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

The behavior here is consistent with setting SDKROOT in the environment to an OS
X SDK.

-Chris
> On Sep 22, 2015, at 2:28 PM, Alex Wang <aw1621107 at gmail.com>
wrote:
> 
> Logs + commands added to the earlier gist.
> 
> Only thing different from a plain trunk build is adding -Wl,-v and -Wl,-t
to the
> iossim link flags.
> 
>> On Sep 22, 2015, at 5:17 PM, Chris Bieneman <beanz at apple.com
<mailto:beanz at apple.com>> wrote:
>> 
>> 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
<mailto: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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Doesn't look like it's set when that command runs. 

The env during the build looks something like the first one here:
https://gist.github.com/aw1621107/3e0b5a36d028f648d7a0
<https://gist.github.com/aw1621107/3e0b5a36d028f648d7a0>
> On Sep 22, 2015, at 5:42 PM, Chris Bieneman <beanz at apple.com>
wrote:
> 
> The behavior here is consistent with setting SDKROOT in the environment to
an OS X SDK.
> 
> -Chris
> 
>> On Sep 22, 2015, at 2:28 PM, Alex Wang <aw1621107 at gmail.com
<mailto:aw1621107 at gmail.com>> wrote:
>> 
>> Logs + commands added to the earlier gist.
>> 
>> Only thing different from a plain trunk build is adding -Wl,-v and
-Wl,-t to the
>> iossim link flags.
>> 
>>> On Sep 22, 2015, at 5:17 PM, Chris Bieneman <beanz at apple.com
<mailto:beanz at apple.com>> wrote:
>>> 
>>> 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 <mailto: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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Sadly I really can’t help you debug the home-brew build, it is a good ways
outside my expertise.

If you want to try building from source using the guide here:
http://llvm.org/docs/GettingStarted.html#getting-started-quickly-a-summary
<http://llvm.org/docs/GettingStarted.html#getting-started-quickly-a-summary>

I’d be more helpful. As it is, the patch you proposed doesn’t seem to make it
build via home-brew, and I don’t think we should be taking an effectively
untested patch that doesn’t actually enable you to build.

You may want to take up this issue with whomever maintains the home-brew package
you’re trying to build.

-Chris
> On Sep 22, 2015, at 2:50 PM, Alex Wang <aw1621107 at gmail.com>
wrote:
> 
> Doesn't look like it's set when that command runs. 
> 
> The env during the build looks something like the first one here:
> https://gist.github.com/aw1621107/3e0b5a36d028f648d7a0
<https://gist.github.com/aw1621107/3e0b5a36d028f648d7a0>
> 
>> On Sep 22, 2015, at 5:42 PM, Chris Bieneman <beanz at apple.com
<mailto:beanz at apple.com>> wrote:
>> 
>> The behavior here is consistent with setting SDKROOT in the environment
to an OS X SDK.
>> 
>> -Chris
>> 
>>> On Sep 22, 2015, at 2:28 PM, Alex Wang <aw1621107 at gmail.com
<mailto:aw1621107 at gmail.com>> wrote:
>>> 
>>> Logs + commands added to the earlier gist.
>>> 
>>> Only thing different from a plain trunk build is adding -Wl,-v and
-Wl,-t to the
>>> iossim link flags.
>>> 
>>>> On Sep 22, 2015, at 5:17 PM, Chris Bieneman <beanz at
apple.com <mailto:beanz at apple.com>> wrote:
>>>> 
>>>> 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 <mailto: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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