[libc++][patch] Sort out common Linux linking issues.

[İsmail Dönmez]

Hi,

Would be nice to get this reviewed. Its gets tiring to put -lc++abi
whenever I need to do -stdlib=libc++

Thanks!


On Wed, Apr 9, 2014 at 3:52 PM, Sebastian Redl <
sebastian.redl at getdesigned.at> wrote:

>
> Gentle ping on this. Haven't heard anything except that Marshall likes the
> documentation.
>
> On Apr 2, 2014, at 10:54, Dmitri Gribenko wrote:
>
> > + Sylvestre Ledru
> >
> > On Tue, Apr 1, 2014 at 6:37 PM, Sebastian Redl
> > <sebastian.redl at getdesigned.at> wrote:
> >> Following the recent inquiry and David Chisnall's advice, I have created
> >> a patch that makes libc++ work a lot smoother on Linux. It allows a
> >> plain "clang++ -stdlib=libc++" command line to work no matter what ABI
> >> library is used, and fixes the linking errors I encountered.
> >>
> >> However, I have absolutely no idea what it does on other platforms.
> >>
> >> Log Message:
> >>
> >>    Sort out common Linux linking issues.
> >>
> >>    Using libc++ on Linux was problematic because using libsupc++ didn't
> >> pull in
> >>    all necessary symbols, whereas linking against a dynamic ABI library
> >> required
> >>    the user to explicitly link against the ABI library.
> >>
> >>    This patch adds a new property, LIBCXX_CXX_ABI_LINK, that can be set
> >> to dynamic
> >>    (the default) or static. In dynamic mode, it links against the
> >> dynamic library,
> >>    and substitutes its unversioned .so file with a linker script that
> links
> >>    against both libc++ and the ABI library. In static mode, it uses
> >> --whole-archive
> >>    to force inclusion of the entire ABI library into the libc++.so.
> >>
> >>    It also automatically uses libstdc++ for dynamic mode and libsupc++
> >> for static
> >>    mode if either was selected; the two ABI names are now synonyms.
> >>
> >> _______________________________________________
> >> cfe-commits mailing list
> >> cfe-commits at cs.uiuc.edu
> >> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
> >>
> >
> >
> >
> > --
> > main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
> > (j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at gmail.com>*/
>
>
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