By default, we are getting the source code of a library (including CmakeLists.txt) and $REPO/buildexecuting it in it:
cmake ..
make install
, the cmakelibrary will be installed on /usr/local/includeand /usr/local/libon . This is known as a "partial installation".
If you want to install globally, you need to execute:
cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr ..
make all install
will install the library on /usr/includeand /usr/lib.