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copied!<p>Since you are using cmake, for linking directives instead of using add_definitions, use target_link_libraries</p> <pre><code>target_link_libraries(<targetname> "-Wl,--no-as-needed") target_link_libraries(<targetname> <libraries that you want to link even if apparently not necessary>) target_link_libraries(<targetname> "-Wl,--add-needed") target_link_libraries(<targetname> <libraries that you want to link according to the "default" criteria>) </code></pre> <p>Reference: <a href="http://www.cmake.org/cmake/help/v2.8.11/cmake.html#command:target_link_libraries" rel="nofollow">http://www.cmake.org/cmake/help/v2.8.11/cmake.html#command:target_link_libraries</a></p> <p>Also, for -fPIC and the like it's advisable that you use variables like CMAKE_CXX_FLAGS, and that you append flags to it.</p> <p>set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")</p> <p>Note: using list and append will not work with this, as normally lists elements are separated with semicolons. You can have flags depending on the type of build, for example CMAKE_CXX_FLAGS_DEBUG and CMAKE_CXX_FLAGS_RELEASE.</p> <p><a href="http://www.cmake.org/cmake/help/v2.8.11/cmake.html#variable:CMAKE_LANG_FLAGS_DEBUG" rel="nofollow">http://www.cmake.org/cmake/help/v2.8.11/cmake.html#variable:CMAKE_LANG_FLAGS_DEBUG</a> <a href="http://www.cmake.org/cmake/help/v2.8.11/cmake.html#variable:CMAKE_LANG_FLAGS_RELEASE" rel="nofollow">http://www.cmake.org/cmake/help/v2.8.11/cmake.html#variable:CMAKE_LANG_FLAGS_RELEASE</a></p>

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