[cmake-developers] CMake identifies MacOSX10.7-Xcode43-ub as GNU, but it runs clang.

[Brad King]

On 04/28/2014 01:07 PM, Brad King wrote:
> It looks like in this case users will have to tell Xcode what tool
> to use up front using the CMake generator toolset feature (cmake -T).
> I think this is acceptable because it only affects old Xcode versions.
> Otherwise we will need a much more complicated compiler id bootstrap
> process

Actually it is not so complicated because the determination of
the sysroot and deployment target does not depend on the language.
I just had to introduce a platform-specific initialization step
after the system is determined but before the compilers are:

 Add platform-specific initialization step when enabling languages
 http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=416761e3

 OS X: Factor a Darwin-Initialize module out of Platform/Darwin
 http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=0200d0a9

 Xcode: Use sysroot and deployment target to identify compiler
 http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=0cce556b

Now the Xcode compiler identification finds the right one.
I've reverted my change to the machine-specific dashboard
script.

-Brad