[cfe-dev] [LLVMdev] [libcxx] Linking against just-built libcxxabi

[Greg Fitzgerald]

> I'll commit a fix for this in the coming days but until then you can
> use the patch attached. That seemed to fix it for me.

Very cool.  I just applied the patch and all tests are now passing, thanks!


> Be very careful with what you do with your custom build libc++ and
> libc++abi. Installing these in the wrong place can prevent your system
> from booting.

Good to know, thanks again!

-Greg


On Tue, Feb 3, 2015 at 7:46 PM, Eric Fiselier <eric at efcs.ca> wrote:
> Hi,
>
> I'm seeing the exact same thing you are. The problem has to do with
> how CMake links libc++. After *trying* to build against a just-built
> libc++abi I ran otool -L over libc++.dylib and the output was as
> followed:
>
>> ../build-libcxx/lib/libc++.dylib:
>> @rpath/libc++.1.dylib (compatibility version 1.0.0, current version 1.0.0)
>> /usr/lib/libc++abi.dylib (compatibility version 1.0.0, current version 49.1.0)
>> @rpath/libc++abi.1.dylib (compatibility version 1.0.0, current version 1.0.0)
>> /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1197.1.1)
>
> So two different versions of libc++abi were linked into libc++.
>
> I'll commit a fix for this in the coming days but until then you can
> use the patch attached. That seemed to fix it for me.
> Be very careful with what you do with your custom build libc++ and
> libc++abi. Installing these in the wrong place can prevent your system
> from booting.
>
> /Eric
>
> On Tue, Feb 3, 2015 at 7:01 PM, Dan Albert <danalbert at google.com> wrote:
>> -llvmdev, +cfe-dev
>>
>> On Tue, Feb 3, 2015 at 2:55 PM, Greg Fitzgerald <garious at gmail.com> wrote:
>>>
>>> On OS X 10.9.5, I can only get all libcxx tests to pass if I link
>>> against the system libcxxabi.  If instead, I link against the
>>> just-built libcxxabi (using Apple LLVM version 6.0 based on LLVM 3.5),
>>> I see the following test failures:
>>>
>>> Failing Tests (9):
>>>     libc++ ::
>>> std/language.support/support.dynamic/new.delete/new.delete.array/new_array.pass.cpp
>>>     libc++ ::
>>> std/language.support/support.dynamic/new.delete/new.delete.array/new_array_nothrow.pass.cpp
>>>     libc++ ::
>>> std/language.support/support.dynamic/new.delete/new.delete.single/new.pass.cpp
>>>     libc++ ::
>>> std/language.support/support.dynamic/new.delete/new.delete.single/new_nothrow.pass.cpp
>>>     libc++ ::
>>> std/language.support/support.exception/except.nested/rethrow_nested.pass.cpp
>>>     libc++ ::
>>> std/localization/locales/locale.global.templates/use_facet.pass.cpp
>>>     libc++ ::
>>> std/localization/locales/locale/locale.cons/char_pointer.pass.cpp
>>>     libc++ :: std/strings/basic.string/string.capacity/max_size.pass.cpp
>>>     libc++ ::
>>> std/thread/thread.threads/thread.thread.class/thread.thread.destr/dtor.pass.cpp
>>>
>>> Error messages include:
>>>
>>> libc++abi.dylib: terminating
>>> libc++abi.dylib: terminating with uncaught exception of type
>>> std::bad_cast: std::bad_cast
>>> libc++abi.dylib: terminating with uncaught exception of type
>>> std::runtime_error: locale constructed with null
>>> libc++abi.dylib: terminating with uncaught exception of type
>>> std::bad_alloc
>>> Assertion failed: (false), function main, file
>>>
>>> std/language.support/support.dynamic/new.delete/new.delete.array/new_array.pass.cpp,
>>> line 50.
>>> Assertion failed: (new_handler_called == 1), function main, file
>>>
>>> std/language.support/support.dynamic/new.delete/new.delete.array/new_array_nothrow.pass.cpp,
>>> line 42.
>>>
>>>
>>>
>>> To link against the just-built library, I'm adding the following CMake
>>> define:
>>>
>>>     -DLIBCXX_CXX_ABI_LIBRARY_PATH=../libcxxabi_install/lib
>>>
>>> Am I building libcxxabi correctly?  All tests in its own test suite
>>> pass.  Or perhaps is libcxxabi only supported for certain OS X
>>> versions?
>>>
>>> Thanks,
>>> Greg
>>> _______________________________________________
>>> LLVM Developers mailing list
>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>
>>
>>
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