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If you change the default value in the CMakeLists but the actual value is already stored in the cache, it will just load the value from the cache. So to test the logic in your CMakeLists, delete the cache each time before re-running CMake.

You could probably use cmake-gui to setup all the variables, I'm not sure if it is possible to do the initial setup from cmake-gui though.

Conditional Statement (if) ... There are two allowable syntaxes: if(something) do something else(something) # the argument must match the if(...) ...

CMake normal variables can be used without ${} evaluation in several contexts including if() statements. Cache and Environment variables do need ...

That's because the value of the option is stored in the cache ( CMakeCache.txt ). If you change the default value in the CMakeLists but the ...

Writing CMakeLists Files. ¶. This chapter will cover the basics of writing effective CMakeLists files for your software. It will cover the basic commands and issues you will need to handle most projects. While CMake can handle extremely complex projects, for most projects you will find this chapter’s contents will tell you all you need to know.

Jul 02, 2018 · Step 2: See what CMakeLists.txt is by getting your hands dirty – on the Shell and/or IDE. Create a package in your catkin workspace (we won’t add any code here since it’s not needed for the demo). If you are using the ROS Development Studio and copied the ROS project, the package is already there! user:~/catkin_ws/src$ catkin_create_pkg ...

If the result is true, then the commands in the if block are executed. ... The following syntax applies to the condition argument of the if , elseif and ...

The CMake language provides three flow control constructs to help organize your CMakeLists files and keep them maintainable. Conditional statements (e.g. if) Looping constructs (e.g. foreach and while) Procedure definitions (e.g. macro and function) Conditional Statements ¶ First we will consider the if command.

Conditionally execute a group of commands. ... Evaluates the given expression. If the result is true, the commands in the THEN section are invoked. Otherwise, the ...

The Kconfig file is automatically detected when placed in the application directory, but it is also possible for it to be found elsewhere if the CMake variable ...

Learn how to define variables with set and use them with the ${} operator for variable references. Learn the syntax for conditionals in CMake: if - elseif - ...

Each directory's CMakeLists file defines what the buildsystem should do in that specific directory. It also defines which subdirectories CMake should handle as well. Typical actions include: Build a library or an executable out of some of the source files in this directory. Add a filepath to the include-path used during build.

If KEYWORD is a generator expression or variable that evaluates to 0 or 1, value is substituted if 1 and not if 0. You can nest generator expressions, and you ...

cmake_minimum_required (VERSION 2.8.10). project (BoringSSL). if(ANDROID). # Android-NDK CMake files reconfigure the path and so Go and Perl won't be.

May 29, 2021 · CMakeLists.txt file contains a set of directives and instructions describing the project's source files and targets (executable, library, or both). When you create a new project, CLion generates CMakeLists.txt file automatically and places it in the project root directory.

02.07.2018 · The file CMakeLists.txt is the input to the CMake build system for building software packages. Any CMake-compliant package contains one or more CMakeLists.txt file that describe how to build the code and where to install it to. Well, now you can see why renaming the file isn’t a good idea. But what about commenting out parts of the file?

Basic Expressions ¶ if (<constant>) True if the constant is 1, ON, YES, TRUE, Y , or a non-zero number (including floating point numbers). False if the constant is 0, OFF , NO, FALSE, N, IGNORE, NOTFOUND, the empty string, or ends in the suffix -NOTFOUND. Named boolean constants are case-insensitive.

Evaluates the given expression. If the result is true, the commands in the THEN section are invoked. Otherwise, the commands in the else section are invoked.

I had a similar problem and was able to solve it using a slightly different approach. I needed some compilation flags to be added in case cmake was invoked with an option from the command line (i.e cmake -DUSE_MY_LIB=ON).If the option was missing in the cmake invocation I wanted to go back to default case which was turning the option off.. I ran into the same issues, where the value for this ...

CMake is a tool for defining and managing code builds, primarily for C++. CMake is a cross-platform tool; the idea is to have a single definition of how the project is built - which translates into specific build definitions for any supported platform. It accomplishes this by pairing with different platform-specific buildsystems; CMake is an ...