[CMake] [ANNOUNCE] CMake 3.1.0-rc1 now ready for testing!

[Robert Dailey]

Why are quotations required for generator expressions using lists now?
Is there a technical reason for it? I think it's intuitive that it
worked without them.

It's never been clear in CMake when to use quotes or not outside of
the fact that if you're passing a parameter to a function with a space
in it, quotes will be necessary.

On Wed, Oct 29, 2014 at 3:52 PM, Daniel Schepler
<dschepler at scalable-networks.com> wrote:
> Thanks for the pointers, that does answer my question.  I would just set
> CXX_STANDARD to 11 and leave CXX_STANDARD_REQUIRED unset.
>
> --
>
> Daniel
>
>
>
> From: David Cole [mailto:DLRdave at aol.com]
> Sent: Wednesday, October 29, 2014 11:38 AM
> To: Daniel Schepler
> Cc: cmake at cmake.org
>
>
> Subject: Re: [CMake] [ANNOUNCE] CMake 3.1.0-rc1 now ready for testing!
>
>
>
> I think your question about CXX_STANDARD is answered in the CXX_STANDARD
> docs:
>
> http://www.cmake.org/cmake/help/v3.1/prop_tgt/CXX_STANDARD.html
>
>
>
> If you MUST have it, you can set this property to ON:
>
> http://www.cmake.org/cmake/help/v3.1/prop_tgt/CXX_STANDARD_REQUIRED.html
>
>
>
> (Although I've not used it myself -- not sure what happens if the compiler
> does not support the standard. Hopefully, an error at CMake time... try it
> and let us know if it works for you.)
>
>
>
>
>
> HTH,
>
> David C.
>
>
>
>
>
> On Wed, Oct 29, 2014 at 2:15 PM, Daniel Schepler
> <dschepler at scalable-networks.com> wrote:
>
> (Whoops, accidentally sent this via private email before.)
>
> My question was about this part of the example:
>
> add_executable(consumer_with consumer_with.cpp)
> target_link_libraries(consumer_with foo)
> set_property(TARGET consumer_with CXX_STANDARD 11)
>
> add_executable(consumer_no consumer_no.cpp)
> target_link_libraries(consumer_no foo)
>
> The question is: how do I detect whether CXX_STANDARD 11 is available before
> running the "set_property(TARGET consumer_with CXX_STANDARD 11)" line?
> --
> Daniel
>
>
>
> -----Original Message-----
> From: Robert Maynard [mailto:robert.maynard at kitware.com]
> Sent: Wednesday, October 29, 2014 10:43 AM
> To: Daniel Schepler
> Cc: CMake MailingList
> Subject: Re: [CMake] [ANNOUNCE] CMake 3.1.0-rc1 now ready for testing!
>
> You can find the known compile features that can be detected at:
> http://www.cmake.org/cmake/help/v3.1/prop_gbl/CMAKE_CXX_KNOWN_FEATURES.html
>
> At the end of the compile-features manual page (
> http://www.cmake.org/cmake/help/v3.1/manual/cmake-compile-features.7.html
> ) there is a section on how to mark a library as having conditional support
> on C++11 features.
>
>
> On Wed, Oct 29, 2014 at 12:58 PM, Daniel Schepler
> <dschepler at scalable-networks.com> wrote:
>> Where would I find the list of available C++ language features?  For
>> instance, I would suppose there's one for "auto", one for move
>> constructors/assignment operators, and one for "= delete" of default
>> constructors/destructors et al.  These are probably the ones we'd be most
>> interested in here, for the moment.  (Though with our requirements to
>> support older C++ compilers, we might not actually be able to use auto, as
>> the fallback would need the full type anyway.)  Also, is there a portability
>> macro provided for the "= delete" feature?
>>
>> Also, how would I mark a target so that it activates C++11 features if
>> available, but falls back to old C++ if not?  I do see the section on
>> detecting compiler features, but it's not clear to me how exactly how I'd
>> make the target use CXX_STANDARD 11 only if available.
>> --
>> Daniel
>>
>> --
>>
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