[LLVMdev] Building uclibc ...

[Dound]

On 9/12/07, Chris Lattner <sabre at nondot.org> wrote:
>
> On Wed, 12 Sep 2007, Dound wrote:
> > I am trying compile a libc with llvm (currently uclibc).  I am able to
> > compile uclibc by changing the Rules.mak to use llvm-gcc, llvm-ar,
> llvm-ad,
> > and not using strip.  (I also use the --emit-llvm flag for
> llvm-gcc).  When
> > I run llvm-nm on libc.a (or try to use libc.a) I run into problems.  For
> > example, strlen is not defined -- llvm-nm shows that strlen.os has
> > __GI_strlen while if I compile with the "normal" tools (gcc, ar, ...)
> > strlen.os has __GI_strlen as well as strlen listed (both have the symbol
> > value 00000000).
> >
> > Any ideas why the archive I create with llvm doesn't define the strlen
> (and
> > most other) symbols but does define the __GI_strlen?
>
> Can you paste the output of nm for the native GCC version?  It's possible
> that uclibc is using aliases for these, and it seems very likely that
> llvm-nm just isn't printing aliases at all.  Anton, do you want to see if
> llvm-nm should be extended by this?


Sure, thanks for your thoughts ... it is a little long so I'll just include
links to the nm output:

nm on the gcc generated native archive:
http://www.dound.com/tmp/nm-native.txt
llvm-nm on the llvm generated archive: http://www.dound.com/tmp/nm-llvm.txt

> I'm sure it is obvious by now, but I am pretty new to LLVM -- thanks in
> > advance for your help and time!
>
> Happy to help!
>
> > PS.  Also, out of curiosity, was someone able to successfully compile
> all or
> > part of glibc?  I saw it was on the open projects page a few years ago
> > (thanks to the old CVS data) but could not find the revision in which it
> was
> > removed from that list.  I suspect that because it was removed, perhaps
> > someone else has figured it out and I could see what they did and try to
> > compile it myself?
>
> I don't know of anyone who has tried.  If you try it and run into bugs,
> please file bugzilla entries!
>
> -Chris


Thanks! ~ David
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20070912/f0b7e5ed/attachment.html>