similar to: [LLVMdev] [LLVM] What has happened to LLVM bitcode archive support?

On 20 December 2013 05:39, Daniel Liew <daniel.liew at imperial.ac.uk> wrote: > Hi Rafael and other LLVM devs, > > I'm currently upgrading a project that uses LLVM that links a bitcode > archive (a C library) with a module. Originally we used > Linker::LinkInFile() but that was removed by r172749. So I started > looking for an alternative and I found >

Hi Rafael, On 20 Dec 2013, at 14:30, Rafael Espíndola wrote: > On 20 December 2013 05:39, Daniel Liew <daniel.liew at imperial.ac.uk> wrote: >> Hi Rafael and other LLVM devs, >> >> I'm currently upgrading a project that uses LLVM that links a bitcode >> archive (a C library) with a module. Originally we used >> Linker::LinkInFile() but that was removed

>> Therefore LLVM is still supporting runtime libraries that consist of llvm >> bitcode files (even if the format is now different) > > runtime? It is still possible to build .a files if that is what you men. Sorry I haven't explained very clearly. The tool that I work on is an interpreter of LLVM IR and when the tool runs, it links in an archive of bitcode modules into the

Hi Rafael and other LLVM devs, I'm currently upgrading a project that uses LLVM that links a bitcode archive (a C library) with a module. Originally we used Linker::LinkInFile() but that was removed by r172749. So I started looking for an alternative and I found Archive::findModulesDefiningSymbols() which looked very promising as it would allow me to very easily implement linking a bitcode

> We are going this way, yes. You've confused me a bit here ( maybe I was being too vague ) Okay so I understand thst the old LLVM specific archive format is now gone. However it seems you are allowing LLVM bitcode files ( I assume that's what you mean by "IL" - does that stand for "intermediate language"? It's not in [1] ) to be placed inside the more

On Tue, Dec 17, 2013 at 10:31:31AM +0000, Daniel Liew wrote: > Hi, > > We're currently upgrading KLEE to work with LLVM >=3.3 and we've hit a problem. > > It seems r172749 removed support for linking a bitcode archive into a > module. KLEE unfortunately depends on this to link in its runtime ( > which amongst other things provides a C library [5] ). > > A

Hi, We're currently upgrading KLEE to work with LLVM >=3.3 and we've hit a problem. It seems r172749 removed support for linking a bitcode archive into a module. KLEE unfortunately depends on this to link in its runtime ( which amongst other things provides a C library [5] ). A first attempt at linking in a bitcode archive ourselves can be seen in [1]. This approach does not work

> Excuse me for the diversion but, is that interpreter of LLVM IR available > somewhere? Details on how it works, performance, etc? I'd be interested Yes it is available. The tool (KLEE [1]) is actually a lot more than an interpreter (although it can be used as one). KLEE allows you to mark certain variables (e.g. program inputs) as "symbolic". What this means is that the

Hi everyone, I want to perform whole-program analysis for apache httpd using httpd's original autoconf system so that I need to generate a single bitcode file. So I follow the instructions in LLVM document on gold plugin http://llvm.org/docs/GoldPlugin.html#lto-how-to-build. However, when running a simple program using LTO, clang fails to link the object file with the LLVM bitcode.

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,

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

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

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

Hi Duncan, > 4.gcc -g -O2 -o .libs/mergedexe .libs/mergedbc.s -pthread > -Wl,--export-dynamic .libs/lib1.a -lssl -lcrypto -ldl -pthread .libs/lib2.so >if you pass -O4 rather than -O2 to clang I think it will in essence do this all >for you already. It might even do the link time optimization for you at -O2 >even, I'm not sure. No, if I use clang for producing

Hi, unfortunately, my build somehow hangs when linking clang binary and my system is in an unusable state. My toolchain is clang-3.8, gold-1.11 and LLVMgold.so from binutils v2.26.1 (both selfmade) and LTO-flag is enabled. My buildsystem uses cmake-3.6.0 and ninja-1.7.1 (both prebuilt). I have 52 last steps left in my 3rd build. My Linux-kernel is v3.13.0-92 from official Ubuntu repositories.

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.".

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've been following the instructions on how to use the LLVM Gold plugin at http://llvm.org/docs/GoldPlugin.html while building an multiple versions of WebKit. The documentation hasn't been updated since 2010 and hasn't really matched my experiences, so I'd like to ask if I'm doing these steps incorrectly. What I'm trying to do is force all compilation steps to

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