How to build a program with 2 different values of a variable in CMake

Question

I\'ve recently ported my Qt project from qmake to CMake. My main program contains a value which depends on a #define directiv

Answer 1

Are you sure that set_target_properties does not work? How about this one:

set_target_properties(myAppV1 PROPERTIES COMPILE_FLAGS "-DBUILDTYPE=1")

or:

set_target_properties(myAppV1 PROPERTIES COMPILE_DEFINITIONS "BUILDTYPE=1")

On my machine it works:

add_executable(myAppV1 main.cpp)
add_executable(myAppV2 main.cpp)
set_target_properties(myAppV1 PROPERTIES COMPILE_DEFINITIONS "BUILDTYPE=1")
set_target_properties(myAppV2 PROPERTIES COMPILE_DEFINITIONS "BUILDTYPE=2")

Answer 2

Another way could be:

mkdir two directory
buildflavor1
buildflavor2

In the first sub directory run:

cmake -DFLAVOR=OPTION1 ..

in the second run:

run cmake -DFLAVOR=OPTION2 ..

So two executable with same name with different compilation flag with is own feature .o and so on.