llvm dev - Sep 2015 - [compiler-rt] Add iOS simulator link flag

+llvm-commits (correct list)

On Tue, Sep 22, 2015 at 12:32 PM, Alexey Samsonov <vonosmas at gmail.com>
wrote:
> Could you describe the build failures you see after applying this patch?
> I'll let Chris judge if adding -Wl,-syslibroot makes sense for iossim,
or
> that problem should be solved differently.
>
> On Tue, Sep 22, 2015 at 9:37 AM, Alex Wang via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hello all!
>>
>> Just got a small patch I’d like to put up for review.
>>
>> llvm with clang and compiler-rt have been consistently failing for me
>> during
>> the linking step for either the address or ub sanitizer for iOS
simulator.
>>
>> As far as I could tell, passing -isysroot to clang++ when linking does
not
>> also set the search root for ld. This patch addresses that issue.
>>
>> Unfortunately, the build fails later on, so I can't say for sure
whether
>> this won't break anything else, or if it is required elsewhere.
I'm also
>> not sure if this is specific to my computer, but it persisted between a
>> wipe + reinstall, so I'm hoping it isn't just me getting this.
>>
>> Thanks,
>> Alex
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>>
>
>
> --
> Alexey Samsonov
> vonosmas at gmail.com
>


-- 
Alexey Samsonov
vonosmas at gmail.com
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This does not sound right. -isysroot specified during linking should be passing
through the sys root to the linker.

What is the error you’re seeing? It would also help if you can provide the
clang++ invocation and the output of it when run with -v.

Also which version of OS X are you on and which version of Xcode are you using?

Thanks,
-Chris
> On Sep 22, 2015, at 12:34 PM, Alexey Samsonov <vonosmas at gmail.com>
wrote:
> 
> +llvm-commits (correct list)
> 
> On Tue, Sep 22, 2015 at 12:32 PM, Alexey Samsonov <vonosmas at gmail.com
<mailto:vonosmas at gmail.com>> wrote:
> Could you describe the build failures you see after applying this patch?
I'll let Chris judge if adding -Wl,-syslibroot makes sense for iossim, or
that problem should be solved differently.
> 
> On Tue, Sep 22, 2015 at 9:37 AM, Alex Wang via llvm-dev <llvm-dev at
lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote:
> Hello all!
> 
> Just got a small patch I’d like to put up for review.
> 
> llvm with clang and compiler-rt have been consistently failing for me
during
> the linking step for either the address or ub sanitizer for iOS simulator.
> 
> As far as I could tell, passing -isysroot to clang++ when linking does not
> also set the search root for ld. This patch addresses that issue.
> 
> Unfortunately, the build fails later on, so I can't say for sure
whether
> this won't break anything else, or if it is required elsewhere. I'm
also
> not sure if this is specific to my computer, but it persisted between a
> wipe + reinstall, so I'm hoping it isn't just me getting this.
> 
> Thanks,
> Alex
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
<http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev>
> 
> 
> 
> 
> -- 
> Alexey Samsonov
> vonosmas at gmail.com <mailto:vonosmas at gmail.com>
> 
> 
> -- 
> Alexey Samsonov
> vonosmas at gmail.com <mailto:vonosmas at gmail.com>
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On Tue, Sep 22, 2015 at 01:04:27PM -0700, Chris Bieneman via llvm-dev
wrote:
> This does not sound right. -isysroot specified during linking should be
passing through the sys root to the linker.
No? It should just be dropped.

Joerg

Summary is linker fails with unknown symbol in iossim asan/ubsan (was _wordexp
in the past, now is _sigaltstack$UNIX2003"i), or ranlib getting bad input
while
working on native tablegen (archive extends past end of file, no such file are
the ones I remember)

Full commands + partial logs here:
    https://gist.github.com/aw1621107/86fec1e1fa9cc66bbf4d
<https://gist.github.com/aw1621107/86fec1e1fa9cc66bbf4d>

This was built on OS X 10.11, Xcode 7.1 using the following homebrew command
and formula:

  brew install llvm --with-clang --with-sanitizers --HEAD --debug --verbose
 
https://github.com/aw1621107/homebrew/blob/llvm-updates/Library/Formula/llvm.rb
> On Sep 22, 2015, at 4:04 PM, Chris Bieneman <beanz at apple.com>
wrote:
> 
> This does not sound right. -isysroot specified during linking should be
passing through the sys root to the linker.
> 
> What is the error you’re seeing? It would also help if you can provide the
clang++ invocation and the output of it when run with -v.
> 
> Also which version of OS X are you on and which version of Xcode are you
using?
> 
> Thanks,
> -Chris
> 
>> On Sep 22, 2015, at 12:34 PM, Alexey Samsonov <vonosmas at gmail.com
<mailto:vonosmas at gmail.com>> wrote:
>> 
>> +llvm-commits (correct list)
>> 
>> On Tue, Sep 22, 2015 at 12:32 PM, Alexey Samsonov <vonosmas at
gmail.com <mailto:vonosmas at gmail.com>> wrote:
>> Could you describe the build failures you see after applying this
patch? I'll let Chris judge if adding -Wl,-syslibroot makes sense for
iossim, or that problem should be solved differently.
>> 
>> On Tue, Sep 22, 2015 at 9:37 AM, Alex Wang via llvm-dev <llvm-dev at
lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote:
>> Hello all!
>> 
>> Just got a small patch I’d like to put up for review.
>> 
>> llvm with clang and compiler-rt have been consistently failing for me
during
>> the linking step for either the address or ub sanitizer for iOS
simulator.
>> 
>> As far as I could tell, passing -isysroot to clang++ when linking does
not
>> also set the search root for ld. This patch addresses that issue.
>> 
>> Unfortunately, the build fails later on, so I can't say for sure
whether
>> this won't break anything else, or if it is required elsewhere.
I'm also
>> not sure if this is specific to my computer, but it persisted between a
>> wipe + reinstall, so I'm hoping it isn't just me getting this.
>> 
>> Thanks,
>> Alex
>> 
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
<http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev>
>> 
>> 
>> 
>> 
>> -- 
>> Alexey Samsonov
>> vonosmas at gmail.com <mailto:vonosmas at gmail.com>
>> 
>> 
>> -- 
>> Alexey Samsonov
>> vonosmas at gmail.com <mailto:vonosmas at gmail.com>
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