[cfe-dev] clang ToT doesn't build on macOS 10.10 anymore...?

[Sean McBride via cfe-dev]

Eli,

I don't believe I'm specifying any target triple (I confess I don't exactly know what that is).  I'm just doing a vanilla cmake & make on macOS 10.10 using Xcode 7.2.1's compiler & SDK.  No cross compiling.  Searching cmake's output for "triple" reveals this though: x86_64-apple-darwin14.5.0

One new data point: if I manually apply Akira's DISPATCH_NOESCAPE fix to r314850, that builds; but r314851 does not.

Sean


On Mon, 12 Mar 2018 12:22:25 -0700, Friedman, Eli said:

>What target triple are you compiling for?  Targets which define 
>"__ARM_EABI__" should also define "__ELF__", as far as I know.
>
>-Eli
>
>On 3/12/2018 6:50 AM, Sean McBride wrote:
>> Akira,
>>
>> Yes, it seems so.  If I try to build r321543 I don't get the
>DISPATCH_NOESCAPE error, but do still get the adddf3.c error.
>>
>> Sean
>>
>>
>> On Sat, 10 Mar 2018 15:46:54 -0800, Akira Hatanaka said:
>>
>>> Wasn't the NOESCAPE error fixed in r321543?
>>>
>>> https://reviews.llvm.org/D41601
>>>
>>> On Sat, Mar 10, 2018 at 1:35 PM, Sean McBride <sean at rogue-research.com>
>>> wrote:
>>>
>>>> CC'ing ahatanak and efriedma
>>>>
>>>> So I bisected where building on macOS 10.10 broke, and found at least 2
>>>> commits that introduced errors:
>>>>
>>>> -------------------------------
>>>> r313929 | ahatanak | 2017-09-21 18:16:50 -0400 (Thu, 21 Sep 2017)
>>>>
>>>> /llvm/llvm/projects/compiler-rt/lib/tsan/rtl/tsan_libdispatch_mac.cc:
>229:1:
>>>> error: unknown type name 'DISPATCH_NOESCAPE'
>>>> DISPATCH_INTERCEPT_SYNC_B(dispatch_sync, false)
>>>> ^
>>>> -------------------------------
>>>>
>>>> -------------------------------
>>>> r314851 | efriedma | 2017-10-03 17:25:07 -0400 (Tue, 03 Oct 2017)
>>>>
>>>> /llvm/llvm/projects/compiler-rt/lib/builtins/adddf3.c:28:53: error: alias
>>>> unsupported on this file format
>>>> AEABI_RTABI double __aeabi_dadd(double a, double b)
>>>> COMPILER_RT_ALIAS(__adddf3);
>>>>                                                      ^
>>>> -------------------------------
>>>>
>>>>
>>>> On Wed, 7 Feb 2018 12:23:16 +0100, Hans Wennborg said:
>>>>
>>>>> I just ran into the same thing :-/
>>>>>
>>>>> On Fri, Jan 26, 2018 at 11:22 PM, Sean McBride via cfe-dev
>>>>> <cfe-dev at lists.llvm.org> wrote:
>>>>>> Hi all,
>>>>>>
>>>>>> I just tried updating my clang build on a few machines, and it built
>>>>> fine on 10.11, but on a macOS 10.10 with AppleClang 7.0.2.7000181 I get
>>>> this:
>>>>>> /Users/builder/llvm/llvm/projects/compiler-rt/lib/builtins/adddf3.c:
>>>>> 28:53: error: alias unsupported on this file format
>>>>>> AEABI_RTABI double __aeabi_dadd(double a, double b)
>>>>> COMPILER_RT_ALIAS(__adddf3);
>>>>>>                                                      ^
>>>>>> /Users/builder/llvm/llvm/projects/compiler-rt/lib/builtins/int_lib.h:
>>>>> 29:36: note: expanded from macro 'COMPILER_RT_ALIAS'
>>>>>> #define COMPILER_RT_ALIAS(aliasee) _Pragma("GCC error(\"alias
>>>>> unsupported on this file format\")")
>>>>>>                                     ^
>>>>>> <scratch space>:89:6: note: expanded from here
>>>>>>   GCC error("alias unsupported on this file format")
>>>>>>       ^
>>>>>>
>>>>>> Should this build?  Is 10.10 supported?
>>
>
>-- 
>Employee of Qualcomm Innovation Center, Inc.
>Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a
>Linux Foundation Collaborative Project
>

Cheers,

-- 
____________________________________________________________
Sean McBride, B. Eng                 sean at rogue-research.com
Rogue Research                        www.rogue-research.com 
Mac Software Developer              Montréal, Québec, Canada