Target_Link_Libraries: Establish Linkages in CMake
Overview
CMake, a popular cross-platform build system, provides the target_link_libraries command to establish dependencies between targets and link them together. This article explores its usage in three scenarios: linking to an internal target, specifying linker options, and integrating external libraries.Linking to an Internal Target
To link target A to an internal target B, use the following syntax: ``` target_link_libraries(A PUBLIC B) ``` This action adds B to the list of libraries that A depends on, ensuring that B is built before A and that its symbols are available to A at runtime.
Specifying Linker Options
To specify linker options for an executable or shared library, employ the target_link_options command:
``` target_link_options(A PUBLIC "-Wl,-rpath,path_to_library") ```This example sets an option (-rpath) that influences the runtime search path for shared libraries.
Integrating External Libraries
To integrate an external library like Boost into your project, use find_package before linking:
``` find_package(Boost REQUIRED COMPONENTS headers CONFIG PATHS...) target_link_libraries(A PUBLIC Boost::headers) ```This code searches for the Boost library, finds the headers component, and links A to its headers.
Conclusion
target_link_libraries is a powerful CMake command for managing dependencies and linker options. Understanding its usage enhances build processes, ensuring efficient and accurate software development.
تعليقات