[asan] migrate runtime from llvm

[Wei Mi]

David, I put the m4 subdir under libasan because once I use the .m4
files (libtool.m4  lt~obsolete.m4  ltoptions.m4  ltsugar.m4
ltversion.m4) and ltmain.sh under $topsrcdir, the problem that a bad
libtool was generated under
$topbuilddir/x86_64-unknown-linux-gnu/libasan you met yesterday
appeared.  That is why I had to generate the new libtool m4 files and
ltmain.sh using libtoolize.

Thanks,
Wei.

On Fri, Oct 19, 2012 at 10:16 AM, Xinliang David Li <davidxl@google.com> wrote:
> I tried it, and this version works for me.
>
> Your probably do not need to add the m4 subdir under libasan.  The
> required m4 files are either in .. or ../config dir. See how
> libmudflap does it.
>
> Other than that, if there are no other comments, the change is good to
> check into the branch. Remaining bugs can always be found and fixed
> later.
>
> thanks,
>
> David
>
>
>
> On Thu, Oct 18, 2012 at 8:04 PM, Wei Mi <wmi@google.com> wrote:
>> Hi,
>>
>> David cought a problem in the last patch when he tries to built
>> libasan. The problem was that an incomplete libtool under libasan
>> build directory was generated. The cause is that the old patch used an
>> old ltmain.sh to generate libtool. I fix it and attach a new patch.
>> And the new patch move -lpthread and -ldl to libasan LDFLAGS.
>>
>> Thanks,
>> Wei.