[CMake] Configure Mac OS X for 32-bit

[Tron Thomas]

Before when I was using an earlier version of CMake, it would configure 
the project to build a 32-bit version of all the project target's 
regardless of which version of Mac OS X I was using.  It would also 
build just the platform specific version of the targets for a debug build.

Now that I have upgraded to CMake version 2.8.1, CMake wants to 
configure the project's targets to build for 64-bit on Mac OS X 10.6.

The only way I've found so far to make Mac OS X 10.6 build 32-bit, is to 
modify the CMAKE_OSX_ARCHITECTURES to include i386.  However, if I set 
CMAKE_OSX_ARCHITECTURES to only i386, then it will build create an Intel 
version of all targets when I build on a PowerPC system.  That means I 
won't be able to run and test the targets on that platform.

I'm trying to get things back to where they were before I upgraded to 
CMake 2.8.1.  I want it to configure Xcode to build 32-bit targets, with 
architecture specific version for debug builds.

How can someone accomplish this?

On 05/02/2010 01:58 AM, Michael Wild wrote:
> Well, setting CMAKE_OSX_ARCHITECTURES to i386 AND ppc is going to get 
> you a universal build, both of the architectures being 32-bit. So, 
> what is it exactly that you want?
>
> Michael Wild
>
> On Sun, May 2, 2010 at 8:15 AM, Tron Thomas <tron.thomas at verizon.net 
> <mailto:tron.thomas at verizon.net>> wrote:
>
>     It looks like:
>
>     set (CMAKE_OSX_ARCHITECTURES "i386 ppc")
>
>     will build a universal binary for a debug build on any platform.
>      How can someone configure things so that Xcode will build a
>     platform specific debug version that is 32-bit?
>
>
>
>     On 05/01/2010 04:55 PM, Mike Jackson wrote:
>
>         You need to set the CMAKE_OSX_ARCHITECTURES to i386. The
>         default build
>         on snow leopard is 64bit where as on leopard it is 32 bit.
>
>         -----
>         Mike Jackson www.bluequartz.net <http://www.bluequartz.net>
>         Principal Software Engineer mike.jackson at bluequartz.net
>         <mailto:mike.jackson at bluequartz.net>
>         BlueQuartz Software               Dayton, Ohio
>
>
>         On May 1, 2010, at 15:33, Tron Thomas<tron.thomas at verizon.net
>         <mailto:tron.thomas at verizon.net>>  wrote:
>
>
>             I am writing a cross platform application using CMake that
>             builds on
>             Mac OS X.  I just upgraded to CMake 2.8-1.  When I
>             configure and
>             build my project on my Power Mac G5 system running Mac OS
>             X 10.5.8,
>             the project builds just fine.
>
>             When I try to configure the project on my MacBook Pro
>             running Mac OS
>             X 10.6.3, I get link errors because the project has been
>             configured
>             to build 64-bit applications and some of the needed
>             libraries and
>             frameworks the project links with are only 32-bit.
>
>             How can I configure my CMake scripts so that the project
>             will build
>             a 32-bit application on my MacBook Pro?
>
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