use of as a library in my cmake project

[ggslayer]

Hi, the of project is compiled by make system, But in my case, my project is compiled by cmake, and I want to link of's .so/.a libraries into my project. I saw the makefile and compile command line:

g++ -c -g3 -DDEBUG -Wall -Werror=return-type -DGCC_HAS_REGEX -std=c++17 -DOF_USING_GTK -Wall -Werror=return-type -DGCC_HAS_REGEX -std=c++17 -pthread -D_REENTRANT -pthread -I/usr/include/gstreamer-1.0 -I/usr/include/orc-0.4 -I/usr/include/gstreamer-1.0 -I/usr/include/AL -I/usr/include/x86_64-linux-gnu -I/usr/include/rtaudio -I/usr/include/gtk-3.0 -I/usr/include/at-spi2-atk/2.0 -I/usr/include/at-spi-2.0 -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/usr/include/gtk-3.0 -I/usr/include/gio-unix-2.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/fribidi -I/usr/include/harfbuzz -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/uuid -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/../include/include -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/fmod/include -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/glm/include -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/glm/include/glm -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/glm/include/glm/detail -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/glm/include/glm/ext -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/glm/include/glm/simd -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/glm/include/glm/gtc -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/glm/include/glm/gtx -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/json/include -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/kiss/include -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/pugixml/include -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/tess2/include -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/utf8/include -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/utf8/include/utf8 -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/sound -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/communication -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/events -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/math -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/utils -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/3d -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/types -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/app -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/video -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/graphics -I/mnt/data/projects/jd-third-party/src/of-0.12/libs/openFrameworks/gl -pthread -D_REENTRANT -pthread -I/usr/include/gstreamer-1.0 -I/usr/include/orc-0.4 -I/usr/include/gstreamer-1.0 -I/usr/include/AL -I/usr/include/x86_64-linux-gnu -I/usr/include/rtaudio -I/usr/include/gtk-3.0 -I/usr/include/at-spi2-atk/2.0 -I/usr/include/at-spi-2.0 -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/usr/include/gtk-3.0 -I/usr/include/gio-unix-2.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/fribidi -I/usr/include/harfbuzz -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/uuid -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/../include/include -I/mnt/data/projects/jd-third-party/src/of-0.12/addons/ofxAssimpModelLoader/src -I/mnt/data/projects/jd-third-party/src/of-0.12/addons/ofxAssimpModelLoader/libs -I/mnt/data/projects/jd-third-party/src/of-0.12/addons/ofxAssimpModelLoader/libs/assimp -MMD -MP -MF /mnt/data/projects/jd-third-party/src/of-0.12/addons/obj/linux64/Debug/ofxAssimpModelLoader/src/ofxAssimpModelLoader.d -MT /mnt/data/projects/jd-third-party/src/of-0.12/addons/obj/linux64/Debug/ofxAssimpModelLoader/src/ofxAssimpModelLoader.o -o /mnt/data/projects/jd-third-party/src/of-0.12/addons/obj/linux64/Debug/ofxAssimpModelLoader/src/ofxAssimpModelLoader.o -c /mnt/data/projects/jd-third-party/src/of-0.12/addons/ofxAssimpModelLoader/src/ofxAssimpModelLoader.cpp

, so I want to link the commond line's libs by target_link_libraries / target_include_directories in cmake. Is there any problem in this way? and aother question: I saw when addons is used by of project, the addon source code is compiled with my code together, So, I must add the addon's to my cmake's add_executable ?

In general, I want to use of as a library, link to my program( which is not compiled by cmake), process ofAppNoWindow / ofRunMainLoop in my source code, can you give me some compile's advices? thankyou!

[kylerneva]

Hi 🙂
Short answer: yes, what you want to do is possible, but don’t try to copy the full Makefile command line into CMake.
• Translating all -I, -D, and flags manually will work at first, but it’s fragile and hard to maintain. openFrameworks relies on a lot of platform-specific logic that the Makefiles already handle for you.

About addons: your understanding is correct 👍
Addons are not prebuilt libraries. Their .cpp files are compiled together with your app, so in CMake you must add the addon sources to your target (via add_executable() or a library target), not just target_link_libraries().

If your goal is to use OF as a library:
• Either build OF normally and link against libopenFrameworks.a
• Or let CMake compile OF + addons as part of your project (closer to how OF works)

ofAppNoWindow / ofRunMainLoop is fine, just make sure:
• same compiler + C++ standard
• same build type (Debug/Release)

Hope this clarifies things — happy hacking with OF 🚀