The package quarter provides CMake targets:

    find_package(qpOASES CONFIG REQUIRED)

    target_link_libraries(your_target PRIVATE qpOASES::qpOASES)

    For backward compatibility, the following variables are also provided:

    target_include_directories(your_target PRIVATE ${qpOASES_INCLUDE_DIR})
    target_link_libraries(your_target PRIVATE ${qpOASES_LIBRARY})