[CMake] Diff output from CMake?

[Federico Carminati]

Dear All,
    is there a way to specify the link command in CMake? If I specify

export LD=/usr/bin/ld ; cmake $MY_SOURCE_DIRECTORY

it is not taken and if I set 

cmake $MY_SOURCE_DIRECTORY \
 -DCMAKE_C_LINK_EXECUTABLE=ld \
 -DCMAKE_CXX_LINK_EXECUTABLE=ld

what I observe is that the "entire" link command is replaced by "just" ld. Am I missing something? 

[/Users/fca] cmake -version
cmake version 2.8.4.20110216-gaec6

Thanks a lot in advance for the help. Best, 

Federico Carminati
CERN-PH 
1211 Geneva 23
Switzerland
Tel: +41 22 76 74959
Fax: +41 22 76 68505
Mobile: +41 76 487 4843