[ITK] [ITK-users] C++11?

[Bradley Lowekamp]

Hello,

Just to further elaborate, in the cmake configuration you need to add "-std=c++11", to CMAKE_CXX_FLAGS on the command line before the first configuration something like:

cmake -DCMAKE_CXX_FLAGS="-std=c++11" /your/source/ITK

Alternatively you can set the CXX_FLAGS environment variable similarly. Either way this should be  done a new build directory with a clean configuration, not a reconfiguration.

Additionally, project that use this C++11 build of ITK should use the same flag.

Brad

On Apr 13, 2014, at 11:33 AM, Johnson, Hans J <hans-johnson at uiowa.edu> wrote:

> Jared,
> 
> ADD_DEFINTIONS is not intended for compiler flags.  You need to configure
> the build initializing with the C++ flags
> 
> CXX=Œ/usr/bin/clang¹ CXX_FLAGS=³-std=c++11²  ccmake ../ITK
> 
> Hans
> 
> 
> 
> On 4/12/14, 10:41 PM, "Becksfort, Jared" <Jared.Becksfort at STJUDE.ORG>
> wrote:
> 
>> Hello,
>> 
>> I was hoping to build the 4.5.2 with C++11.  Are there instructions for
>> doing so?  I tried adding
>> 
>> ADD_DEFINITIONS(
>>   -std=c++11
>> )
>> 
>> to the CMakeLists.txt file, which felt like a hack and didn't work:
>> 
>> Scanning dependencies of target itksys
>> [ 21%] Building C object
>> Modules/ThirdParty/KWSys/src/KWSys/CMakeFiles/itksys.dir/ProcessUNIX.c.o
>> error: invalid argument '-std=c++11' not allowed with 'C/ObjC'
>> make[2]: ***
>> [Modules/ThirdParty/KWSys/src/KWSys/CMakeFiles/itksys.dir/ProcessUNIX.c.o]
>> Error 1
>> make[1]: ***
>> [Modules/ThirdParty/KWSys/src/KWSys/CMakeFiles/itksys.dir/all] Error 2
>> make: *** [all] Error 2
>> 
>> Thanks,
>> Jared
>> 
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> 
> 
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