[CMake] Spaces in a command

[Bill Newcomb]

I want to add stuff to a custom command based on some definition:

cmake_minimum_required(VERSION 2.6)

set(DO_RELAX 1)
if(DO_RELAX)
    set(OR_RELAX "|| echo \"no big deal\"")
else()
    set(OR_RELAX "")
endif()

add_custom_command(OUTPUT foo COMMAND generate-foo ${OR_RELAX})
add_custom_target(do-foo ALL DEPENDS foo)


However, this produces the following rule in the generated makefile:

foo:
        $(CMAKE_COMMAND) -E cmake_progress_report /home/bnewcomb/tmp/cmake-tests/custom-or/CMakeFiles $(CMAKE_PROGRESS_1)
        @$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --blue --bold "Generating foo"
        generate-foo ||\ echo\ "no\ big\ deal"

Is there some way I can get cmake to not escape all of the 
spaces in the value of OR_RELAX?

Thanks,
B.

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