To remove a component from the result of the 'find_path' function in CMake, you can use the 'NO_DEFAULT_PATH' option when calling the function. This option tells CMake not to search in the default system paths for the specified component.
For example, if you want to find a path for a library named 'Foo' but do not want CMake to search in the default system paths, you can use the following code:
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find_path(FOO_INCLUDE_DIR Foo.h NO_DEFAULT_PATH)
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This will only search in the paths specified by the CMake variable 'CMAKE_INCLUDE_PATH' and any other user-specified paths, but not in the default system paths.
Additionally, you can also use the 'HINTS' option to specify additional paths for CMake to search for the component. This can be useful if you want to provide specific paths for CMake to search, rather than relying on the default system paths.
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How to modify the behavior of 'find_path' to exclude certain components in CMake?
To modify the behavior of find_path to exclude certain components in CMake, you can use the NO_DEFAULT_PATH option to prevent the function from searching certain paths. You can also use the NO_CMAKE_PATH option to exclude the default CMake-specific directories from the search. Additionally, you can use the PATHS option to specify custom paths to search and exclude the directories you don't want to include.
Here is an example of how you can modify the behavior of find_path to exclude certain components:
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find_path(MY_PATH_INCLUDE NAMES my_header.h PATHS /path/to/search NO_DEFAULT_PATH NO_CMAKE_PATH ) if(MY_PATH_INCLUDE) message(STATUS "Found my_header.h at: ${MY_PATH_INCLUDE}") else() message(FATAL_ERROR "Could not find my_header.h") endif() |
In this example, the find_path function will search for my_header.h only in the specified path /path/to/search and will exclude the default paths and the CMake-specific directories from the search.
You can adjust the options and paths according to your requirements to exclude certain components in the find_path function.
What is the recommended way to filter out components from the result of 'find_path' in CMake?
One recommended way to filter out components from the result of 'find_path' in CMake is to use the 'MATCHES' operator along with a regular expression to specify which components to include or exclude in the result.
For example, if you want to exclude a certain component named 'excluded_component' from the result, you can use the following syntax:
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find_path(MY_PATH include PATHS /path/to/search PATH_SUFFIXES path_suffix ) # Filter out 'excluded_component' from the result list(FILTER MY_PATH EXCLUDE REGEX ".*excluded_component.*") |
This will exclude any component containing the string 'excluded_component' from the result stored in the 'MY_PATH' variable. You can customize the regular expression to match the specific components you want to include or exclude from the result.
What is the significance of removing components from the result of 'find_path' in CMake?
Removing components from the result of 'find_path' in CMake can be significant in scenarios where a more specific or customized search behavior is required. By removing certain components from the result, you can fine-tune the search criteria to match your project's requirements more accurately. This can help in avoiding conflicts, managing dependencies, or ensuring compatibility with specific versions of libraries or packages. In some cases, removing components can also reduce unnecessary overhead and improve build performance by excluding unnecessary or irrelevant paths from the search results.
