<div dir="ltr">+kcc<div><br></div><div>AFAIU there are recent improvements in building glibc with Clang. Kostya, what is the current status of building upstream glibc?</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 29, 2014 at 9:33 AM, Sahoo, Swarup Kumar <span dir="ltr"><<a href="mailto:ssahoo2@illinois.edu" target="_blank">ssahoo2@illinois.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr" style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
<div style="direction:ltr;font-family:Tahoma;color:#000000;font-size:10pt">Hi Joshua,<br>
<br>
uClibc can be compiled with clang. You can try to use it if it works for you.<br>
<br>
Thanks,<br>
Swarup.<br>
<br>
<div style="font-family:Times New Roman;color:#000000;font-size:16px">
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<div style="direction:ltr"><font color="#000000" face="Tahoma"><b>From:</b> <a href="mailto:llvmdev-bounces@cs.uiuc.edu" target="_blank">llvmdev-bounces@cs.uiuc.edu</a> [<a href="mailto:llvmdev-bounces@cs.uiuc.edu" target="_blank">llvmdev-bounces@cs.uiuc.edu</a>] on behalf of Joshua Tuttle [<a href="mailto:jtuttle@i-a-i.com" target="_blank">jtuttle@i-a-i.com</a>]<br>
<b>Sent:</b> Monday, September 29, 2014 9:28 AM<br>
<b>To:</b> <a href="mailto:llvmdev@cs.uiuc.edu" target="_blank">llvmdev@cs.uiuc.edu</a><br>
<b>Subject:</b> [LLVMdev] Compiling glibc with clang/LLVM<br>
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<p>Hey all,</p>
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<p>I was wondering if clang/LLVM has support to compile glibc in its entirety? The only thing I could find of recent was this thread saying the only way it could really be done is to use the dragonegg plugin with gcc...
</p>
<p><a href="https://groups.google.com/forum/#!topic/llvm-dev/pmZYVNTrVYQ" target="_blank">https://groups.google.com/forum/#!topic/llvm-dev/pmZYVNTrVYQ</a></p>
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<div><span><em> [LLVMdev] clang/llvm with glibc</em></span><em>
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<div><em>8 posts by 5 authors</em></div>
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<p><em>This question has been asked occasionally with no positive responses.</em></p>
<p><em>Has anybody had success compiling glib with clang/llvm? If so, can you share any details?</em><br>
</p>
<p><em>If not, are there any good libc replacements with more complete functionality than newlib?</em><br>
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<p><em>Thanks, dave</em><br>
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<td align="left" valign="top"><em></em><span><span><em>JF Bastien</em></span></span><em>
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<div><em></em><span><em>Other recipients: </em></span><em></em><span><em></em><span><em><a href="mailto:db....@gmail.com" target="_blank">db....@gmail.com</a>, <a href="mailto:mcgr...@google.com" target="_blank">mcgr...@google.com</a>, <a href="mailto:llv...@cs.uiuc.edu" target="_blank">llv...@cs.uiuc.edu</a></em></span><em>
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<p dir="ltr"><em>Roland says the main blocker for now is support for nested functions, he thinks the rest should be straightforward.
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<p dir="ltr"><em>There was apparently a post to the glibc mailing list about this.
