[cfe-dev] New C++0x feature support in Clang

[Howard Hinnant]

On Jan 27, 2011, at 3:59 AM, İsmail Dönmez wrote:

> Hi;
> 
> On Thu, Jan 27, 2011 at 2:27 AM, Howard Hinnant <hhinnant at apple.com> wrote:
> 
> On Jan 26, 2011, at 6:22 PM, Jean-Daniel Dupas wrote:
> 
> >
> > Le 26 janv. 2011 à 22:45, Douglas Gregor a écrit :
> >
> >> Clang has recently gotten much-improved support for the upcoming C++0x standard. In particular, top-of-tree Clang now supports a number of C++0x features:
> >>
> >>      - Rvalue references (including rvalue references for *this)
> >>      - Variadic templates
> >>      - Inline namespaces
> >>      - Late-specified return types
> >>      - Decltype
> >>
> >> You can turn on C++0x support with the -std=gnu++0x (or, if you want to be more pedantic, -std=c++0x).
> >>
> >> Give it a spin, write some tests, try it out with libc++, and tell us how it went! And if you get the itch to hack on Clang, there are a ton of other little C++0x features that you could implement.
> >>
> >
> > A quick reminder about "How to use libc++ with clang" will be welcome at this point ;-)
> 
> It depends on the platform.  On OS X 10.6, download this library:
> 
> http://home.roadrunner.com/~hinnant/libcppabi.zip
> 
> and copy it into /usr/lib .
> 
> This is a low-level library that takes care of things like typeinfo and exception propagation.  Once that is taken care of:
> 
> $ clang++ -stdlib=libc++ test.cpp
> 
> This will assume that /usr/lib/libc++.dylib exists.  And the libc++ headers should be installed at /usr/include/c++/v1/ .
> 
> I tried to build on OSX 10.6 and looks like there is a problem with c++ includes:
> 
> + for FILE in '../src/*.cpp'
> + clang++ -c -g -Os -fPIC -nostdinc++ -I../include ../src/condition_variable.cpp
> ../src/condition_variable.cpp:15:1: warning: inline namespaces are a C++0x feature [-Wc++0x-extensions]
> _LIBCPP_BEGIN_NAMESPACE_STD
> ^
> In file included from ../src/condition_variable.cpp:10:
> In file included from ../include/condition_variable:110:
> ../include/__config:151:52: note: instantiated from:
> #define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {inline namespace _LIBCPP_NAMESPACE {
>                                                    ^
> 1 warning generated.
> + for FILE in '../src/*.cpp'
> + clang++ -c -g -Os -fPIC -nostdinc++ -I../include ../src/exception.cpp
> ../src/exception.cpp:14:12: fatal error: 'cxxabi.h' file not found
>   #include <cxxabi.h>
>            ^
> 1 error generated.
> 
> Regards,
> ismail
>  

Sorry, I forgot a step:

$ export TRIPLE=-apple-

before you ./buildit.

-Howard