Could NOT find XXX (missing: XXX_LIBRARY XXX_DIR)

Sometimes from github Some plug-ins or library files are often missing when compiling some new packages downloaded from , such as

Could NOT find Bullet (missing: BULLET_DYNAMICS_LIBRARY BULLET_COLLISION_LIBRARY BULLET_MATH_LIBRARY BULLET_SOFTBODY_LIBRARY BULLET_INCLUDE_DIR)

perhaps

Could NOT find SDL (missing: SDL_LIBRARY SDL_INCLUDE_DIR)

The solution is as follows

With sdl For example

rosdep where-defined sdl
sudo apt-get install libsdl1.2-dev
Entering the first instruction will jump out a link , Open and find the missing Library , Install according to the version number