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<em>______________________________</em><u></u><em>_________________</em><br>
<em>LLVM Developers mailing list</em><br>
<em></em><a><em>LLV...@cs.uiuc.edu</em></a><em> </em><a href="http://llvm.cs.uiuc.edu" target="_blank"><em>http://llvm.cs.uiuc.edu</em></a><br>
<em></em><a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev" target="_blank"><em>http://lists.cs.uiuc.edu/</em><u></u><em>mailman/listinfo/llvmdev</em></a><br>
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<td align="left" valign="top"><em></em><span><span><em>Peter Collingbourne</em></span></span><em>
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<div><em></em><span><em>Other recipients: </em></span><em></em><span><em></em><span><em><a href="mailto:db....@gmail.com" target="_blank">db....@gmail.com</a>, <a href="mailto:llv...@cs.uiuc.edu" target="_blank">llv...@cs.uiuc.edu</a></em></span><em>
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<em>It is (almost) possible to compile glibc using DragonEgg -- there </em><br>
<em>are only a handful of patches required (for LLVM and DragonEgg), </em><br>
<em>most of which are now up for review. </em><br>
<em></em><br>
<em>It builds, and most of glibc's test suite currently passes, except </em><br>
<em>for some tests that deal with floating point arithmetic, and some </em><br>
<em>tests which use very obscure GNU as features which I haven't seen </em><br>
<em>used outside the glibc test suite. </em><br>
<em></em><br>
<em>Hopefully within a month or so everything should be upstreamed, but </em><br>
<em>if you're itching for something that works now I can try to find some </em><br>
<em>time to send some WIP patches and instructions. </em><br>
<em></em><br>
<em>Thanks, </em><br>
<em>-- </em><br>
<em>Peter </em><br>
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<div><em></em><span><em>Other recipients: </em></span><em></em><span><em></em><span><em><a href="mailto:j...@google.com" target="_blank">j...@google.com</a>, <a href="mailto:llv...@cs.uiuc.edu" target="_blank">llv...@cs.uiuc.edu</a>, <a href="mailto:mcgr...@google.com" target="_blank">mcgr...@google.com</a></em></span><em>
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<div dir="ltr"><em>Here's a clang bug I filed long ago for it that was closed wontfix:</em>
<div><a href="http://llvm.org/bugs/show_bug.cgi?id=9206" target="_blank"><em>http://llvm.org/bugs/show_bug.</em><u></u><em>cgi?id=9206</em></a></div>
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<div><em></em><span title="Thursday, June 6, 2013 11:34:57 AM UTC-4"><em>6/6/13</em></span><em>
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<div style="overflow:auto"><em>Thanks Peter, </em><br>
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<em>I'll try that path and follow up with you for the patches when I get to that </em>
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<em>point </em><br>
<em></em><br>
<em>Best, dave </em><br>
<em></em><br>
<em></em><br>
<em></em><br>
<em>-- </em><br>
<em>View this message in context: </em><a href="http://llvm.1065342.n5.nabble.com/clang-llvm-with-glibc-tp58309p58336.html" target="_blank"><em>http://llvm.1065342.n5.nabble.</em><u></u><em>com/clang-llvm-with-glibc-</em><u></u><em>tp58309p58336.html</em></a><em>
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<em>Sent from the LLVM - Dev mailing list archive at Nabble.com. </em><br>
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<td align="left" valign="top"><em></em><span><span><em>Rafael Espíndola</em></span></span><em>
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<div><em></em><span><em>Other recipients: </em></span><em></em><span><em></em><span><em><a href="mailto:pe...@pcc.me.uk" target="_blank">pe...@pcc.me.uk</a>, <a href="mailto:llv...@cs.uiuc.edu" target="_blank">llv...@cs.uiuc.edu</a></em></span><em>
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<div><em>> It is (almost) possible to compile glibc using DragonEgg -- there
</em><br>
<em>> are only a handful of patches required (for LLVM and DragonEgg), </em><br>
<em>> most of which are now up for review. </em><br>
<em>> </em><br>
<em>> It builds, and most of glibc's test suite currently passes, except </em><br>
<em>> for some tests that deal with floating point arithmetic, and some </em><br>
<em>> tests which use very obscure GNU as features which I haven't seen </em><br>
<em>> used outside the glibc test suite. </em><br>
<em>> </em><br>
<em>> Hopefully within a month or so everything should be upstreamed, but </em><br>
<em>> if you're itching for something that works now I can try to find some </em>
<br>
