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How to Access the Source File Name In Cmake?

2 minutes read

In CMake, you can access the source file name by using the ${CMAKE_CURRENT_SOURCE_DIR} variable. This variable contains the full path to the current source directory where the CMakeLists.txt file is located. You can concatenate this variable with the name of the specific file you want to access to get the full path to that file in your CMake script. This can be useful when you need to reference specific source files in your project for things like compiling, linking, or copying files during the build process.


How to access the file name without directory path in CMake?

You can access the file name without the directory path in CMake by using the basename command. Here's an example:

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file(RELATIVE_PATH REL_PATH ${CMAKE_CURRENT_SOURCE_DIR} ${FILE_PATH})

get_filename_component(FILE_NAME ${FILE_PATH} NAME)

message("File name without directory path: ${FILE_NAME}")


In this example, FILE_PATH is the full path of the file you want to get the name of. The get_filename_component command is used to extract the file name from the full path, and the message command is used to display the file name without the directory path.


How to access the directory path of a source file in CMake?

In CMake, you can access the directory path of a source file using the CMAKE_CURRENT_SOURCE_DIR variable. This variable stores the full path to the current source directory being processed by CMake.


You can use this variable in your CMakeLists.txt file to access the directory path of a specific source file like this:

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# Get the directory path of a source file
get_filename_component(SOURCE_DIR "path/to/source/file.cpp" DIRECTORY)

message("Directory path of source file: ${SOURCE_DIR}")


This code snippet will print the directory path of the specified source file "path/to/source/file.cpp". You can replace this file path with the actual path of the source file you want to get the directory path for.


What is the "CMAKE_CURRENT_SOURCE_FILE" variable used for in CMake?

The "CMAKE_CURRENT_SOURCE_FILE" variable in CMake is a read-only variable that contains the full path to the CMakeLists.txt file currently being processed. This variable can be used to access and manipulate the path to the current CMakeLists.txt file within the CMake scripts, allowing for dynamic and flexible build configurations.

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