[LLVMdev] Build failure with libcxx

[İsmail Dönmez]

Not yet, will file one and CC you. Thanks!


On Mon, May 12, 2014 at 2:02 PM, Nico Weber <thakis at chromium.org> wrote:

> I'm afk for a few more hours (traveling), will look once I'm at a
> keyboard. Is there a PR for this?
>  On May 12, 2014 11:47 AM, "İsmail Dönmez" <ismail at donmez.ws> wrote:
>
>> Ok looks like r207606 regressed this. CC'ing Niko.
>>
>> Niko, please see the messages below. This is on openSUSE 13.1 both on
>> i586 and x86-64. Reverting r207606 fixes the second stage bootstrap.
>>
>>
>>
>> On Sun, May 11, 2014 at 10:19 PM, İsmail Dönmez <ismail at donmez.ws> wrote:
>>
>>> I did a diff -u broken.ii working.ii and the difference explains the
>>> problem:
>>>
>>> @@ -36617,7 +36628,7 @@
>>>      } x;
>>>    };
>>>    return Allocator.Allocate(
>>> -      Size, std::min((size_t)llvm::NextPowerOf2(Size), offsetof(S, x)));
>>> +      Size, std::min((size_t)llvm::NextPowerOf2(Size),
>>> __builtin_offsetof(S, x)));
>>>  }
>>>
>>>
>>> Looks like non-working clang is using offsetof where-as the working one
>>> uses __builtin_offsetof
>>>
>>>
>>>
>>> On Fri, May 9, 2014 at 11:38 AM, İsmail Dönmez <ismail at donmez.ws> wrote:
>>>
>>>> Hi,
>>>>
>>>> Recently my libcxx enabled llvm/clang builds has started to fail in
>>>> stage2. I must admit I am stomped because I cannot make sense of the error:
>>>>
>>>> [  723s] FAILED: /home/abuild/rpmbuild/BUILD/llvm/stage1/bin/clang++
>>>> -DLLVMSupport_EXPORTS -DNDEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS
>>>> -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -stdlib=libc++ -fPIC
>>>> -fvisibility-inlines-hidden -Wall -W -Wno-unused-parameter -Wwrite-strings
>>>> -Wmissing-field-initializers -pedantic -Wno-long-long
>>>> -Wcovered-switch-default -Wnon-virtual-dtor -std=c++11 -fcolor-diagnostics
>>>> -ffunction-sections -fdata-sections -O2 -g -DNDEBUG -fPIC -Ilib/Support
>>>> -I../lib/Support -Iinclude -I../include    -fno-exceptions -MMD -MT
>>>> lib/Support/CMakeFiles/LLVMSupport.dir/Allocator.cpp.o -MF
>>>> lib/Support/CMakeFiles/LLVMSupport.dir/Allocator.cpp.o.d -o
>>>> lib/Support/CMakeFiles/LLVMSupport.dir/Allocator.cpp.o -c
>>>> ../lib/Support/Allocator.cpp
>>>> [  723s] In file included from ../lib/Support/Allocator.cpp:14:
>>>> [  723s] ../include/llvm/Support/Allocator.h:421:65: error: 'S' does
>>>> not refer to a value
>>>> [  723s]       Size, std::min((size_t)llvm::NextPowerOf2(Size),
>>>> offsetof(S, x)));
>>>> [  723s]
>>>>   ^
>>>> [  723s] ../include/llvm/Support/Allocator.h:411:10: note: declared here
>>>> [  723s]   struct S {
>>>> [  723s]          ^
>>>> [  723s] 1 error generated.
>>>>
>>>> clang r207403 is OK but trunk fails. Any ideas for debugging this would
>>>> be appreciated.
>>>>
>>>> Thanks!
>>>>
>>>>
>>>
>>
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