CMake warning wrt frameworks during configure phase on Snow Leopard

[MK-MacPorts at techno.ms]

Just by accident I've found on my Snow Leopard this warning in the log file of one of my ports:
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:info:configure -- The C compiler identification is GNU 4.2.1
:info:configure -- The CXX compiler identification is GNU 4.2.1
:info:configure CMake Warning at /opt/macports-test/share/cmake-2.8/Modules/Platform/Darwin.cmake:290 (message):
:info:configure   The SDK Library/Frameworks path
:info:configure
:info:configure    //Library/Frameworks
:info:configure
:info:configure   is not set up correctly on this system.  This is known to occur when
:info:configure   installing Xcode 3.2.6:
:info:configure
:info:configure    http://bugs.python.org/issue14018
:info:configure
:info:configure   The problem may cause build errors that report missing system frameworks.
:info:configure   Fix your SDK symlinks to resolve this issue and avoid this warning.
:info:configure Call Stack (most recent call first):
:info:configure   /opt/macports-test/share/cmake-2.8/Modules/CMakeSystemSpecificInformation.cmake:36 (include)
:info:configure   CMakeLists.txt:2 (PROJECT)
:info:configure
:info:configure
:info:configure -- Checking whether C compiler has -isysroot
:info:configure -- Checking whether C compiler has -isysroot - yes
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Apart from this the port builds fine.

The suggested fix in http://bugs.python.org/issue14018 is "to manually fix the symlinks in /Developer/SDKs/MacOSX10.6.sdk …" !

Hmmm… I don't know what and how to fix this.

Any ideas?