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

In the failing command (iossim-log) the syslibroot flag is being specified to
the linker and the link command still fails, so your patch shouldn’t fix the
problem. You can see that listed in iossim-link.txt.

The other error is (if anything) more disturbing. You’re generating a malformed
libLLVMSupport. Not sure how that’s happening.

It looks to me like there is something wrong with your host toolchain. I don’t
really know what else to say, but your patch shouldn’t have any impact on this
problem since that flag is already being specified in the failing commands
you’ve shown.

-Chris
> On Sep 22, 2015, at 1:43 PM, Alex Wang via llvm-commits <llvm-commits at
lists.llvm.org> wrote:
> 
> 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
<https://github.com/aw1621107/homebrew/blob/llvm-updates/Library/Formula/llvm.rb>
>> On Sep 22, 2015, at 4:08 PM, Joerg Sonnenberger via llvm-dev
<llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>>
wrote:
>> 
>> 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
>> _______________________________________________
>> 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
> 
> _______________________________________________
> llvm-commits mailing list
> llvm-commits at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
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Whoops. Forgot to include what happened before the patch.

Without it, my build fails earlier with something along the lines of
"Building for
iOS simulator, but linking against file (libc++.dylib) built for OS X
(x86_64)".
The linker wasn't touching the iPhone SDK at all, instead going straight for
/usr/lib/libc++.dylib. This also happened with libSystem.dylib, but I don't
know
what causes one library to fail vs the other.
> On Sep 22, 2015, at 4:57 PM, Chris Bieneman <beanz at apple.com>
wrote:
> 
> In the failing command (iossim-log) the syslibroot flag is being specified
to the linker and the link command still fails, so your patch shouldn’t fix the
problem. You can see that listed in iossim-link.txt.
> 
> The other error is (if anything) more disturbing. You’re generating a
malformed libLLVMSupport. Not sure how that’s happening.
> 
> It looks to me like there is something wrong with your host toolchain. I
don’t really know what else to say, but your patch shouldn’t have any impact on
this problem since that flag is already being specified in the failing commands
you’ve shown.
> 
> -Chris
> 
>> On Sep 22, 2015, at 1:43 PM, Alex Wang via llvm-commits
<llvm-commits at lists.llvm.org <mailto:llvm-commits at
lists.llvm.org>> wrote:
>> 
>> 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
<https://github.com/aw1621107/homebrew/blob/llvm-updates/Library/Formula/llvm.rb>
>>> On Sep 22, 2015, at 4:08 PM, Joerg Sonnenberger via llvm-dev
<llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>>
wrote:
>>> 
>>> 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
>>> _______________________________________________
>>> 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>
>> 
>> _______________________________________________
>> llvm-commits mailing list
>> llvm-commits at lists.llvm.org <mailto:llvm-commits at
lists.llvm.org>
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
> 
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Can you please provide the full error and information about the failure you saw
without your patch?

Since you couldn’t build before the patch, and you can’t build with the patch. I
suspect there is an underlying issue which isn’t being addressed.

-Chris
> On Sep 22, 2015, at 2:02 PM, Alex Wang <aw1621107 at gmail.com>
wrote:
> 
> Whoops. Forgot to include what happened before the patch.
> 
> Without it, my build fails earlier with something along the lines of
"Building for
> iOS simulator, but linking against file (libc++.dylib) built for OS X
(x86_64)".
> The linker wasn't touching the iPhone SDK at all, instead going
straight for
> /usr/lib/libc++.dylib. This also happened with libSystem.dylib, but I
don't know
> what causes one library to fail vs the other.
> 
>> On Sep 22, 2015, at 4:57 PM, Chris Bieneman <beanz at apple.com
<mailto:beanz at apple.com>> wrote:
>> 
>> In the failing command (iossim-log) the syslibroot flag is being
specified to the linker and the link command still fails, so your patch
shouldn’t fix the problem. You can see that listed in iossim-link.txt.
>> 
>> The other error is (if anything) more disturbing. You’re generating a
malformed libLLVMSupport. Not sure how that’s happening.
>> 
>> It looks to me like there is something wrong with your host toolchain.
I don’t really know what else to say, but your patch shouldn’t have any impact
on this problem since that flag is already being specified in the failing
commands you’ve shown.
>> 
>> -Chris
>> 
>>> On Sep 22, 2015, at 1:43 PM, Alex Wang via llvm-commits
<llvm-commits at lists.llvm.org <mailto:llvm-commits at
lists.llvm.org>> wrote:
>>> 
>>> 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
<https://github.com/aw1621107/homebrew/blob/llvm-updates/Library/Formula/llvm.rb>
>>>> On Sep 22, 2015, at 4:08 PM, Joerg Sonnenberger via llvm-dev
<llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>>
wrote:
>>>> 
>>>> 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
>>>> _______________________________________________
>>>> 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>
>>> 
>>> _______________________________________________
>>> llvm-commits mailing list
>>> llvm-commits at lists.llvm.org <mailto:llvm-commits at
lists.llvm.org>
>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
<http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits>
>> 
> 
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