[cfe-dev] libc++ on Mac OS X 10.6

[Jean-Daniel Dupas]

Le 10 oct. 2011 à 11:26, Konstantin Tokarev a écrit :

> 
> 
> 10.10.2011, 12:45, "Jean-Daniel Dupas" <devlists at shadowlab.org>:
>> Le 10 oct. 2011 à 10:17, Jonathan Sauer a écrit :
>> 
>>>>>  When trying to use libc++ on a trunk clang on Mac OS X 10.6, I get:
>>>>> 
>>>>>  /llvm-bin/bin/clang++ temp.cc -stdlib=libc++
>>>>>  clang: error: invalid deployment target for -stdlib=libc++ (requires Mac OS X 10.7 or later)
>>>>> 
>>>>>  This used to work on 10.6. Was there a good reason for breaking this on 10.6, and is there any workaround?
>>>>> 
>>>>>  I find this disappointing, as I had hoped the next release of clang, with libc++, would provide a good base-line C++0x compiler. However, I would really like not to require 10.7, as I know various people who do not intend to upgrade any time soon.
>>>>  Sorry about that.  I've updated the instructions for building on 10.6.  Do:
>>>> 
>>>>  $ export MACOSX_DEPLOYMENT_TARGET=10.6
>>>> 
>>>>  prior to ./buildit
>>>  That seems to work for libc++. However, the problem persists when building an XCode project on 10.6:
>>> 
>>>  | clang: error: invalid deployment target for -stdlib=libc++ (requires Mac OS X 10.7 or later)
>>> 
>>>  When I change the build variable MACOSX_DEPLOYMENT_TARGET to 10.7, the project builds, but of course crashes on
>>>  startup.
>>> 
>>>  The TOT from last week worked perfectly. Is there a non-political (i.e. not Apple wanting people to ditch 10.6)
>>>  reason for this change?
>> 
>> T> he commit you're looking for is r141374 ( https://llvm.org/viewvc/llvm-project?view=rev&sortby=log&revision=141374 )
>> 
>> Until you got an official response, you can at least look at the changes, and patch your local clang copy to be able to continue to use clang/libc++ on 10.6.
> 
> Seems like that changes in ToolChains.cpp are related to iOS simulator, and commit message states about "Lion support", not dropping of everything else :)
> 

Yes, but despite its name, it looks like that LibCXXForSimulator is checked even when you don't target iOS (or iOS simulator).

-- Jean-Daniel