Installing Your Own Library Locally
When you have developed a C++ library, you often want to use it in other projects on your local machine before distributing it more widely. There are two common methods for installing your library locally: using CMake's install mechanism and manually copying files. CMake provides a robust and standardized way to install libraries, headers, and CMake configuration files so that consumers can easily use your library with find_package. Manual copying involves directly placing your header and library files into the appropriate directories within the consumer project, but this approach is less scalable and does not support modern CMake workflows.
To install a library with CMake, you define install() rules in your CMakeLists.txt. These rules specify which files to copy and where to place them in the local system, such as under /usr/local or a custom directory. You also typically generate and install CMake package configuration files so that consumers can use find_package to locate your library and link to its targets. This setup allows consumers to simply add your library as a dependency in their own CMake projects, making integration much easier and less error-prone.
When preparing your library for installation, you should create an exported target in CMake. This target represents your library, encapsulating its include directories, linked libraries, and compile definitions. When consumers use find_package, they can link to this target directly, ensuring that all necessary compiler and linker options are set up automatically.
ConsumerProject/main.cpp
MyLibrary/CMakeLists.txt
ConsumerProject/CMakeLists.txt
123456#include <mylib.h> int main() { mylib_function(); }
Merci pour vos commentaires !
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Can you show me an example of CMake install rules for a library?
How do I create and export a CMake target for my library?
What are the steps to generate CMake package configuration files?
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When you have developed a C++ library, you often want to use it in other projects on your local machine before distributing it more widely. There are two common methods for installing your library locally: using CMake's install mechanism and manually copying files. CMake provides a robust and standardized way to install libraries, headers, and CMake configuration files so that consumers can easily use your library with find_package. Manual copying involves directly placing your header and library files into the appropriate directories within the consumer project, but this approach is less scalable and does not support modern CMake workflows.
To install a library with CMake, you define install() rules in your CMakeLists.txt. These rules specify which files to copy and where to place them in the local system, such as under /usr/local or a custom directory. You also typically generate and install CMake package configuration files so that consumers can use find_package to locate your library and link to its targets. This setup allows consumers to simply add your library as a dependency in their own CMake projects, making integration much easier and less error-prone.
When preparing your library for installation, you should create an exported target in CMake. This target represents your library, encapsulating its include directories, linked libraries, and compile definitions. When consumers use find_package, they can link to this target directly, ensuring that all necessary compiler and linker options are set up automatically.
ConsumerProject/main.cpp
MyLibrary/CMakeLists.txt
ConsumerProject/CMakeLists.txt
123456#include <mylib.h> int main() { mylib_function(); }
Merci pour vos commentaires !
