llvm dev - Jun 2012 - [LLVMdev] Error compiling llvm/clang with clang+libc++ with -std=cxx0x

Hi All,
    I'm using LLVM/Clang 3.1 release.

    I first compiled llvm/clang using GCC per the instructions on the 
web with cmake. I then compiled libc++ per the instructions on the web. 
I then tried to compile llvm/clang with previously compiled clang and 
libc++ using "-std=c++0x -stdlib=libc++" flags. But the compilation 
fails at:
> [ 58%] Building CXX object
tools/bugpoint/CMakeFiles/bugpoint.dir/ToolRunner.cpp.o
> clang-3: warning: argument unused during compilation:
'-stdlib=libc++'
> clang-3: warning: argument unused during compilation:
'-L/local/mnt/workspace/ashoknn/519_libcxx_transition/llvm/build/../../libcxx.artifacts/linux-clang/lib'
>
/local/mnt/workspace/ashoknn/519_libcxx_transition/llvm/src/tools/bugpoint/ToolRunner.cpp:131:12:
error: invalid operands to binary expression ('llvm::raw_ostream' and
'std::ostringstream'
>       (aka 'basic_ostringstream<char>'))
>     errs() << OS;
>     ~~~~~~ ^  ~~
    If I remove the -std=c++0x, then the compilation is successful. I 
checked to see if libc++ itself was compiled with the flag and indeed it 
was.

   Any pointers?

TIA,
Ashok

On 2012-06-26 04:22, Ashok Nalkund wrote:
...
>>
/local/mnt/workspace/ashoknn/519_libcxx_transition/llvm/src/tools/bugpoint/ToolRunner.cpp:131:12:
error: invalid operands to binary expression ('llvm::raw_ostream' and
'std::ostringstream'
>>       (aka 'basic_ostringstream<char>'))
>>     errs() << OS;
>>     ~~~~~~ ^  ~~
> 
Hi Ashok, please try applying this diff from r155978 to your 3.1 release tree:

--- llvm/trunk/tools/bugpoint/ToolRunner.cpp	2012/05/02 05:31:31	155977
+++ llvm/trunk/tools/bugpoint/ToolRunner.cpp	2012/05/02 05:39:10	155978
@@ -128,7 +128,7 @@
       ErrorFile.close();
     }
 
-    errs() << OS;
+    errs() << OS.str();
   }
 
   return ReturnCode;

Thanks Dimitry. That worked.

I see some warnings in my compilations:
> Building CXX object
lib/Support/CMakeFiles/LLVMSupport.dir/IntEqClasses.cpp.o
> [  2%] clang-3: warning: argument unused during compilation:
'-nostdinc++'
> Building CXX object
lib/Support/CMakeFiles/LLVMSupport.dir/IntrusiveRefCntPtr.cpp.o
> clang-3: warning: argument unused during compilation:
'-stdlib=libc++'
Is that expected? I'm using both -stdlib=libc++ and -std=cxx0x. I dont 
see them when I used just -stdlib=libc++ flag.

Thanks,
Ashok


On 6/26/2012 1:30 AM, Dimitry Andric wrote:
> On 2012-06-26 04:22, Ashok Nalkund wrote:
> ...
>>>
/local/mnt/workspace/ashoknn/519_libcxx_transition/llvm/src/tools/bugpoint/ToolRunner.cpp:131:12:
error: invalid operands to binary expression ('llvm::raw_ostream' and
'std::ostringstream'
>>>        (aka 'basic_ostringstream<char>'))
>>>      errs() << OS;
>>>      ~~~~~~ ^  ~~
>>
>
> Hi Ashok, please try applying this diff from r155978 to your 3.1 release
tree:
>
> --- llvm/trunk/tools/bugpoint/ToolRunner.cpp	2012/05/02 05:31:31	155977
> +++ llvm/trunk/tools/bugpoint/ToolRunner.cpp	2012/05/02 05:39:10	155978
> @@ -128,7 +128,7 @@
>         ErrorFile.close();
>       }
>
> -    errs() << OS;
> +    errs() << OS.str();
>     }
>
>     return ReturnCode;
>