[CMake] Chaining cmake project building

[J Decker]

I have a chain of cmakelists that have to be run in sequence with some
other commands inbetween...  I have been working on a cmakelists.txt
which builds the project...

This is a simple project that demonstrates the issue...

----------------- CMakeLists.txt ----------------------
cmake_minimum_required(VERSION 2.8)

project( test_build_all )


macro( BuildProject ARG1 EXTRA_FLAGS)
   message( "[${EXTRA_FLAGS}]" )
   add_custom_target( Build${ARG1}
       COMMAND echo ${EXTRA_FLAGS}
       )
endmacro( BuildProject )

set( EXTRA_FLAGS "-DOPTION1=ON -DOPTION2=OFF" )
BuildProject( Test1 ${EXTRA_FLAGS} )

set( EXTRA_FLAGS -DOPTION1=ON -DOPTION2=OFF )
BuildProject( Test2 ${EXTRA_FLAGS} )

set( EXTRA_FLAGS -DOPTION1=ON\ -DOPTION2=OFF )
BuildProject( Test3 ${EXTRA_FLAGS} )

----------------- END ----------------------


The above script makes scripts which build 3 targets that prints a
message during configuration and runs a simple echo command.

cmake output (see no quotes)
[-DOPTION1=ON -DOPTION2=OFF]
[-DOPTION1=ON]
[-DOPTION1=ON -DOPTION2=OFF]

generated output
BuildTest1 : echo "-DOPTION1=ON -DOPTION2=OFF"
BuildTest2 : echo -DOPTION1=ON
BuildTest3 : echo "-DOPTION1=ON -DOPTION2=OFF"


The problem is; there are no Quotes in the command 'echo
${EXTRA_FLAGS}'  but yet the command gets the quotes.
There are really NO quotes anywhere in the case of BuildTest3, but the
command has quotes when issuing the command line.

--------------

What the intent is is to be able to define one or more addional -D
flags that get passed to a cmake command instead of an echo command,
but with the extra quotes, the second (and further) defined values are
unreachable.

How can I set(EXTRA_FLAGS) that I can pass it as a single thing to a
macro parameter to be used in add target.

I did test that this is not a specific issue with visual studio 2010,
and if it is, it's also an issue with mingw makefiles also [aka I
tested a couple of generators and both did the same thing].