[llvm-dev] (Thin)LTO llvm build

Mehdi Amini via llvm-dev
Fri, 30 Sep 2016 17:06:37 -0000

> On Sep 30, 2016, at 9:55 AM, Teresa Johnson <tejohnson at google.com>
wrote:
>
>
>
> On Fri, Sep 30, 2016 at 9:35 AM, Teresa Johnson <tejohnson at google.com
<mailto:tejohnson at google.com>> wrote:
> I just built a stage-1 compiler from the 3.9 release bits and built the
lldb from head sources which worked fine. Let me try again using 3.9 build
compiler to build 3.9 bits. Teresa
>
> Nevermind - it looks like I didn't actually get the 3.9 bits. Anyone
know how to get 3.9 via git or git-svn? Typically I use git svn like so to get
trunk bits:
>
>     git clone http://llvm.org/git/llvm.git
<http://llvm.org/git/llvm.git> llvm_${num}
>     cd llvm_${num}

Switch branch: git checkout release_39 I think

(Try `git ls-remote origin` if needed)

—
Mehdi


>     git svn init https://llvm.org/svn/llvm-project/llvm/trunk
<https://llvm.org/svn/llvm-project/llvm/trunk> --username=tejohnson
>     git config svn-remote.svn.fetch :refs/remotes/origin/master
>     git svn rebase -l
>
> I attempted to get 3.9 bits by modifying this slightly (the git svn init
command):
>
>     git clone http://llvm.org/git/llvm.git
<http://llvm.org/git/llvm.git> llvm_39_${num}
>     cd llvm_39_${num}
>     git svn init https://llvm.org/svn/llvm-project/llvm/branches/release_39
<https://llvm.org/svn/llvm-project/llvm/branches/release_39>
--username=tejohnson
>     git config svn-remote.svn.fetch :refs/remotes/origin/master
>     git svn rebase -l
>
> However, I still see latest trunk.
>
> Teresa
>
>
> On Tue, Sep 27, 2016 at 2:55 PM, Teresa Johnson <tejohnson at google.com
<mailto:tejohnson at google.com>> wrote:
>
>
> On Tue, Sep 27, 2016, 2:38 PM Carsten Mattner <carstenmattner at
gmail.com <mailto:carstenmattner at gmail.com>> wrote:
> On Tue, Sep 27, 2016 at 11:17 PM, Teresa Johnson <tejohnson at
google.com <mailto: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 confusing me is that your cmake command is
> > specifying the same $PREFIX for both the install destination and the
> > source of the llvm-ar/llvm-ranlib that will be used in the new
> > build. Should the llvm-ar/llvm-ranlib in the cmake command use your
> > moved-to PREFIX instead?
>
> Only if 'ninja install` would reference the two executables. If
that's
> case, and I haven't gotten that far yet due to ThinLTO not finishing,
> I'll consider copying those to the local build tree first.
>
> > Can you nm the .so files in your lib dir and see if any reference
> > __morestack?
>
> $ for so in lib/*.so; do echo $so ; nm $so|grep __morestack;done
> lib/BugpointPasses.so
> lib/libclang.so
> lib/libgomp.so
> lib/libiomp5.so
> lib/liblldb.so
>                  U __morestack
> lib/libLTO.so
> lib/libomp.so
> lib/LLVMgold.so
> lib/LLVMHello.so
> lib/LLVMPolly.so
>
> Looks like liblldb.so does. Does that explain anything?
>
> Interesting, it doesn't in my build. Let me think about what might
trigger that difference...
>
>
>
> --
> Teresa Johnson |	 Software Engineer |	 tejohnson at google.com
<mailto:tejohnson at google.com> |	 408-460-2413 <tel:408-460-2413>
>
>
> --
> Teresa Johnson |	 Software Engineer |	 tejohnson at google.com
<mailto:tejohnson at google.com> |	 408-460-2413

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