[CMake] C++11 flag not being added

[Petr Bena]

What do you mean by "target" property? I don't see any target
mentioned there. I don't have this line in there. I don't know which
CMake this is, it failed on server we use for unit tests, but I have
required min. version set to 2.8.7



On Thu, Oct 15, 2015 at 5:41 PM, Matthew S Wallace
<mwallace at ccmtrading.com> wrote:
> What version of CMake are you using?  I’m using 3.3.2.  The only other thing I did was:
>
> set_property(GLOBAL PROPERTY CXX_STANDARD_REQUIRED)
>
> I’m guessing this probably does nothing since it is probably a target property.
>
> -Matt
>
>> On Oct 15, 2015, at 10:34 AM, Petr Bena <benapetr at gmail.com> wrote:
>>
>> Can you elaborate on it a bit?
>>
>> I put set(CMAKE_CXX_STANDARD 11) as first line of my CMakeLists and it
>> still doesn't work, without the hack I used I get errors while
>> compiling.
>>
>> Can you give me example file in which it works? I guess there is more
>> needed for it to work.
>>
>> On Tue, Oct 13, 2015 at 7:12 PM, Matthew S Wallace
>> <mwallace at ccmtrading.com> wrote:
>>> Thanks, setting the global variable solved my issue.
>>>
>>> -Matt
>>>
>>>> On Oct 13, 2015, at 10:46 AM, Johannes Zarl-Zierl <johannes.zarl-zierl at jku.at> wrote:
>>>>
>>>> Hi,
>>>>
>>>> CXX_STANDARD is a target property, not a global one. You can either set
>>>> CXX_STANDARD for every target that needs it, or set it globally by changing
>>>> the default value.
>>>>
>>>> You can do the latter by setting the variable CMAKE_CXX_STANDARD  before
>>>> defining any target that depends on it:
>>>>
>>>> set(CMAKE_CXX_STANDARD 11)
>>>>
>>>> HTH,
>>>> Johannes
>>>>
>>>> On Tuesday 13 October 2015 10:22:36 Matthew S Wallace wrote:
>>>>> I have the following two lines in my CMakeLists.txt
>>>>>
>>>>> set_property(GLOBAL PROPERTY CXX_STANDARD 11)
>>>>> set_property(GLOBAL PROPERTY CXX_STANDARD_REQUIRED)
>>>>>
>>>>> However when compiling some of my source files, the -std=c++11 flag is not
>>>>> added.
>>>>>
>>>>> Just for good measure I added:
>>>>> target_compile_features(my_target PRIVATE cxx_strong_enums) to the target
>>>>> that was having the problem.
>>>>>
>>>>> Not sure if it matters, but in this case the compile error I’m getting is
>>>>> complaining because I’m referencing a fully scoped enum.  If I explicitly
>>>>> include -std=c++11 in my compile flags, everything works.
>>>>>
>>>>> I’m thinking I’m probably just misunderstanding how CXX_STANDARD works, but
>>>>> any help would be appreciated.
>>>>>
>>>>> -Matt
>>>>
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