To duplicate a CMake target in your project, you can use the add_custom_target or add_executable command along with the add_dependencies command to create a new target that depends on the original target. This way, when you build the new target, the original target will also be built as a dependency. You can also use the add_custom_command command to execute custom commands or scripts as part of the new target's build process. By duplicating a target in this way, you can create multiple versions of the same target with different settings or configurations.
Best C++ Books to Read of December 2024
How to troubleshoot issues related to duplicated CMake targets in a project?
- Check for duplicate target names: Open your CMakeLists.txt file and search for any duplicate target names. Make sure each target in your project has a unique name.
- Use different target names: If you find duplicate target names, rename one of them to make them unique.
- Use target properties: If you are using the add_library or add_executable commands to create targets, make sure you are using the correct target properties to distinguish between them. For example, you can use the OUTPUT_NAME property to set a different output name for each target.
- Check for accidental inclusion: Sometimes targets can be included multiple times in different parts of the CMakeLists.txt file or in separate files included in the project. Make sure each target is defined and included only once.
- Clean the build directory: If you have made changes to your CMakeLists.txt file, it is a good idea to clean your build directory and rebuild the project to ensure that the changes take effect.
- Use CMake tools for debugging: CMake provides tools for debugging such as --graphviz, --trace, and --debug-find. Use these tools to get more insights into the CMake configuration and identify any issues related to duplicated targets.
- Consult the CMake documentation: If you are still facing issues with duplicated targets, refer to the CMake documentation or seek help from the CMake community for further troubleshooting assistance.
How to create a copy of a CMake target?
To create a copy of a CMake target, you can use the add_custom_target command to define a new target that depends on the original target. Here's an example of how to create a copy of a CMake target named original_target:
1 2 3 4 5 6 7 8 |
# Define the original target add_executable(original_target source.cpp) # Create a copy of the original target add_custom_target(copy_target ALL DEPENDS original_target COMMAND ${CMAKE_COMMAND} -E copy $<TARGET_FILE:original_target> $<TARGET_FILE_DIR:copy_target> ) |
In this example, we first define the original target original_target using the add_executable command. Then, we create a new target named copy_target using the add_custom_target command. The copy_target target depends on the original_target target, ensuring that the original target is built before the copy is created. The COMMAND directive then uses the CMAKE_COMMAND and -E copy options to copy the output file of the original target to the output directory of the copy target.
You can customize the behavior of the copy target further by adding additional commands or options as needed.
How to duplicate a CMake target with custom compiler flags?
To duplicate a CMake target with custom compiler flags, you can create a new target that copies the properties of the original target, but with the added custom compiler flags. Here's an example:
1 2 3 4 5 6 7 8 |
# Original target add_executable(my_target main.cpp) # Copy properties of original target to new target add_executable(my_target_custom main.cpp) get_target_property(my_target_COMPILE_OPTIONS my_target COMPILE_OPTIONS) target_compile_options(my_target_custom PRIVATE ${my_target_COMPILE_OPTIONS}) target_compile_options(my_target_custom PRIVATE "-Wall") # Add custom compiler flag |
In this example, we first create the original target my_target with the source file main.cpp. Then, we create a new target my_target_custom and copy the compile options of my_target to it using get_target_property and target_compile_options. Finally, we add a custom compiler flag -Wall to my_target_custom.
This way, you have duplicated the original target with custom compiler flags added.
How to easily duplicate a CMake target using CMakeLists.txt file?
To easily duplicate a CMake target in your CMakeLists.txt file, you can use the following steps:
- Define your original target in your CMakeLists.txt file using the add_executable() or add_library() function.
For example:
1
|
add_executable(my_target source1.cpp source2.cpp)
|
- Use the add_executable() or add_library() function again to create a duplicate target with the same source files as the original target.
For example:
1
|
add_executable(duplicate_target source1.cpp source2.cpp)
|
- If you need to include any additional source files or dependencies for the duplicate target, you can simply add them within the add_executable() or add_library() function call.
For example:
1 2 |
add_executable(duplicate_target source1.cpp source2.cpp extra_source.cpp) target_link_libraries(duplicate_target some_library) |
By following these steps, you can easily duplicate a CMake target in your CMakeLists.txt file. This allows you to create multiple targets with the same or similar source files, allowing for more modular and organized project structures.
