[CMake] OSX deployment target confusion for 2.8.10

[Matthew Brett]

Hi,

On Mon, Nov 5, 2012 at 7:57 AM, Brad King <brad.king at kitware.com> wrote:
> On 11/04/2012 07:59 PM, Bradley Giesbrecht wrote:
>> The problem is in commit e7e613e. Patching Darwin.cmake back to revision 43b74793 solves the problem.
>>
>> The breakage is here:
>> http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=e7e613efbf1da45a2a9e51d11a4022589d79c642
>
> Thanks for tracking it down that far.  However, I think it is
> 43b74793 that actually introduced the problem.  The later
> commit only changed the appearance of the error message.
>
>> On Nov 3, 2012, at 7:06 PM, Matthew Brett wrote:
>>> export CMAKE_OSX_SYSROOT=/Developer/SDKs/MacOSX10.6.sdk/
>
> CMake does not read this variable from the environment.  Try
>
>  export SDKROOT=/Developer/SDKs/MacOSX10.6.sdk
>
> instead to work around this.

This does get the compilation past that error message, but on to
another (that I do not get for cmake 2.8.9).  I will try and debug
further.

>>> If I grep for 'DEPLOYMENT' in the PySide sources, I find nothing - so
>>> I do not believe these variables are being set by PySide.
>
> I suspect that python is setting MACOSX_DEPLOYMENT_TARGET.

It is perfectly possible that python distutils does set this, it
certainly checks for this in the Python configuration.

> I can reproduce this in a small test case by building with
> MACOSX_DEPLOYMENT_TARGET=10.6 set in my environment on a
> 10.7 host.
>
> This should fix it:
>
>  http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=15f5764e
>
> -Brad

Thanks a lot for the help,

Matthew