How do I use conditional statements in CMake?

How do I use conditional statements in CMake?

In CMake, you can use if, elseif, and else to create conditional statements. For example:

if(CONDITION)
    # commands if CONDITION is true
elseif(OTHER_CONDITION)
    # commands if OTHER_CONDITION is true
else()
    # commands if neither CONDITION nor OTHER_CONDITION is true
endif()

Can you give me an example of a conditional statement in a CMakeLists.txt file?

Sure! Here's a simple example:

cmake_minimum_required(VERSION 3.10)
project(MyProject)

if(WIN32)
    message(STATUS "Building on Windows")
elseif(UNIX)
    message(STATUS "Building on Unix")
else()
    message(STATUS "Unknown platform")
endif()

What are some common conditions I can check in CMake?

Common conditions include checking for platform types like WIN32, UNIX, or checking for the existence of variables or files using EXISTS. You can also check for specific compiler features.

How can I combine multiple conditions in CMake?

You can combine conditions using logical operators like AND, OR, and NOT. For example:

if(CONDITION1 AND CONDITION2)
    # commands if both conditions are true
endif()