<em>> time to send some WIP patches and instructions. </em><br>
<em></em><br>
</div>
<em>This is amazing! </em><br>
<em></em><br>
<em>What are you guys doing about -fno-toplevel-reorder? </em><br>
<em></em><br>
<em>Cheers, </em><br>
<em>Rafael </em><br>
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<div><em></em><span title="Friday, June 7, 2013 1:33:39 PM UTC-4"><em>6/7/13</em></span><em>
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<div><em></em><span><em>Other recipients: </em></span><em></em><span><em></em><span><em><a href="mailto:rafael.e...@gmail.com" target="_blank">rafael.e...@gmail.com</a>, <a href="mailto:llv...@cs.uiuc.edu" target="_blank">llv...@cs.uiuc.edu</a></em></span><em>
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<div><em>On Fri, Jun 07, 2013 at 11:48:03AM -0400, Rafael Espíndola wrote:
</em><br>
<em>> > It is (almost) possible to compile glibc using DragonEgg -- there </em><br>
<em>> > are only a handful of patches required (for LLVM and DragonEgg), </em><br>
<em>> > most of which are now up for review. </em><br>
<em>> > </em><br>
<em>> > It builds, and most of glibc's test suite currently passes, except </em><br>
<em>> > for some tests that deal with floating point arithmetic, and some </em><br>
<em>> > tests which use very obscure GNU as features which I haven't seen </em><br>
<em>> > used outside the glibc test suite. </em><br>
<em>> > </em><br>
<em>> > Hopefully within a month or so everything should be upstreamed, but </em>
<br>
<em>> > if you're itching for something that works now I can try to find some </em>
<br>
<em>> > time to send some WIP patches and instructions. </em><br>
<em>> </em><br>
<em>> This is amazing! </em><br>
<em>> </em><br>
<em>> What are you guys doing about -fno-toplevel-reorder? </em><br>
<em></em><br>
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<em>I haven't done anything about this flag, to be honest. From looking </em><br>
<em>at glibc's git HEAD it seems to currently be only used by two files </em><br>
<em>-- siglist.c and errlist.c -- and maybe I'm missing something but I </em><br>
<em>can't see any reason why either of these files now need it (in the </em><br>
<em>past these files seem to have contained some assembly but now </em><br>
<em>only contain straight C declarations). It also seems to have been used </em>
<br>
<em>in the past by initfini.c but that file is now gone from glibc git. </em><br>
<em></em><br>
<em>Thanks, </em><br>
<em>-- </em><br>
<em>Peter </em><br>
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<div><em></em><span title="Friday, June 7, 2013 1:49:12 PM UTC-4"><em>6/7/13</em></span><em>
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<div><em></em><span><em>Other recipients: </em></span><em></em><span><em></em><span><em><a href="mailto:pe...@pcc.me.uk" target="_blank">pe...@pcc.me.uk</a>, <a href="mailto:llv...@cs.uiuc.edu" target="_blank">llv...@cs.uiuc.edu</a></em></span><em>
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<div><em>>> What are you guys doing about -fno-toplevel-reorder?
</em><br>
<em>> </em><br>
<em>> I haven't done anything about this flag, to be honest. From looking </em><br>
<em>> at glibc's git HEAD it seems to currently be only used by two files </em><br>
<em>> -- siglist.c and errlist.c -- and maybe I'm missing something but I </em><br>
<em>> can't see any reason why either of these files now need it (in the </em><br>
<em>> past these files seem to have contained some assembly but now </em><br>
<em>> only contain straight C declarations). It also seems to have been used </em>
<br>
<em>> in the past by initfini.c but that file is now gone from glibc git. </em><br>
<em></em><br>
</div>
<em>I went looking in glibc's git and found </em><br>
<em>3add8e1353d62d77fdd9b4ca363cdf</em>
<div style="overflow:auto"><u></u><em>e7006b0efb adding support for crti and </em><br>
<em>crtn written is assembly, which eventually replaced the old initfini.c </em><br>
<em>hack. </em><br>
<em></em><br>
<em>Congratulations to all those involved, this a much better state than I </em><br>
<em>would have dreamed possible some years ago. </em><br>
<em></em><br>
<em>Cheers, </em><br>
<em>Rafael </em><br>
<div>
<div><em>- show quoted text -</em></div>
</div>
</div>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p>Is there any way to compile glibc only using clang as I have to be able to pass clang specific parameters for a pass to run on each file. </p>
<p><br>
</p>
<p><br>
</p>
<p>Thanks,</p>
<p>Josh<br>
</p>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr">Alexey Samsonov<br><a href="mailto:vonosmas@gmail.com" target="_blank">vonosmas@gmail.com</a></div>
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