[Rock-dev] using c++11 CMAKE_CXX_FLAGS

[Martin Zenzes]

On 12/08/2014 11:51 AM, Leif Christensen wrote:
> Hi,
>
> I was wondering, if using the c++11 standard in my lib (perhaps later
> using base-types) would break any Rock stuff? Couldn't image how, but
> just to be sure.
>
> Using it like this in my CMakeLists.txt
>> list(APPEND CMAKE_CXX_FLAGS "-std=c++11 ${CMAKE_CXX_FLAGS}")
I never used this idiom. But as stated here [1]:

 > If you specify any CMAKE_CXX_FLAGS from the command line, the second 
method will produce a semicolon in the build command (and repeat the 
original CMAKE_CXX_FLAGS twice)

The following solution is suggested here [2]:

 > set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

Most of the time I use "add_definitions()" for flags like these, which 
works most of the time but is actually "wrong"...

[1] 
https://stackoverflow.com/questions/10851247/how-to-activate-c-11-in-cmake#comment24241515_10852679
[2] http://stackoverflow.com/a/20826165/3520187

Martin

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M.Sc. Martin Zenzes
Space Robotics

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