gold and uses them to provide basic support for new file formats.".

Quick update: the previous patch only worked for static linking; this version should work for both static and dynamic linking. I'm not going to send any more updated patches to this list, but please feel free to e-mail me off-list, and I'll be happy to share any updates I have at any point in the future. -Hal ----- Original Message ----- > Rafael, Rui, > > This is obviously

You should probably send them for review/inclusion in bfd. On 11 October 2013 12:39, Hal Finkel <hfinkel at anl.gov> wrote: > Quick update: the previous patch only worked for static linking; this version should work for both static and dynamic linking. > > I'm not going to send any more updated patches to this list, but please feel free to e-mail me off-list, and I'll be

On 11-03-21 10:35 PM, Sangmin Park wrote: > Hi, > > I fixed error by using different version of ld with LLVM 2.7. > I used ld.gold that comes with Ubuntu 10.04. > Here is the version info: > > sangmin at sangmin-desktop:/tmp$ ld -v > GNU gold (GNU Binutils for Ubuntu 2.20.1-system.20100303) 1.9 > > My experience of gold plugin is as follows: > > LLVM 2.7 (with