[CMake] cmake on Snow Leopard

[Michael Jackson]

I don't think CMake automatically builds Universal Binaries. CMake  
will look at the arch of the host system and try to build that arch,  
which is i386 on intel or "ppc" on anything else. Unless there is  
something in your project where you are setting the  
CMAKE_OSX_ARCHETECTURES to i386;ppc then that probably is not the  
problem. Also, Snow Leopard _will_ run a PPC app if you have it  
install the Rosetta environment. Apple would still need to allow for  
the building of Universal Apps for targeting 10.4 and 10.5 systems.

    Did you start with a completely clean build directory or was the  
build directory left over from 10.5? What OS X SDK are you trying to  
use:

from this page <http://lists.apple.com/archives/Xcode-users/2007/Oct/msg00696.html 
 >

You also need to pass -mmacosx-version-min=10.4 in order to build a  
binary that will link against the 10.4u SDK and run on the 10.4 system.

http://lists.apple.com/archives/darwin-dev/2007/Feb/msg00030.html


this person also has the problem <http://stackoverflow.com/questions/1349886/cmake-settings-on-snow-leopard 
 >

I bet there is an issue with the Darwin.cmake down in /Applications/ 
CMake 2.6-4.app/Contents/share/cmake-2.6/Modules/Platform/. I helped  
write some of the innards in that file and it may be be detecting  
things correctly and defaulting to another SDK instead of the 10.6 SDK.

  Please post the following variables from your project after a first  
run of cmake on your project from a clean build directory.

  CMAKE_OSX_ARCHITECTURES
  CMAKE_OSX_SYSROOT


On Aug 30, 2009, at 8:21 PM, Celil Rufat wrote:

> Hello,
>
> I recently installed Snow Leopard, and I am having trouble building  
> my application with CMake. The Unix Makefile generator fails while  
> checking for a working gcc compiler with the following output:
>
> CMake Error at /Applications/CMake 2.6-4.app/Contents/share/ 
> cmake-2.6/Modules/CMakeTestCCompiler.cmake:32 (MESSAGE):
>   The C compiler "/Developer/usr/bin/gcc" is not able to compile a  
> simple
>   test program.
>
> ld: library not found for -lcrt1.10.5.o
> collect2: ld returned 1 exit status
> make[1]: *** [cmTryCompileExec] Error 1
> make: *** [cmTryCompileExec/fast] Error 2
>
> I think the problem is in the fact that Snow Leopard no longer  
> supports powerpc binaries and cmake is still trying to build my  
> application as universal binaries instead of just building intel  
> binaries.
>
> Has anybody tries to use cmake on Snow Leopard? Can you suggest a  
> workaround this issue? Is there a way to disable universal binaries  
> and just build my application for the intel processor?
>
> Thanks,
> Celil
>
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