[CMake] CMake and OSX 10.5

[Ted Berg]

Am in the process of setting up a OSX 10.5 build box and I'm seeing a 
couple of issues:

1. link command line is getting -F/System/Library/Frameworks added 
automatically, which causes problems when I try to build against the 
10.4u sdk.  This issue is present in the 2.4.7 and the 
cmake-2.4.8.tar.gz release candidate.  This issue appears to be fixed in 
cvs.

2. When I don't run into issue #1 and am building against the 10.4u SDK 
I get the following linker error:

ld: library not found for -ldylib1.10.5.o
collet2: ld returned 1 exit status

This library exists in /Developer/SDKs/MacOSx10.5.sdk/usr/lib/ and in 
/usr/lib.  There is no corresponding library for 10.4 that I have found. 
  How do I disable the inclusion of this library in my link phase?  I am 
building against the 10.4u sdk and this library is probably not going to 
be available on most of my target computers.

Thank you

Ted