llvm dev - Oct 2013 - [LLVMdev] [lld][Windows] Warning during builds

C:\Program Files (x86)\Microsoft Visual Studio 
11.0\VC\include\concrt.h(313): warning C4530: C++ exception handler 
used, but unwind semantics are not enabled. Specify /EHsc 
(C:\lld-x86_64_win7\lld-x86_64-win7\llvm.src\tools\lld\lib\ReaderWriter\ELF\Hexagon\HexagonLinkingContext.cpp)
[C:\lld-x86_64_win7\lld-x86_64-win7\llvm.obj\tools\lld\lib\ReaderWriter\ELF\Hexagon\lldHexagonELFTarget.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio 
11.0\VC\include\concrt.h(313): warning C4530: C++ exception handler 
used, but unwind semantics are not enabled. Specify /EHsc 
(C:\lld-x86_64_win7\lld-x86_64-win7\llvm.src\tools\lld\lib\ReaderWriter\ELF\Hexagon\HexagonTargetHandler.cpp)
[C:\lld-x86_64_win7\lld-x86_64-win7\llvm.obj\tools\lld\lib\ReaderWriter\ELF\Hexagon\lldHexagonELFTarget.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio 
11.0\VC\include\concrt.h(313): warning C4530: C++ exception handler 
used, but unwind semantics are not enabled. Specify /EHsc 
(C:\lld-x86_64_win7\lld-x86_64-win7\llvm.src\tools\lld\lib\ReaderWriter\ELF\Hexagon\HexagonRelocationHandler.cpp)
[C:\lld-x86_64_win7\lld-x86_64-win7\llvm.obj\tools\lld\lib\ReaderWriter\ELF\Hexagon\lldHexagonELFTarget.vcxproj]
   lldHexagonELFTarget.vcxproj -> 
C:\lld-x86_64_win7\lld-x86_64-win7\llvm.obj\lib\Release\lldHexagonELFTarget.lib

Get this error while building on windows, is there a flag thats missing 
compilation ?

Thanks

Shankar Easwaran

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the
Linux Foundation

On 07/10/13 11:21, Shankar Easwaran wrote:
> C:\Program Files (x86)\Microsoft Visual Studio
> 11.0\VC\include\concrt.h(313): warning C4530: C++ exception handler
> used, but unwind semantics are not enabled. Specify /EHsc
>
(C:\lld-x86_64_win7\lld-x86_64-win7\llvm.src\tools\lld\lib\ReaderWriter\ELF\Hexagon\HexagonLinkingContext.cpp)
>
[C:\lld-x86_64_win7\lld-x86_64-win7\llvm.obj\tools\lld\lib\ReaderWriter\ELF\Hexagon\lldHexagonELFTarget.vcxproj]
> 
> <snip>
> 
> Get this error while building on windows, is there a flag thats missing
> compilation ?
> C++ exception handler used, but unwind semantics are not enabled.
> Specify /EHsc
Specify /EHsc

Ben

On Sun, Oct 6, 2013 at 8:21 PM, Shankar Easwaran <shankare at
codeaurora.org>wrote:
> C:\Program Files (x86)\Microsoft Visual Studio
> 11.0\VC\include\concrt.h(313): warning C4530: C++ exception handler used,
> but unwind semantics are not enabled. Specify /EHsc
> (C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.src\tools\lld\**
> lib\ReaderWriter\ELF\Hexagon\**HexagonLinkingContext.cpp)
> [C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.obj\tools\lld\**
> lib\ReaderWriter\ELF\Hexagon\**lldHexagonELFTarget.vcxproj]
> C:\Program Files (x86)\Microsoft Visual Studio
> 11.0\VC\include\concrt.h(313): warning C4530: C++ exception handler used,
> but unwind semantics are not enabled. Specify /EHsc
> (C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.src\tools\lld\**
> lib\ReaderWriter\ELF\Hexagon\**HexagonTargetHandler.cpp)
> [C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.obj\tools\lld\**
> lib\ReaderWriter\ELF\Hexagon\**lldHexagonELFTarget.vcxproj]
> C:\Program Files (x86)\Microsoft Visual Studio
> 11.0\VC\include\concrt.h(313): warning C4530: C++ exception handler used,
> but unwind semantics are not enabled. Specify /EHsc
> (C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.src\tools\lld\**
> lib\ReaderWriter\ELF\Hexagon\**HexagonRelocationHandler.cpp)
> [C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.obj\tools\lld\**
> lib\ReaderWriter\ELF\Hexagon\**lldHexagonELFTarget.vcxproj]
>   lldHexagonELFTarget.vcxproj -> C:\lld-x86_64_win7\lld-x86_64-**
> win7\llvm.obj\lib\Release\**lldHexagonELFTarget.lib
>
> Get this error while building on windows, is there a flag thats missing
> compilation ?
>
> Thanks
>
> Shankar Easwaran
>
> --
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted
> by the Linux Foundation
>
>
This is from ConcRT. The warning doesn't matter as I believe it only uses
exceptions to rethrow exceptions from user code. Which we don't do.

- Michael Spencer
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On 10/7/2013 3:08 PM, Michael Spencer wrote:
> On Sun, Oct 6, 2013 at 8:21 PM, Shankar Easwaran <shankare at
codeaurora.org>wrote:
>
>> C:\Program Files (x86)\Microsoft Visual Studio
>> 11.0\VC\include\concrt.h(313): warning C4530: C++ exception handler
used,
>> but unwind semantics are not enabled. Specify /EHsc
>> (C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.src\tools\lld\**
>> lib\ReaderWriter\ELF\Hexagon\**HexagonLinkingContext.cpp)
>> [C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.obj\tools\lld\**
>> lib\ReaderWriter\ELF\Hexagon\**lldHexagonELFTarget.vcxproj]
>> C:\Program Files (x86)\Microsoft Visual Studio
>> 11.0\VC\include\concrt.h(313): warning C4530: C++ exception handler
used,
>> but unwind semantics are not enabled. Specify /EHsc
>> (C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.src\tools\lld\**
>> lib\ReaderWriter\ELF\Hexagon\**HexagonTargetHandler.cpp)
>> [C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.obj\tools\lld\**
>> lib\ReaderWriter\ELF\Hexagon\**lldHexagonELFTarget.vcxproj]
>> C:\Program Files (x86)\Microsoft Visual Studio
>> 11.0\VC\include\concrt.h(313): warning C4530: C++ exception handler
used,
>> but unwind semantics are not enabled. Specify /EHsc
>> (C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.src\tools\lld\**
>> lib\ReaderWriter\ELF\Hexagon\**HexagonRelocationHandler.cpp)
>> [C:\lld-x86_64_win7\lld-x86_**64-win7\llvm.obj\tools\lld\**
>> lib\ReaderWriter\ELF\Hexagon\**lldHexagonELFTarget.vcxproj]
>>    lldHexagonELFTarget.vcxproj -> C:\lld-x86_64_win7\lld-x86_64-**
>> win7\llvm.obj\lib\Release\**lldHexagonELFTarget.lib
>>
>> Get this error while building on windows, is there a flag thats missing
>> compilation ?
>>
>> Thanks
>>
>> Shankar Easwaran
>>
>> --
>> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted
>> by the Linux Foundation
>>
>>
> This is from ConcRT. The warning doesn't matter as I believe it only
uses
> exceptions to rethrow exceptions from user code. Which we don't do.
Thanks Michael.


-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the
Linux Foundation