[cmake-developers] C++11 and target_compiler_feature proposal

[Brad King]

On 10/11/2013 02:04 PM, Sean McBride wrote:
> On Fri, 11 Oct 2013 13:56:23 -0400, Brad King said:
>> No, sorry.  What does "combined gcc+clang" mean?
> 
> He's probably referring to so-called 'llvm-gcc':

Ah, thanks Sean.  The machines are at least:

* dashmacmini4 has Xcode 3.2 with llvm-gcc-4.2:

   #define __GNUC__ 4
   #define __GNUC_MINOR__ 2
   #define __GNUC_PATCHLEVEL__ 1
   #define __APPLE_CC__ 5646
   #define __llvm__ 1

* dashmacmini5 has Xcode 4.1 with llvm-gcc-4.2:

   #define __GNUC__ 4
   #define __GNUC_MINOR__ 2
   #define __GNUC_PATCHLEVEL__ 1
   #define __APPLE_CC__ 5658
   #define __llvm__ 1

They do not define __clang__, and CMake's compiler id detection
does not pay attention to __llvm__.  I do not know what feature
sets they support, but it is probably safe to assume GNU 4.2.1
feature support at least.

-Brad