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Editorial Team
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Asked: 2026-06-16T05:22:33+00:00

I’ve got something like this in the CMakeLists file: set(CMAKE_CXX_FLAGS -g -Wextra -DFLAG1=A) Later

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I’ve got something like this in the CMakeLists file:

set(CMAKE_CXX_FLAGS "-g -Wextra -DFLAG1=A")

Later in the file, I need to check if FLAG1 has been defined. Is it possible to do something like this?

IF(${FLAG1} EQUAL A)
    #Do something
ELSE()
    #Do something else
ENDIF()
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1 Answer

  1. Editorial Team

    Well, you can do

    set(FLAG1 A)
set(CMAKE_CXX_FLAGS "-g -Wextra -DFLAG1=${FLAG1}")
...
if(${FLAG1} STREQUAL A)
...
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